If you missed the [IBM System Storage and Storage Networking Symposium] in San Diego, California last month (like I did because I was in Japan and India), here is your chance to attend the one next month in Europe, September 8-11, in beautiful[Montpellier, France]. Several of my colleagues from the IBM Tucson Executive Briefing Center are scheduled to speak at this event.
And maybe, perhaps, some IBM executives, will have something important to say next month also! Stay tuned!
For a list of other IBM events this year, see the [2008 schedule].
technorati tags: IBM, storage, symposium, events, San Diego, California, Japan, India, Europe, Montpellier, France
I made it a point NOT to be in an airplane on "Earth Day" yesterday.
Today, I am posting this from the Houston Airporton my way down to Cuernavaca, Mexico to participate in the Storage Symposium 2008 Mexico, April 24-25, 2008.
We have a list of speakers presenting on various topics. I will be covering IBM's leadership in thefollowing areas:
- Information Lifecycle Management (ILM)
- Archive and Compliance Solutions
- Disk storage virtualization
For those interested in the USA, there will be the [IBM System Storage and Storage Networking Symposium] in San Diego, California, July 14-18, 2008. Registration opened today!
And, it's not too late to sign up for IBM Tivoli's [Pulse 2008] conference that will be heldin Orlando, Florida, May 18-22, 2008. I'll be there Sunday and Monday only, in the Tivoli Storage track, so if you are planning to attend and wish to meet up with me while I am there, please send me a note!
technorati tags: IBM, Cuernavaca, Mexico, Storage, Symposium, San Diego, Pulse08, Orlando, Florida, Tivoli
This week I am in Chicago for the IBM Storage and Storage Networking Symposium, which coincides with the System x and BladeCenter Technical Conference. This allows the 800 attendees to attend both storage or server presentations at their convenience. There were hundreds of sessions, over 20 time slots, so for each time slot, you have 15 or so topics to choose from.Mike Kuhn kicked off the series of keynote sessions. Here's my quick recap of each one:
- Curtis Tearte, General Manager, IBM System Storage
Curtis replaced Andy Monshaw as General Manager for IBM System Storage. His presentation focused on how storage fits into IBM's Dynamic Infrastructure strategy. Some interesting points:
- a billion camera-enabled cell phones were sold in 2007, compared to 450 million in 2006.
- IBM expects that there will be 2 billion internet users by 2011, as well as trillions of "things".
- In the US, there were 2.2 million medical pharmacy dispensing errors resulting for handwritten prescriptions.
- Time wasted looking for parking spaces in Los Angeles consumed 47,000 gallons of gasoline, and generated 730 tons of carbon dioxide.
- In the US, 4.2 billion hours are lost, and 2.9 billion gallons of gas consumed, due to traffic congestion.
- Over the past decade, servers went from 8 watts to 100 watts per $1000 US dollars.
- Data growth appears immune to the economic recession. The digital footprint per person is expected to grow from 1TB today to over 15TB by 2020.
- 10 hours of YouTube videos are uploaded every minute.
- Bank of China manages 380 million bank accounts, processing over 10,000 transactions per second.
At the end of the session, Curtis transitioned from demonstrating his knowledge and passion of storage to his knowledge and passion in his favorite sport: baseball. Chicago is home to both the Cubs and the White Sox.
- Roland Hagan, Vice President Business Line Executive, System x
IBM sets the infrastructure agenda for the entire industry. The Dynamic Infrastructure initiative is not just IT, but a complete end-to-end view across all of the infrastructures in play, including transportation, manufacturing, services and facilities.Companies spent over $60 billion US dollars on servers last year. Of these, 53 percent for x86-based servers, 9 percent for Itanium-based, 26 percent for RISC-based (POWER6, SPARC, etc.), and 11 percent mainframe. Theeconomic downturn has impacted revenues, but the percentages continue about the same.
The dominant deployment model remains one application per server. As a result, power, cooling and management costs have grown tremendously. There are system admins opposed to consolidating server images with VMware, Hyper-V, Xen or other server virtualizaition technologies. Roland referred to these admins as "server huggers".To help clients adopt cloud computing technologies, IBM introduced [Cloudburst] appliances. IBM plans to offer specialized versions for developers, for service providers, and for enterprises.
IBM's Enterprise-X Architecture is what differentiates IBM's x86-based servers from all the competitors, surrounding Intel and AMD processors with technology that provides distinct advantages. For example, to support server virtualization, IBM's eX4 provides support for more memory, which often is more critical than CPU resources when deploying large number of guest OS images. IBM System x servers have an integrated management module (IMM) and was the first to change over from BIOS to the new Unified Extensible Firmware Interface [UEFI] standard.
IBM servers offer double the performance, consume half the power, and cost a third less to manage, than comparably priced servers from competitors. Of the top 20 more energy efficient server deployments, 19 are from IBM. Roland cited customer reference SciNet, a 4000-server supercomputer with 30,000 cores based on IBM [iDataPlex] servers. At 350 TeraFLOPs it is ranked #16 fastest supercomputer in the world, and #1 in Canada. With apower usage effectiveness (PUE) less than 1.2, it also is very energy efficient. This means that for every 12 watts of electricity going in to the data center, 10 watts are used for servers, storage and networking gear, andonly 2 watts used for power and cooling. Traditional data centers have PUE around 2.5, consuming 25 watts total for every 10 watts used by servers, storage and networking gear.
- Clod Barrera, Distinguished Engineer, Chief Technical Strategist for IBM System Storage
Clod presented trends and directions for disk and tape technology, disk and tape systems, and the direction towards cloud computing.
Whew! A lot to think about!
technorati tags: IBM, Chicago, Storage Symposium, System x, BladeCenter, Curtis Tearte, Roland Hagan,Andy Monshaw, baseball, Intel, AMD, IMM, UEFI, supercomputer, PUE, Clod Barrera, SciNet, Canada
Continuing my week in Chicago for the IBM Storage and Storage Networking Symposium and System x and BladeCenter Technical Conference, I presented a variety of topics.
- Hybrid Storage for a Green Data Center
The cost of power and cooling has risen to be a #1 concern among data centers. I presented the following hybrid storage solutions that combine disk with tape. These provide the best of both worlds, the high performance access time of disk with the lower costs and reduced energy consumption of tape.
- IBM [System Storage DR550] - IBM's Non-erasable, Non-rewriteable (NENR) storage for archive and compliance data retention
- IBM Grid Medical Archive Solution [GMAS] - IBM's multi-site grid storage for PACS applications and electronic medical records[EMR]
- IBM Scale-out File Services [SoFS] - IBM's scalable NAS solution that combines a global name space with a clustered GPFS file system, serving as the ideal basis for IBM's own[Cloud Computing and Storage] offerings
Not only do these help reduce energy costs, they provide an overall lower total cost of ownership (TCO) thantraditional WORM optical or disk-only storage configurations.
- The Convergence of Networks - Understanding SAN, NAS and iSCSI in the Data Center Network
This turned out to be my most popular session. Many companies are at a crossroads in choosing data and storage networking solutions in light of recent announcements from IBM and others. In the span of 75 minutes, I covered:
- Block storage concepts, storage virtualization and RAID levels
- File system concepts, how file systems map files to block storage
- Network Attach Storage, the history of the NFS and CIFS protocols, Pros and Cons of using NAS
- Storage Area Networks, the history of SAN protocols including ESCON, FICON and FCP, Pros and Cons of using SAN
- IP SAN technologies, iSCSI and Fibre Channel over Ethernet (FCoE), Pros and Cons of using this approach
- Network Convergence with Infiniband and Fibre Channel over Convergence Enhanced Ethernet (FCoCEE), why Infiniband was not adopted historically in the marketplace as a storage protocol, and the features and enhancements of Convergence Enhanced Ethernet (CEE) needed to merge NAS, SAN and iSCSI traffic onto a single converged data center network [DCN]
Yes, it was a lot of information to cover, but I managed to get it done on time.
- IBM Tivoli Storage Productivity Center version 4.1 Overview and Update
In conferences like these, there are two types of product-level presentations. An "Overview" explains howproducts work today to those who are not familiar with it. An "Update" explains what's new in this version of the product for those who are already familiar with previous releases. I decided to combine these into one sessionfor IBM's new version of [Tivoli Storage Productivity Center].I was one of the original lead architects of this product many years ago, and was able to share many personalexperiences about its evolution in development and in the field at client facilities.Analysts have repeatedly rated IBM Productivity Center as one of the top Storage Resource Management (SRM) tools available in the marketplace.
- Information Lifecycle Management (ILM) Overview
Can you believe I have been doing ILM since 1986? I was the lead architect for DFSMS which provides ILM support for z/OS mainframes. In 2003-2005, I spent 18 months in the field performingILM assessments for clients, and now there are dozens of IBM practitioners in Global Technology Services andSTG Lab Services that do this full time. This is a topic I cover frequently at the IBM Executive Briefing Center[EBC], because it addressesseveral top business challenges:
- Reducing costs and simplifying management
- Improving efficiency of personnel and application workloads
- Managing risks and regulatory compliance
IBM has a solution based on five "entry points". The advantage of this approach is that it allows our consultants to craft the right solution to meet the specific requirements of each client situation. These entry points are:
- Enterprise Content Management [ECM]
- Tiered Information Infrastructure - we don't limit ourselves to just "Tiered Storage" as storage is only part of a complete[information infrastructure] of servers,networks and storage
- Storage Optimization and Virtualization - including virtual disk, virtual tape and virtual file solutions
- Process Enhancement and Automation - an important part of ILM are the policies and procedures, such as IT Infrastructure Library [ITIL] best practices
- Archive and Retention - space management and data retention solutions for email, database and file systems
I did not get as many attendees as I had hoped for this last one, as I was competing head-to-head in the same time slot as Lee La Frese covering IBM's DS8000 performance with Solid State Disk (SSD) drives, John Sing covering Cloud Computing and Storage with SoFS, and Eric Kern covering IBM Cloudburst.
I am glad that I was able to make all of my presentations at the beginning of the week, so that I can then sit back and enjoy the rest of the sessions as a pure attendee.
technorati tags: IBM, Symp09, storage symposium, hybrid storage, DR550, NENR, WORM, GMAS, SoFS, PACS, EMR, NAS, GPFS, SAN, iSCSI, FCoE, FCoCEE, CEE, DCN, TCO, RAID, ESCON, FICON, Infiniband, Tivoli, Productivity Center, ILM, virtualization, ITIL, DS8000, SSD, Cloudburst, Information Infrastructure
Continuing my week in Chicago, I decided to attend some of the presentations from the System x side. This is the advantage of running both conferences in the same hotel, attendees can choose how many of each they want to participate in.
Wayne Wigley, IBM Advanced Technical Support (ATS), presented a series of presentations on different server virtualization offerings available for System x and BladeCenter servers. I am very familiar with virtualization implemented on System z mainframes, as well as IBM's POWER systems, and have working knowledge of Linux KVM and Xen, so I was well prepared to handle hearing the latest about Microsoft's Hyper-V and VMware's Vsphere version 4.
- Microsoft Hyper-V 2008
Hyper-V can run as part of Windows 2008, are standalone on its own.Different levels of Windows 2008 include licenses for different number of Windows virtual machines (VMs).Windows Server 2008 Standard includes 1 Windows VM, Enterprise includes 4 Windows VMs, and the Datacenter edition includes unlimited number of Windows VMs. If you want to run more Window VMs than come included, you need to pay extra for each additional one. For example, to run 10 Windows VMs on a 2-socket server would cost about $9000 US dollars on Standard but only $6000 US dollars on Datacenter edition (list prices from Microsoft Web site).
Unlike VMware, which takes a monolithic approach as hypervisor, Hyper-V is more like Xen with a microkernelized approach. This means you need a "parent" guest OS image, and the rest of the Guest OS images are then considered "child" images.These child images can be various levels of Windows, from Windows XP Pro to Windows Server 2008, Xen-enabled Linux, or even a non-hypervisor-aware OS.The "parent" guest OS image provides networking and storage I/O services to these "child" images.For the hypervisor-aware versions of Windows and Linux, Hyper-V allows optimized access to the hypervisor, "synthetic devices", and hypercalls. Synthetic devices present themselves as network devices, but only serve to pass data along the VMBus to other networking resources. This process does not require software emulation, and therefore offers higher performance for virtual machines and lower host system overhead.For non-hypervisor-aware OS images, Hyper-V provides device emulation through the "parent" image, which is slower.
Microsoft System Center Virtual Machine Manager (SCVMM) can manage both Hyper-V and VMware VI3 images.Wayne showed various screen shots of the GUI available to manage Hyper-V images.In standalone mode, you lose the nice GUI and management console.
Hyper-V supports external, internal and private virtual LANs (VLAN). External means that VMs can communicate with the outside world over standard ethernet connections. Internal means that VMs can communicate with "parent" and "child" guest images on the same server only. Private means that only "child" guests can communicate with other "child" images.
Hyper-V supports disk attached via IDE, SATA, SCSI, SAS, FC, iSCSI, NFS and CIFS. One mode is "Virtual Hard Disk" (VHD) similar to VMware VMDK files. The other is "pass through" mode, which are actual disk LUNs accessed natively. VHDs can be dynamic (thin provisioned), fixed (fully allocated), or differencing. The concept of differencing is interesting, as you start with a base read-only VHD volume image, and have a separate "delta" file that contains changes from the base image.
Some of the key features of Hyper-V 2008 are:
- Being able to run concurrently 32-bit and 64-bit versions of Linux and Windows guest images
- Support for 64 GB of memory and 4-way symmetric multiprocessing (SMP) per VM
- Clustering for High Availability and Quick Migration of VM images
- Live backup with integration with Microsoft's Volume Shadow Copy Services (VSS)
- Virtual LAN (VLAN) support, and Virtual and Pass-through physical disk support
- A clever VMbus, virtual service parent/client approach to sharing hardware
- Optimized performance options for hypervisor-aware versions of Windows and Linux, and emulated supportfor non-hypervisor-aware OS images.
- VMware Vsphere v4.0
This was titled as an "Overview" session, but really was an "Update" session on the newest features of this release. The big change appears to be that VMware added "v" in front of everything.
- Under vCompute, there are some new features on VMware's Distributed Resource Scheduler (DRS) which includes recommended VM migrations. Dynamic Power Management (DPM) will move VMs during periods of low usageto consolidate onto fewer physical servers so as to reduce energy consumption.
- Under vStorage, vSphere introduces an enhanced Plugable Storage Architecture (PSA), with supportfor Storage Array Type Plugins (SATP) and Path Selection Plugins (PSP). This vStorage API allows forthird party plugins for improved fault-tolerance and complex I/O load balancing algorithms. This releasealso has improved support for iSCSI, including Challenge-Handshake Authentication Protocol (CHAP) support.Similar to Hyper-V's dynamic VHD, VMware supports "thin provisioning" for their virtual disk VMDK files.A feature of "Storage Vmotion" allows conversion between "thick" and "thin" provisioning formats.
The vStorage API for Data Protection provide all the features of VMware Consolidated Backup (VCB). The APIprovides full, incremental and differential file-level backups for Windows and Linux guests, including supportfor snapshots and Volume Shadow Copy Services (VSS) quiescing.
VMware introduces direct I/O pass-through for both NIC and HBA devices. While thisallows direct access to SAN-attached LUNs similar to Hyper-V, you lose a lot of features like Vmotion, High Availability and Fault Tolerance. Wayne felt that these restrictions are temporary, that hopefully VMwarewill resolve this over the next 12 months.
- Under vNetwork, VMware has virtual LAN switches called vSwitches. This includes support for IPv6and VLAN offloading.
The vSphere server can now run with up to 1TB of RAM and 64 logical CPUs to support up to 320 VM guest images.Each VM can have up to 255GB RAM and up to 8-way SMP.Vsphere ESX 4 introduces a new virtual hardware platform called VM Hardware v7. While Vsphere 4.0 can run VMs from ESX 2 and ESX 3, the problem is if you have new VMs based on this newer VM Hardware v7, you cannot run them on older ESX versions.
Vsphere comes in four sizes: Standard, Advanced, Enterprise, and Enterprise Plus, ranging in list price from $795 US dollars to $3495 US dollars.
While IBM is the #1 reseller of VMware, we also are proud to support Hyper-V, Xen, KVM and other similar products.Analysts expect most companies will have two or more server virtualization solutions in their data center, and it is good to see that IBM supports them all.
technorati tags: IBM, Wayne Wigley, ATS, Hyper-V, Microsoft, SCVMM, SMP, VLAN, VMware, DRS, DPM, Vsphere, Vmotion, Xen, KVM, Linux, Windows, server virtualization
Continuing my week in Chicago, for the IBM Storage Symposium 2009, I attended what in my opinion was the bestsession of the week. This was by a guy named Chip Copper, who covered IBM's set of Ethernet and Fibre Channelnetworking gear. Attributes are the four P's:
- Performance, non-blocking
- Port density
- Power and Cooling (electricity usage)
Equipment comes in two flavors: Top-of-Rack (ToR) thin pizza box switches, and Middle-of-Row (MoR) much larger directors.The MoR directors are engineered for up to 50Gbps per half-slot, so 10GbE and the future 40GbE can be easily accommodated in a single half-slot, and the future 100GbE can be done with a full slot (two half-slots).
While many companies might have been contemplating the switch from copper wires to optical fiber, there is a new reason for copper cables: Power-over-Ethernet (PoE). Many IP-phones, digital video surveillance cameras, and other equipment can have a single cable that delivers both signal and electricity over copper. If you have already deployed optical fiber throughout the building, there are "last mile" options where the signals are converted to copper wires and electrical energy added for these types of devices.
Two directors can be connected together with Inter-Chassis Link (ICL) cables to make them look like a single director with twice the number of ports. These are different than Inter-Switch Links (ISL) as they are not counted as an extra "hop" for networking counting purposes, especially important for FICON usage.
Today, we have 1Gbps, 2Gbps, 4Gbps and 8Gbps Fibre Channel. Since these all use 10-for-8 encoding (10 bits represents one 8-bit byte), then in was easy to calculate throughput: 8Gpbs was 800 MB/sec, for example. Auto-negotiation between speeds is not done at the HBA card, switch or director blade itself, but in the Short Form-factor Pluggable (SFP) optical connector. However, you can only auto-negotiate if the encoding matches. The 4/2/1 SFP can run at 4Gbps or auto-negotiate to slower 2Gbps and 1Gbps. The 8/4/2 SFP can run at 8Gbps, or auto-negotiate down to slower 4Gpbs and 2Gbps. Folks who still have legacy 1Gbps equipment, but want to run some things at 8 Gbps, can buy 8Gbps-capable switches or director blades, but then put some 4/2/1 SFPs into them. These 4/2/1 SFP are cheaper, so this might be something to consider if budgets are tight. Some SFPs handle up to 10km distances, but others only 4km, so be careful not to order the wrong ones.
Unfortunately, there are proposals in place for 10Gbps and 40Gbps that would use a different 66-for-64 encoding (66 bits represent 8 bytes), so 10Gbps would be 1200 MB/sec. These are used today for ISL between directors and switches.In theory, the 40Gbps could auto-negotiate down to 10Gbps, but not to any of the 8/4/2/1 Gbps that use different 10-for-8 encoding.
For those who cannot afford a SAN768B, there is a smaller SAN384B that can carry: 192 ports (4Gpbs/2Gbps), 128 ports (8Gbps) or 24 ports (10Gbps). The SAN384B can be ICL connected to another SAN384B or even the SAN768B as your needs grow.
On the entry-level side, the SAN24B-4 offers a feature called "Access Gateway". This makes the SAN24B look like an SAN end-point host, rather than a switch, and makes initial deployment of integrated bundled solutions easier. Once connected to everything, you can convert it over to full "switch" mode.The SAN40B-4 and SAN80B-4 provide midrange level support, including Fibre Channel routing at the 8Gbps level. In fact, all 8Gbps ports include routing capability. IBM offers both single-port and dual-port 8Gbps host bus adapter (HBA) cards to connect to these switches. These HBA offer 16 virtual channels per port, so that if you have VMware running many guests, or want to connect both disk and tape to the same HBA, you can keep the channel traffic separate for Quality of Service (QoS).
Chip wrapped up his session to discuss Fibre Channel over Ethernet (FCoE), and explained why we need to have a loss-less Convergence Enhanced Ethernet (CEE) to meet the needs of storage traffic as well as traditional Fibre Channel does today. IBM offers all of the equipment you need to get started today on this FCoCEE, with Converged Network Ethernet cards for your System x servers, and a new SANB32 that has 24 10GbE CEE ports and 8 traditional 8Gbps FC ports. This means that you can put the CNA card in your existing servers, connect to this switch, and then connect to your existing 10GbE LAN and your existing 8Gpbs or 4Gpbs FC-based SAN to the rest of your storage devices.
Worried that the FCoE or CEE standards could change after you deploy this gear? Aren't most LAN and SAN switches based on Application-specific integrated circuit [ASIC] chips which are created in the factory? Don't worry, IBM's equipment have put all the standards-vulnerable portions of the logic into separate Field-programmable gate array [FPGA] that can be updated with simplya firmware upgrade. This is future-proofing I can agree with!
technorati tags: IBM, Brocade, Chip Copper, Ethernet, FC, FICON, FCP, DCN, ToR, MoR, PoE, HBA, ISL, ICL, SAN384B, SAN768B, SAN24B, SAN40B, SAN80B, SANB32, QoS, VMware, CEE, FCoE, FCoCEE
Continuing my week in Chicago, for the IBM Storage Symposium 2008, I attended two presentations on XIV.
- XIV Storage - Best Practices
Izhar Sharon, IBM Technical Sales Specialist for XIV, presented best practices using XIV in various environments.He started out explaining the innovative XIV architecture: a SATA-based disk system from IBM can outperformFC-based disk systems from other vendors using massive parallelism. He used a sports analogy:
"The men's world record for running 800 meters was set in 1997 by Wilson Kipketer of Denmark in a time of 1:41.11.
However, if you have eight men running, 100 meters each, they will all cross the finish line in about 10 seconds."
Since XIV is already self-tuning, what kind of best practices are left to present? Izhar presented best practicesfor software, hosts, switches and storage virtualization products that attach to the XIV. Here's some quickpoints:
- Use as many paths as possible.
IBM does not require you to purchase and install multipathing software as other competitors might. Instead, theXIV relies on multipathing capabilities inherent to each operating system.For multipathing preference, choose Round-Robin, which is now available onAIX and VMware vSphere 4.0, for example. Otherwise, fixed-path is preferred over most-recently-used (MRU).
- Encourage parallel I/O requests.
XIV architecture does not subscribe to the outdated notion of a "global cache". Instead, the cache is distributed across the modules, to reduce performance bottlenecks. Each HBA on the XIV can handle about 1400requests. If you have fewer than 1400 hosts attached to the XIV, you can further increase parallel I/O requests by specifying a large queue depth in the host bus adapter (HBA).An HBA queue depth of 64 is a good start. Additional settings mightbe required in the BIOS, operating system or application for multiple threads and processes.
For sequential workloads, select host stripe size less than 1MB. For random, select host stripe size larger than 1MB. Set rr_min_io between ten(10) and the queue depth(typically 64), setting it to half of the queue depth is a good starting point.
If you have long-running batch jobs, consider breaking them up into smaller steps and run in parallel.
- Define fewer, larger LUNs
Generally, you no longer need to define many small LUNs, a practice that was often required on traditionaldisk systems. This means that you can now define just 1 or 2 LUNs per application, and greatly simplifymanagement. If your application must have multiple LUNs in order to do multiple threads or concurrent I/O requests, then, by all means, define multiple LUNs.
Modern Data Base Management Systems (DBMS) like DB2 and Oracle already parallelize their I/O requests, sothere is no need for host-based striping across many logical volumes. XIV already stripes the data for you.If you use Oracle Automated Storage Management (ASM), use 8MB to 16MB extent sizes for optimal performance.
For those virtualizing XIV with SAN Volume Controller (SVC), define manage disks as 1632GB LUNs, in multiple of six LUNs per managed disk group (MDG), to balance across the six interface modules. Define SVC extent size to 1GB.
XIV is ideal for VMware. Create big LUNs for your VMFS that you can access via FCP or iSCSI.
- Organize data to simplify Snapshots.
You no longer need to separate logs from databases for performance reasons. However, for some backup productslike IBM Tivoli Storage Manager (TSM) for Advanced Copy Services (ACS), you might want to keep them separatefor snapshot reasons. Gernally, putting all data for an application on one big LUNgreatly simplifies administration and snapshot processing, without losing performance.If you define multiple LUNs for an application, simply put them into the same "consistencygroup" so that they are all snapshot together.
OS boot image disks can be snapshot before applying any patches, updates or application software, so that ifthere are any problems, you can reboot to the previous image.
- Employ sizing tools to plan for capacity and performance.
The SAP Quicksizer tool can be used for new SAP deployments, employing either the user-based orthroughput-based sizing model approach. The result is in mythical unit called "SAPS", which represents0.4 IOPS for ERP/OLTP workloads, and 0.6 IOPS for BI/BW and OLAP workloads.
If you already have SAP or other applications running, use actual I/O measurements. IBM Business Partners and field technical sales specialists have an updated version of Disk Magic that can help size XIV configurations fromPERFMON and iostat figures.
- XIV Performance
Lee La Frese, IBM STSM for Enteprise Storage Performance Engineering, presented internal lab test results forthe XIV under various workloads, based on the latest hardware/software levels [announced two weeks ago]. Three workloadswere tested:
The results were quite impressive. There was more than enough performance for tier 2 application workloads,and most tier 1 applications. The performance was nearly linear from the smallest 6-module to the largest 15-module configuration. Some key points:
- Web 2.0 (80/20/40) - 80 percent READ, 20 percent WRITE, 40 percent cache hits for READ.YouTube, FlickR, and the growing list at [GoWeb20] are applications with heavy read activity, but because of[long-tail effects], may not be as cache friendly.
- Social Networking (50/50/50) - 50 percent READ, 50 percent WRITE, 50 percent cache hits for READ.Lotus Connections, Microsoft Sharepoint, and many other [social networking] usage are more write intensive.
- Database (70/30/50) - 70 percent READ, 30 percent WRITE, 50 percent cache hits for READ.The traditional workload characteristics for most business applications, especially databases like DB2 andOracle on Linux, UNIX and Windows servers.
- A full 15-module XIV overwhelms a single SVC 8F4 node-pair. For a full XIV, consider 4 to 8 nodes 8F4 models, or 2 to 4 nodes of an 8G4. For read-intensive cache-friendly workloads, an SVC in front of XIV was able to deliver over 300,000 IOPS.
- A single node TS7650G ProtecTIER can handle 6 to 9 XIV modules. Two nodes of TS7650G were needed to drivea full 15-module XIV. A single node TS7650 in front of XIV was able to ingest 680 MB/sec on the seventh day with17 percent per-day change rate test workload using 64 virtual drives. Reading the data back got over 950 MB/sec.
- For SAP environments where response time 20-30 msec are acceptable, the 15-module XIV delivered over 60,000 IOPS. Reducing this down to 25,000-30,000 cut the msec response time to a faster 10-15 msec.
These were all done as internal lab tests. Your mileage may vary.
Not surprisingly, XIV was quite the popular topic here this week at the Storage Symposium. There were many moresessions, but these were the only two that I attended.
technorati tags: IBM, XIV, SATA, best practices, performance, Wilson Kipketer, massive parallelism, HBA, DBMS, Oracle, ASM, DB2, SVC, VMware, VMFS, TSM, Tivoli, SAP, Quicksizer, SAPS, PERFMON, iostat, Disk+Magic, TS7650G, ProtecTIER
Continuing my week in Chicago, at the IBM System x and BladeCenter Technical Conference, I attended an
awesome session that summarized IBM's Linux directions. Pat Byers presented the global forces that are
forcing customers to re-evaluate the TCO of their operating system choices, the need for rapid integration
in an ever-changing business climate, government stimulus packages, and technology that has enabled much
better solutions than we had during the last economic turn-down in 2001-2003.
IBM has been committed to Linux for over 10 years now. I was part of the initial IBM team in the 1990s to work on Linux for the mainframe. In various roles, I helped get Linux attachment tested for disk and tape systems, and helped get Linux selected as an operating system platform of choice for our storage management software.
Today, Linux-based server generate $7 Billion US dollars in revenues. For UNIX customers, Linux provides greater flexibility for hardware platform. For Windows customers, Linux provides better security and reliability.
Initially, Linux was used for simple infrastructure applications, edge-of-the-network and Web-based workloads.
This evolved to Application and Data serving, Enterprise applications like ERP, CRM and SCM. Today,
Linux is well positioned to help IBM make our world a smarter planet, able to handle business-critical applications. It is the only operating system to scale to the full capability of the biggest IBM System x3950M2 server.
Pat gave an examples of IBM's work with Linux helping clients.
- City of Stockholm
The city of Stockholm, Sweden introduced congestion pricing to reduce traffic.
IBM helped them deploy systems to collect tariffs from 300,000 vehicles a day, with real-time scanning and recognition of vehicle license plates, Web-accessible payment processing, and analytics for metrics and reporting. This configuration was able to
[reduce traffic by 25 percent in the first month].
- ConAgra Foods
IBM helped [ConAgra Foods] switch their SAP environment from a monolithic Solaris on SPARC deployment, to a more distributed one using Novell SUSE Linux on x86. The result? Six times faster performance at 75 percent lower total cost of ownership!
- North Carolina State University (NCSU)
IBM helped NCSU use Red Hat linux on BladeCenter to deploy their
[Virtual Computing Lab], a Cloud Computing solution for their
[30,000 students and 8,000 faculty and staff employees]. NCSU uses the Extreme Cluster Administration Toolkit [xCAT] to manage this Linux environment.
IBM's strategy has been to focus on working with two of the major Linux distributors: Red Hat and Novell. It also works with [Asianux] which is like the UnitedLinux for Asia, internationalized for Japan, Korea, and China. It handles special requests for other distributions, from CentOS to Ubuntu, as needed on a case by case basis.
IBM's Linux Technology Center of 600 employees help to enable IBM products for Linux, make Linux a better operating system, expand Linux's reach, and help drive collaboration and innovation. In fact, IBM is the #3 corporate contributor to the open source Linux kernel, behind Red Hat (#1) and Novell (#2). For most IBM products, IBM tests with Linux as rigorously as it does Microsoft Windows. IBM offers complete RTS/ServicePac and SupportLine service and support contracts for Red Hat and Novell Linux.
At the IBM Solutions Center this week, several booths used Linux bootable USB sticks to run their software.
[Novell SUSE Studio] was developed to help
customize Linux to the specific needs for independent vendors.
Both Red Hat and Novell offer distributions in four categories:
- Standard - for small entry-level servers, with support for a few virtual guests
- Advanced Platform - for bigger servers, and support for many or unlimited number of virtual guests
- High Performance Computing - HPC and Analytics for large grid deployments
- Real Time - for real time processing, such as with
[IBM WebSphere Real Time], where
sub-second response time is critical.
A key difference between Red Hat and Novell appears to be on their strategy towards server virtualization.
Red Hat wants to position itself as the hypervisor of choice, for both servers and desk top virtualization, announcing Kernel-based Virtual Machine
[KVM] on their Red Hat Enterprise Linux (RHEL) 5.4 release, and their new upcoming
RHEV-V, a tight 128MB hypervisor to compete against VMware ESXi. Meanwhile, Novell is focusing SUSE to be
the perfect virtual guest OS, being hypervisor-aware an dhaving consistent terms and licensing when run under any hypervisor, including VMware, Hyper-V, Citrix Xen, KVM or others.
IBM has tons of solutions that are based on Linux, including the IBM Information Server blade, the InfoSphere Balanced Warehouse, SAN Volume Controller (SVC), TS7650 ProtecTIER data deduplication virtual tape library, Grid Medical Archive Solution (GMAS), Scale-out File Services (SoFS), Lotus Foundations, and the IBM Smart Cube.
If you are interested in trying out Linux, IBM offers evaluation copies at no charge for 30 to 90 days. For
more on how to deploy Linux successfully on IBM servers, see the
[IBM Linux Blueprints] landing page.
technorati tags: IBM, Linux, UNIX, Windows, Solaris, SPARC, ERP, SRM, SCM, SAP, TCO, Stockholm Sweden, traffic, ConAgra Foods, NCSU, VCL, RedHat, RHEL, Novell, SUSE, xCAT, HPC, Real Time, VMware, ESXi, Hyper-V, Citrix, Xen, KVM, RHEV, RHEV-H, SVC, TS7650G, GMAS, SoFS, Lotus Foundations, Smart Cube
Continuing my week in Chicago, for the IBM Storage Symposium 2008, we had sessions that focused on individual products. IBM System Storage SAN Volume Controller (SVC) was a popular topic.
- SVC - Everything you wanted to know, but were afraid to ask!
Bill Wiegand, IBM ATS, who has been working with SAN Volume Controller since it was first introduced in 2003. answered some frequently asked questions about IBM System Storage SAN Volume Controller.
- Do you have to upgrade all of your HBAs, switches and disk arrays to the recommended firmware levels before upgrading SVC? No. These are recommended levels, but not required. If you do plan to update firmware levels, focus on the host end first, switches next, and disk arrays last.
- How do we request special support for stuff not yet listed on the Interop Matrix?
Submit an RPQ/SCORE, same as for any other IBM hardware.
- How do we sign up for SVC hints and tips? Go to the IBM
[SVC Support Site] and select the "My Notifications" under the "Stay Informed" box on the right panel.
- When we call IBM for SVC support, do we select "Hardware" or "Software"?
While the SVC is a piece of hardware, there are very few mechanical parts involved. Unless there are sparks,
smoke, or front bezel buttons dangling from springs, select "Software". Most of the questions are
related to the software components of SVC.
- When we have SVC virtualizing non-IBM disk arrays, who should we call first?
IBM has world-renown service, with some of IT's smartest people working the queues. All of the major storage vendors play nice
as part of the [TSAnet Agreement when a mutual customer is impacted.
When in doubt, call IBM first, and if necessary, IBM will contact other vendors on your behalf to resolve.
- What is the difference between livedump and a Full System Dump?
Most problems can be resolved with a livedump. While not complete information, it is generally enough,
and is completely non-disruptive. Other times, the full state of the machine is required, so a Full System Dump
is requested. This involves rebooting one of the two nodes, so virtual disks may temporarily run slower on that
- What does "svc_snap -c" do?
The "svc_snap" command on the CLI generates a snap file, which includes the cluster error log and trace files from all nodes. The "-c" parameter includes the configuration and virtual-to-physical mapping that can be useful for
disaster recovery and problem determination.
- I just sent IBM a check to upgrade my TB-based license on my SVC, how long should I wait for IBM to send me a software license key?
IBM trusts its clients. No software license key will be sent. Once the check clears, you are good to go.
- During migration from old disk arrays to new disk arrays, I will temporarily have 79TB more disk under SVC management, do I need to get a temporary TB-based license upgrade during the brief migration period?
Nope. Again, we trust you. However, if you are concerned about this at all, contact IBM and they will print out
a nice "Conformance Letter" in case you need to show your boss.
- How should I maintain my Windows-based SVC Master Console or SSPC server?
Treat this like any other Windows-based server in your shop, install Microsoft-recommended Windows updates,
run Anti-virus scans, and so on.
- Where can I find useful "How To" information on SVC?
Specify "SAN Volume Controller" in the search field of the
[IBM Redbooks vast library of helpful books.
- I just added more managed disks to my managed disk group (MDG), can I get help writing a script to redistribute the extents to improve wide-striping performance?
Yes, IBM has scripting tools available for download on
[AlphaWorks]. For example, svctools will take
the output of the "lsinfo" command, and generate the appropriate SVC CLI to re-migrate the disks around to optimize
performance. Of course, if you prefer, you can use IBM Tivoli Storage Productivity Center instead for a more
- Any rules of thumb for sizing SVC deployments?
IBM's Disk Magic tool includes support for SVC deployments. Plan for 250 IOPS/TB for light workloads,
500 IOPS/TB for average workloads, and 750 IOPS/TB for heavy workloads.
- Can I migrate virtual disks from one manage disk group (MDG) to another of different extent size?
Yes, the new Vdisk Mirroring capability can be used to do this. Create the mirror for your Vdisk between the
two MDGs, wait for the copy to complete, and then split the mirror.
- Can I add or replace SVC nodes non-disruptively? Absolutely, see the Technotes
[SVC Node Replacement page.
- Can I really order an SVC EE in Flamingo Pink? Yes. While my blog post that started all
this [Pink It and Shrink It] was initially just some Photoshop humor, the IBM product manager for SVC accepted this color choice as an RPQ option.
The default color remains Raven Black.
technorati tags: IBM, SVC, Audacity of Cope, svc_snap, Flamingo pink, Raven black, non-disruptive, svctools, AlphaWorks
Continuing my week in Chicago, for the IBM Storage Symposium 2008, I attended several sessions intended to answer the questions of the audience.
In an effort to be cute, the System x team have a "Meet the xPerts" session at their System x and BladeCenter Technical Conference, so the storage side decided to do the same. Traditionally, these have been called "Birds of a Feature", "Q&A Panel", or "Free-for-All". They allow anyone to throw out a question, and have the experts in the room, either
IBM, Business Partner or another client, answer the question from their experience.
- Meet the Experts - Storage for z/OS environments
Here were some of the questions answered:
- I've seen terms like "z/OS", "zSeries" and "System z" used interchangeably, can you help clarify what this particular session is about?
IBM's current mainframe servers are all named "System z", such as our System z9 or System z10. These replace the older zSeries models of hardware. z/OS is one of the six operating systems that run on this hardware platform. The other five are z/VM, z/VSE, z/TPF, Linux and OpenSolaris. The focus of this session will be storage attached and used for z/OS specifically, including discussions of Omegamon and DFSMS software products.
- What can we do to reduce our MIPS-based software licensing costs from our third party vendors?
Consider using IBM System z Integrated Information Processor
- What about 8 Gbps FICON?
IBM has already announced
[FICON Express8] host bus adapter (HBA) cards, that will auto-negotiate to 4Gbps and 2Gbps speeds. If you don't need full 8Gbps speed now, you can
still get the Express8 cards, but put 4/2/1 Gbps SFP ports instead. Currently, LongWave (LW) is only supported to 4km at 8Gbps speed.
- I want to use Global Mirror for my DS8100 to my remote DS8100, but also make test copies of my production data to
an older ESS 800 I have locally. Any suggestions? Yes, consider using FlashCopy to simplify this process.
- I have Global Mirror (GM) running now successfully with DSCLI, and now want to deploy IBM Tivoli Storage Productivity Center for Replication. Is that possible? Yes, Productivity Center for Replication will detect existing GM relationships, and start managing them.
- I have already deployed HyperPAV and zHPF, is there any value in getting Solid-State Drives as well?
HyperPAV and zHPF impact CONN time, but SSD impacts DISC time, so they are mutually complementary.
- How should I size my FlashCopy SE pool? SE refers to "Space Efficient", which stores only the changes
between the source and destination copies of each LUN or CKD volume involved. General recommendation is to start with 20 percent and adjust accordingly.
- How many RAID ranks should I configure per DS8000 extent pool? IBM recommends 4 to 8 ranks per pool.
- Meet the Experts: Storage for Linux, UNIX and Windows distributed systems
This session was focused on storage systems attached to distributed servers, as well as products from Tivoli used to manage them. Here were some of the questions answered:
- When we migrated from Tivoli Storage Manager v5 to v6, we lost our favorite "Operational Reporting" tool. How can we get TOR back? You now get the new Tivoli Common Reporting tool.
- How can we identify appropriate port distribution for multiple SVC node pairs for load balancing?
IBM Tivoli Storage Productivity Center v4.1 has hot-spot analysis with recommendations for Vdisk migrations.
- We tried TotalStorage Productivity Center way back when, but the frequent upgrades were killing us. How has it been lately? It has been much more stable since v3.3, and completely renamed to Tivoli Storage Productivity Center to avoid association with versions 1 and 2 of the predecessor product. The new "lightweight agents" feature of v4.1 resolve many of the problems you were experiencing.
- We have over 1600 SVC virtual disks, how do we handle this in IBM Tivoli Storage Productivity Center? Use the Filter capability in combination with clever naming conventions for your virtual disks.
- How can we be clever when we are limited to only 15 characters? Ok. We understand.
- We are currently using an SSPC with Windows 2003 and 2GB memory, but we are only using the Productivity Center for Replication feature of it. Can we move the DB2 database over to a Windows 2008 server with 4GB of memory?
Consider using the IBM Tivoli Storage Productivity Center for Replication software instead of SSPC for special
circumstances like this.
- We love the XIV GUI, how soon will all other IBM storage products have it also? As with every acquisition,
IBM evaluates if there are technologies from new products that can be carried back to existing products.
- We are currently using 12 ports on our existing XIV, and love it so much we plan to buy a second frame, but are concerned about consuming another 12 ports on our SAN switch. Any suggestions? Yes, use only six ports per frame. Just because you have more ports, doesn't mean you are required to use them.
- We have heard there are concerns from the legal community about using deduplication technology, any ideas how to address that?
Nobody here in the room is a lawyer, and you should consult legal counsel for any particular situation.
None of the IBM offerings intended for non-erasable, non-rewriteable (NENR) data retention records (DR550, WORM tape, N series SnapLock) support dedupe today, and none of IBM's deduplication offerings (TS7650,N series A-SIS,TSM) make any claims for fit-for-purpose for compliance regulatory storage. However, be assured that all of IBM's dedupe technology involves byte-for-byte comparisons so that you never lose any data due to false hash collisions. For all IBM compliance storage, what you write will be read back in the correct sequence of ones and zeros.
technorati tags: IBM, z/OS, System z, DFSMS, Omegamon, z/VM, z/VSE, z/TPF, Linux, OpenSolaris, Tivoli, Storage Manager, TSM, Productivity Center, SVC, XIV, GUI, WORM, DR550, NENR, SnapLock, A-SIS
Every January, we look back into the past as well as look into the future for trends to watch for the upcoming year. Ray Lucchesi of Silverton Consulting has a great post looking back at the [Top 10 storage technologies over the last decade]. I am glad to see that IBM has been involved with and instrumental in all ten technologies.
Looking into the future, Mark Cox of eChannel has an article [Storage Trends to Watch in 2011], based on his interviews with two fellow IBM executives: Steve Wojtowecz, VP of storage software development, and Clod Barrera, distinguished engineer and CTO for storage. Let's review the four key trends:
- Cloud Storage and Cloud Computing
No question: Cloud Computing will be the battleground of the IT industry this decade. I am amused by the latest spate of Microsoft commercials where problems are solved with someone saying "...to the cloud". Riding on the coat tails of this is "Cloud Storage", the ability to store data across an Internet Protocol (IP) network, such as 10GbE Ethernet, in support of Cloud Computing applications. Cloud Storage protocols in the running include NFS, CIFS, iSCSI and FCoE.
Mark writes "..vendors who aren't investing in cloud storage solutions will fall behind the curve."
- Economic Downturn forces Innovation
The old British adage applies: "Necessity is the mother of invention." The status quo won't do. In these difficult economic times, IT departments are running on constrained budgets and staff. This forces people to evaluate innovative technologies for storage efficiency like real-time compression and data deduplication to make better use of what they currently have. It also is forcing people to take a "good enough" attitude, instead of paying premium prices for best-of-breed they don't really need and can't really afford.
- IT Service Management
Companies are getting away from managing individual pieces of IT kit, and are focusing instead on the delivery of information, from the magnetic surface of disk and tape media, to the eyes and ears of the end users. The deployment mix of private, hybrid and public clouds makes this even more important to measure and manage IT as a set of services that are delivered to the business. IT Service Management software can be the glue, helping companies implement ITIL v3 best practices and management disciplines.
- Smarter Data Placement
A recent survey by "The Info Pro" analysts indicates that "managing storage growth" is considered more critical than "managing storage costs" or "managing storage complexity".
This tells me that companies are willing to spend a bit extra to deploy a tiered information infrastructure if it will help them manage storage growth, which typically ranges around 40 to 60 percent per year. While I have discussed the concept of "Information Lifecycle Management" (ILM), for the past four years on this blog, I am glad to see it has gone mainstream, helped in part with automated storage tiering features like IBM System Storage Easy Tier feature on the IBM DS8000, SAN Volume Controller and Storwize V7000 disk systems. Not all data is created equal, so the smart placement of data, based on the business value of the information contained, makes a lot of sense.
These trends are influencing what solutions the various different vendors will offer, and will influence what companies purchase and deploy.
technorati tags: IBM, Steve Wojtowecz, Clod Barrera, Mark Cox, Cloud Computing, Cloud, Storage, NFS, CIFS, iSCSI, FCoE, real-time compression, deduplication, IT Service Management, Easy Tier, DS8000, SVC, Storwize V7000
Recently, I spoke with Jarrett Potts, my long-time friend and former IBM colleague, who now works as Director of Strategic Marketing over at STORServer. If you have never heard of STORServer, it is a company that makes purpose-built backup appliances.
What is a Backup Appliance? It is an integrated solution of hardware and software that serves a single purpose: backup and recovery. STORServer Enterprise Backup Appliance (EBA) combines IBM's high-end x86 M4 server, IBM disk and tape storage, and IBM Tivoli Storage Manager (TSM) backup software.
(Fun Fact: The 2012 IBM year-end financial results were announced last month. IBM not only continues its #1 lead in servers overall, but has the #1 marketshare for high-end x86 servers, market-leading disk and tape storage hardware, and market leading backup software.)
To determine the appropriate size of your backup appliance, the folks at STORServer help you every step of the way. They figure out the number of TB you will backup every day, and even help configure all of the TSM server parameters to achieve the policies that make the most sense for your organization.
The appliance can backup every type of data, from databases and Virtual Machines (VMs) to documents, spreadsheets, and other unstructured data.
Are you then left with a solution too complicated to run yourself? No. The STORServer Console is an easy-to-use GUI for ongoing monitoring and maintenance. Plus, your friends at STORServer are only a phone call away in case you have any questions.
(FTC Disclosure: I work for IBM, and STORSever is an approved IBM Business Partner that uses IBM hardware and software to build their solution. I have no financial interest in STORServer, and was not paid by STORServer to mention their company or products on my blog. This post may be considered a celebrity endorsement of STORServer and its Enterprise Backup Appliances.)
Perhaps my readers feel that I am a bit biased in describing a TSM-based solution, and you want a second opinion. No worries, I understand. In the latest 165-page [2012 DCIG Backup Appliance Buyer's Guide], the STORServer models ranked very high. Here is an excerpt:
"Nowhere is this demand for purpose built appliances more evident than in the rise of purpose
built backup appliances (PBBAs) over the last few years and their anticipated growth rate
going forward. A recent market analysis performed by IDC found that worldwide PBBA revenue totaled $2.4 billion in 2011 which was a 42.4 percent increase over the prior year.
This scoring came into play in preparing this Buyer's Guide
as the STORServer EBA 3100 model scored so highly
overall that it fell outside of the two (2) standard deviations
that DCIG generally uses as a guideline for inclusion and
exclusion of products.
The reason DCIG included this model in this Buyer's Guide
whereas in other situations it might not is that DCIG is
unaware of any other backup appliance(s) from any other
providers that come close to matching the EBA 3100's
software and hardware attributes. As such, DCIG felt it
would be doing STORServer specifically and the market
generally a disservice by not highlighting in this Buyer's
Guide that such a backup appliance existed and was
generally available for purchase."
| ||Backup Appliance Models||Score||Ranking
|1. ||STORServer EBA 3100 ||91.70 ||ENTERPRISE|
|2. ||Symantec NetBackup 5220 Backup Appliance ||87.11 ||Recommended|
|3. ||STORServer EBA 2100 ||86.90 ||Recommended|
|4. ||STORServer EBA 1100 ||85.70 ||Recommended|
|5. ||STORServer EBA 800 ||85.60 ||Recommended|
|6. ||Symantec Backup Exec 3600 Appliance ||78.83 ||Excellent|
|7. ||Unitrends Recovery-823 ||76.55 ||Excellent|
|8. ||RackTop EBR-FE ||76.50 ||Excellent|
|9. ||Unitrends Recovery-833 ||76.25 ||Excellent|
|10. ||Unitrends Recovery-822 ||76.15 ||Excellent|
The STORServer is ideal for small and medium-sized business (SMB), but can scale quite large to handle business growth. If you are currently unhappy with your current backup environment, and feel now is the time to look around for a better way of taking backups, you won't go wrong choosing a solution based on IBM's market-leading server and storage hardware with Tivoli Storage Manager software.
technorati tags: IBM, System Storage, Tivoli Storage Manager, STORServer
Continuing my ongoing discussion on Solid State Disk (SSD), fellow blogger BarryB (EMC) points out in his [latest post
Oh – and for the record TonyP, I don't think I ever said EMC was using a newer or different EFDs than IBM. I just asserted that EMC knows more than IBM about these EFDs and how they actually work a storage array under real-world workloads.
(Here "EFD" is refers to "Enterprise Flash Drive", EMC's marketing term for Single Layer Cell (SLC) NAND Flash non-volatile solid-state storage devices. Both IBM and EMC have been selling solid-state storage for quite some time now, but EMC felt that a new term was required to distinguish the SLC NAND Flash devices sold in their disk systems from solid-state devices sold in laptops or blade servers. The rest of the industry, including IBM, continues to use the term SSD to refer to these same SLC NAND Flash devices that EMC is referring to.)
The disagreement resulted from his earlier statement from his post[IBM's amazing...part deux]:
Although STEC asserts that IBM is using the latest ZeusIOPS drives, IBM is only offering the 73GB and 146GB STEC drives (EMC is shipping the latest ZeusIOPS drives in 200GB and 400GB capacities for DMX4 and V-Max, affording customers a lower $/GB, higher density and lower power/footprint per usable GB.)
Here is where I enjoy the subtleties between marketing and engineering. Does the above seem like he is saying EMC is using newer or different drives? What are typical readers expected to infer from the statement above?
- That there are four different drives from STEC, in four different capacities. In the HDD world, drives of different capacities are often different, and larger capacities are often newer than those of smaller capacities.
- That the 200GB and 400GB are the latest drives, and that 73GB and 146GB drives are not the latest.
- That STEC press release is making false or misleading claims.
Uncontested, some readers might infer the above and come to the wrong conclusions. I made an effort to set the record straight. I'll summarize with a simple table:
|Raw capacity||128 GB||256 GB||512 GB|
|Usable (conservative format)||73 GB||146 GB||300 GB|
|Usable (aggressive format)||100 GB||200 GB||400 GB|
So, we all agree now that the 256GB drives that are formatted as 146GB or 200GB are in fact the same drives, that IBM and EMC both sell the latest drives offered by STEC, and that the STEC press release was in fact correct in its claims.
I also wanted to emphasize that IBM chose the more conservative format on purpose. BarryB [did the math himself] and proved my key points:
- Under some write-intensive workloads, an aggressive format may not last the full five years. (But don't worry, BarryB assures us that EMC monitors these drives and replaces them when they fail within the five years under their warranty program.)
- Conservative formats with double the spare capacity happen to have roughly double the life expectancy.
I agree with BarryB that an aggressive format can offer a lower $/GB than the conservative format. Cost-conscious consumers often look for less-expensive alternatives, and are often willing to accept less-reliable or shorter life expectancy as a trade-off. However, "cost-conscious" is not the typical EMC targeted customer, who often pay a premiumfor the EMC label. To compensate, EMC offers RAID-6 and RAID-10 configurations to provide added protection. With a conservative format, RAID-5 provides sufficient protection.
(Just so BarryB won't accuse me of not doing my own math, a 7+P RAID-5 using conservative format 146GB drives would provide 1022GB of capacity, versus 4+4 RAID-10 configuration using aggressive format 200GB drives only 800GB total.)
In an ideal world, you the consumer would know exactly how many IOPS your application will generate over the next five years, exactly how much capacity you will require, be offered all three drives in either format to choose from, and make a smart business decision. Nothing, however, is ever this simple in IT.
technorati tags: IBM, SSD, EMC, EFD, SLC, NAND, Flash, disk, storage systems, life expectancy, reliability, capacity, Barry Burke, STEC, IOPS
Yesterday's post [Software Programmers as Bees
]was not meant as "career advice", but certainly I got some interesting email as if it was.Orson Scott Card was poking fun at the culture clash between software programmers andmanagement/marketers, and I gave my perspective, having worked both types of jobs.
This is June. Many students are graduating from high school or college and lookingfor jobs. Some of these might be jobs just for the summer to make some spending money,and others mights be jobs like internships to explore different career paths. I found both programming and marketing are rewarding and interesting work, but each person is different.
There are a variety of ways to find out what your personality traits are,and then focus on those jobs or career paths that are best for those strengths. Hereis an online [Typology Test] based onthe work of psychologists Carl Jung and Isabel Myers-Briggs. The result is a four-letterscore that represents 16 possible personalities. For example, mine is "ENTP",which stands for "Extroverted, Intuitive, Thinking, Perceiving". You can find out otherfamous people that match your personality type. For ENTP, I am lumped together withfellow master inventor Thomas Edison, fellow author Lewis Carrol (Alice in Wonderland), Cooking great Julia Child, Comedians George Carlin and Rodney Dangerfield (I get no respect!),movie director Alfred Hitchcock, and actor Tom Hanks.
USA Today had an article ["CEOsvalue lessons from teen jobs"] which offers some career advice from successful business people.Of course, what worked for them may not work for you, all based on different personality types. Hereis an excerpt of the advice I thought the most useful:
- "If you are committed, you will be successful." (unfortunately, the reverse is also true: if you are successful,you will be asked to move to a different job)
- "Tackle offbeat jobs. Challenge conventional wisdom within reason. Come into contact with people from all walks of life."
- "Show an interest, demonstrate you want to be on the job."
- "Never limit yourself. Look beyond to what needs to be done, or should be done. Then do it. Stretch. Go beyond what others expect."
- "Find a job that forces you to work effectively with people. No matter what you end up doing, dealing with others will be critical."
- "Bring your best to the table every day. Learn professional responsibility and how to handle difficult situations."
- "Listen carefully to what customers want."
Before IBM, I ran my own business. If you are thinking, "Maybe I will start my own business instead?" you might want to see this advice from Venture Capitalist [Guy Kawasaki on Innovation].While running your own business has advantages, like avoiding issues "working for the man", it has somedisadvantages as well. It is certainly not as easy as some people make it seem to be.
Of course, things are a lot different nowadays than they were when these CEOs were teenagers. And the pace ofchange does not seem to be slowing down any either. Here is a presentation on [SlideShare.net] that helps bring to focus the realities of globalization:
But in the future, you will not just be competing with other smart people around the globe.Which brings me to "the Singularity". The Institute of Electrical and Electronics Engineers, Inc. (IEEE) has [The Singularity - A Special Report], a whole issue of Spectrum Online devoted to this.Nick Carr offers his thoughts on this on his Rough Type blog in his post[What we talk about when we talk about singularity].
Whether you are a student looking for a job, or a seasoned professional willing to share some career advice,enter a comment below.
technorati tags: career advice, Carl Jung, Myers-Briggs, ENTP, USA Today, Thomas Edison, Guy Kawasaki, venture capitalist, Shift Happens, IEEE, Spectrum, Nick Carr, Rough Type, engineers
Wrapping up this week's theme on why the System z10 EC mainframe can replace so many older, smaller,underutilized x86 boxes.This was all started to help fellow bloggers Jon Toigo of DrunkenData
and Jeff Savit from Sun Microsystems
understand our IBM press release that we put out last February on this machine with my post[Yes, Jon, there is a mainframe that can help replace 1500 x86 servers
] and my follow uppost [Virtualization, Carpools and Marathons"
].The computations were based on running 1500 unique workloads as Linux guests under z/VM, and notrunning them as z/OS applications.
My colleagues in IBM Poughkeepsierecommended these books to provide more insight and in-depth understanding. Looks like some interesting summer reading. I put in quotes thesections I excerpted from the synopsis I found for each.
|[In Search of Clusters] by Gregory F. Pfister|
"From Microsoft to IBM, Compaq to Sun to DEC, virtually every large computer company now uses clustering as a key strategy for high-availability, high-performance computing. This book tells you why-and how. It cuts through the marketing hype and techno-religious wars surrounding parallel processing, delivering the practical information you need to purchase, market, plan or design servers and other high-performance computing systems.
- Microsoft Cluster Services ("Wolfpack")
- IBM Parallel Sysplex and SP systems
- DEC OpenVMS Cluster and Memory Channel
- Tandem ServerNet and Himalaya
- Intel Virtual Interface Architecture
- Symmetric Multiprocessors (SMPs) and NUMA systems"
Fellow IBM author Gregory Pfister worked in IBM Austin as a Senior Technical Staff Member focused on parallel processing issues, but I never met him in person. He points out that workloads fall into regions called parallel hell
, parallel nirvana
, and parallel purgatory
. Careful examination of machine designs and benchmark definitions will show that the “industry standard benchmarks" fall largely in parallel nirvana
and parallel purgatory
. Large UNIX machines tend to be designed for these benchmarks and so are particularly well suited to parallel purgatory
. Clusters of distributed systems do very well in parallel nirvana
. The mainframe resides in parallel hell
as do its primary workloads. The current confusion is where virtualization takes workloads, since there are no good benchmarks for it.
|[Guerilla Capacity Planning] by Neil J. Gunther|
"In these days of shortened fiscal horizons and contracted time-to-market schedules, traditional approaches to capacity planning are often seen by management as tending to inflate their production schedules. Rather than giving up in the face of this kind of relentless pressure to get things done faster, Guerrilla Capacity Planning facilitates rapid forecasting of capacity requirements based on the opportunistic use of whatever performance data and tools are available in such a way that management insight is expanded but their schedules are not."
Neil Gunther points out that vendor claims of near linear scaling are not to be trusted and shows a method to “derate” scaling claims. His suggested scaling values for data base servers is closer IBM's LSPR-like scaling model, than TPC-C or SPEC scaling. I had mentioned that "While a 1-way z10 EC can handle 920 MIPS, the 64-way can only handle 30,657 MIPS."in my post, but still people felt I was using "linear scaling". Linear scaling would mean that if a 1Ghz single-core AMD Opteron can do four(4) MIPS, and an one-way z10 EC can do 920 MIPS, than one might assume that 1GHz dual-core AMD could do eight(8) MIPS, and the largest 64-way z10 EC can do theoretically 64 x 920 = 58,880 MIPS. The reality is closer to 6.866 and 30,657 MIPS, respectively.
This was never an IBM-vs-Sun debate. One could easily make the same argument that a large Sun or HP system could replace a bunch of small 2-way x86 servers from Dell. Both types of servers have their place and purpose, and IBMsells both to meet the different needs of our clients. The savings are in total cost of ownership, reducing powerand cooling costs, floorspace, software licenses, administration costs, and outages.
I hope we covered enough information so that Jeff can go back about talking about Sun products, and I can go backto talk about IBM storage products.
technorati tags: IBM, z10, EC, Jon Toigo, DrunkenData, Jeff Savit, Sun, Gregory Pfister, Austin, Neil Gunther, MIPS, LSPR, SPEC, TPC-C, mainframe, scalability, UNIX, Linux, z/OS, HP, Dell