Tony Pearson is a Master Inventor and Senior IT Architect for the IBM Storage product line at the
IBM Systems Client Experience Center in Tucson Arizona, and featured contributor
to IBM's developerWorks. In 2018, Tony celebrates his 32th year anniversary with IBM Storage. He is
author of the Inside System Storage series of books. This blog is for the open exchange of ideas relating to storage and storage networking hardware, software and services.
(Short URL for this blog: ibm.co/Pearson )
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In his blog Rough Type, Nick Carr asks Where is my CloudBook?and points to John Markoff's 2-part series in the New York Times on computing in the clouds.(Read it here: Part 1, Part 2)
At first, I thought he meant computing while in an airplane, but instead, he is talking about computing on a laptop or other hand-held device that does not have an internal disk drive, no installedoperating system, no internal data storage. Instead, the idea is that you boot from a CD, accessyour data, and even some of your programs, over the internet. John used an Ubuntu Linux LiveCD in his example.
This week, I am in Sao Paulo, Brazil, and was "in the clouds" for over 10 hours flying from Dallas to here.The one time I am guaranteed "off-line" from the internet is on the plane, and I spend enough time on planesthat I am able to get work done despite being "disconnected".
The same reasons people want to get out of having a disk drive on their laptop, are the reasons data centersare getting out of internal disk on their servers.
disks crash, and typically are not protected in any RAID configuration on most laptops
operating systems get infected with viruses and malware
storage on one server is generally inaccessible to every other server
Booting from CD is especially clever. No more worrying about fixing your Windows registry, viruses,corrupted operating system files, or the cruft that accumulates on your C: drive that slowsyou down. The CD is the sameevery time, so it is like running your system with a freshly installed operating system every day.
The need for central repositories of data harkens back to the years of the IBM mainframe. Of course, whatmade sense back then continues to make sense now. The old 3270 terminals stored no data, and instead merelyprovided keyboard input and display text screen output to the vast amount of data stored on the central system.Today, the inputs are different, using your finger or mouse instead to point to what you want, sliding itacross to make things happen, and the output may now include photos, audio and video, but the concept isstill the same.
I carry my Ubuntu Linux LiveCD with me on every business trip. Combined with externally rewriteable media,such as a USB key, you can get work done even when you are in an airplane, and upload it whenyou are back on the net.
The proof-of-concept that IBM Haifa research center developed back in 1998 became what we now call the iSCSI protocol.The book iSCSI: The Universal Storage Connection introduces the history as follows:
In the fall of 1999 IBM and Cisco met to discuss the possibility of combining their SCSI-over-TCP/IP efforts. After Cisco saw IBM's demonstration of SCSI over TCP/IP, the two companies agreed to develop a proposal that would be taken to the IETF for standardization.
There are three ways to introduce iSCSI into your data center:
Through a gateway, like the IBM System Storage N series gateway, that allows iSCSI-based servers connect to FC-based storage devices
Through a SAN switch or director, a FC-based server can access iSCSI-based storage, an iSCSI-based server accessing FC-based storage, or even iSCSI-based servers attaching to iSCSI-based storage.
Directly through the storage controller.
IBM has been delivering the first method with its successful IBM System Storage N series gateway products, buttoday we have announced additional support for the second and third methods.Here's a quick recap.
New SAN director blades
Supporting the second method, IBM TotalStorage SAN256B Director is enhanced to deliver iSCSI functionality with a new M48 iSCSI Blade, which includes 16 ports (8 Fibre Channel ports; and 8 Ethernet ports for iSCSI connectivity). We also announced a new Fibre Channel M48 Blade which provides 10 Gbps Fibre Channel Inter Switch Link (ISL) connectivity between SAN256B Directors.
With support for Boot-over-iSCSI, diskless rack-optimized and blade servers can boot Windows or Linux over Ethernet,eliminating the management hassles with internal disk.
All of this is part of IBM's overall push into the Small and Medium size Business marketplace, making it easier to shop for and buy from IBM and its many IBM Business Partners, easier to deploy and install storage, and easier tomanage the storage once you have it.
I have arrived safely in Las Vegas for the IBM System Storage and Storage Networking Symposium. This eventis held once every year. The gold sponsors were: Brocade, Cisco, Finisar, Servergraph, and VMware. Our silversponsor was Qlogic.
I presented IBM's System Storage strategy and an overview of our product line. For those who missed it,our strategy is focused on helping customers in four key areas:
Optimize IT - to simplify and automate your IT operations and optimize performance and functionality, through server/storage synergies, storage virtualization, and intergrated storage infrastructure management.
Leverage Information - to enable a single view of trusted business information through data sharing, and to get the most value from information through Information Lifecycle Management (ILM).
Mitigate Risk - to comply with security and regulatory requirements, and keep your business running with a complete set of business continuity solutions. IBM offers a range of non-erasable, non-rewriteable storage, encryption on disk and tape, and support for IT Infrastructure Library (ITIL) service management disciplines.
Enable Business Flexibility - to provide scalable solutions and protect your IT investment through the use of open industry standards like Storage Networking Industry Association (SNIA) Storage Management Initiative Specification (SMI-S). IBM offers scalability in three dimensions: Scale-up, Scale-out, and Scale-within.
IBM has a broad storage portfolio, in seven offering categories:
Disk Systems, including our SAN Volume Controller, DS family, and N series.
Tape Systems, including tape drives, libraries and virtualization.
Storage Networking, a complete set of switches, directors and routes
Infrastructure Management, featuring the IBM TotalStorage Productivity Center software
Business Continuity, advanced copy services and the software to manage them
Lifecycle and Retention, our non-erasable, non-rewriteable storage including DR550, N series with SnapLock, and WORM tape support, Grid Archive Manager and our Grid Medical Archive Solution (GMAS)
Storage Services, everything from consulting, design and deployment to outsourcing and hosting.
I could talk all day on this, but given that the room was packed, every seat taken and the rest of the audience standing along the walls, I had to keep it down to one hour.
SAN Volume Controller Overview
I presented an overview of the IBM System Storage SAN Volume Controller (SVC), IBM's flagship disk virtualizationproduct. Rather than giving a long laundry list of features and benefits,I focused on the five that matter most:
Reduces the cost and complexity of managing storage, especially for mixed storage environments
Simplifies Business Continuity through non-disruptive data migration and advanced copy services
Improves storage utilization, getting more value from the storage hardware you already have
Enhances personnel productivity, empowering storage administrators to get their job done
Delivers high availability and performance
SAN Volume Controller - Customer Success Stories
A good part of this conference are presented by non-IBMers, which include Business Partners and clientssharing their experiences. In this session, we had two speakers share their experiences with SVC.
David Snyder keeps over 80 web sites online and available. His digital media technologiesteam uses SVC to make their storage administration easier, and ensure high availability for web site content creation and publishing.
Mark Prybylski manages storage at his company, a financial bank. His storage management team uses SVC Global Mirror which provides asynchronous disk mirroring between different types of disk, as part oftheir Business Continuity/Disaster Recovery plan.
The last session I attended was "Storage .. to Optimize your ECM depoloyments" by Jerry Bower, now working for IBM as part of our recent acquisition of the Filenet company. ECM stands for Enterprise Content Management, and IBM is the market leader in this space. Jerry gave a great overview of IBM Content Manager software suite, our newly acquired Filenet portfolio, and the storage supported.
After the sessions was a reception at the Solution Center with dozens of exhibitor booths. For example,Optica Technologies had their PRIZM productswhich are able to connect FICON servers to ESCON storage devices.
Continuing this week in Las Vegas, we had a great set of sessions today.
Fibre Channel Overview
I like the manner in whichJim Robinson presented this "basics" session on how Fibre Channel works, why it is spelled "Fibre" not "Fiber", and how all the different layers work in the protocol.
IBM Virtualization Engine TS7700 series
Jim Fisher from the IBM Tucson lab presented the TS7700 series, which replaces our Virtual Tape Server (VTS). Hehad performance numbers to show that it was faster in various measurements against the B20 model of the VTS. Itis supported on the z/OS, z/VM, z/VSE, TPF and z/TPF operating systems.
IBM E-mail Archiving and Storage solution
Ron Henkhaus provided an overview of IBM's E-mail Archive and Storage appliance. The solution combines IBM BladeCenter server blade, DS4200 serieswith SATA disk, and pre-installed software: IBM Content Manager, IBM Records Manager, IBM CommonStore for Lotus Domino and Microsoft Exchange, and IBM System Storage Archive Manager. Services are included to get it connected toyour e-mail environment.
Lee La Frese from our Tucson performance lab presented various performance featuresof the IBM System Storage DS8000 series, and how they compare to competition.
First, some interesting statistics.
Back in 2002, the average high-end EnterpriseStorage Server (ESS) model F20 was configured only for 4 Terabytes (TB). In 2004,the average ESS was up to 12 TB. Today, the average DS8100 is 17.4 TB and the averageDS8300 is 41.5 TB.
51 percent of DS8000 series are configured for FCP only (Linux, UNIX, Windows, i5/OS),35 percent FICON only (System z mainframe), and 14% have both mixed.
Average I/O density has stabilized to about 0.6 IOPS per GB. This means that for everyTB of business data, you can expect most applications to issue 600 Input/Output requestsper second.
While IBM SAN Volume Controller has the fastest SPC-1 and SPC-2 benchmarks, the DS8000also has good results. Looking at just the monolithic "scale-up" systems, DS8000 hasthe fastest SPC-1, and second place for SPC-2.
Compared against the EMC DMX-3, the IBM DS8000 series has superior performance.For example, comparing 2Gbps port performance on each, DMX-3 is able to do 20 IOPS perport, compared to DS8000 with 38 IOPS per port.Compared against HDS USP, the response time for 60,000 IOPS for HDS averaged 10.5 milliseconds (msec), compared to IBM DS8000 less than 6.5 msec.
There are some unique features of the DS8000 to optimize performance. Two areAdaptive Multi-stream Prefetching (AMP) which helps improve processing of databasequeries, and HyperPAV which helps on mainframe workloads.
For FATA disks, performance of sequential reads and writes is only 20 percent less than15K RPM FC disks, but a whopping 50 percent less for random access. Consider using FATAfor audio/video streaming, surveillance data, seismic recordings, and medical imaging.
Comparing 146GB 10K versus 300GB 15K from a capacity perspective was interesting.37TB of 300GB 15K had 20 percent better response time, but 25 percent less maximum throughput,than 37TB of 146GB drives. Depending on your workload, this can help decided which youchoose.
Lee also covered RAID rebuild performance. When an individual HDD fails that is part of a RAIDgroup, the DS8000 performs a rebuild onto a spare drive. A RAID-5 rebuild is processedat 52 MB/sec, compared to RAID-10 at 56 MB/sec. Rebuild processing is low priority,so any other workload will take higher priority to avoid impacting application performance.Compared to EMC, the IBM DS8000 can rebuild RAID-5 73GB 15K RPM drive in only 24 minutes, but it takes 37 minutes to do this on a DMX-3. That is 13 minutes of additional exposure where a second drive failure might cause you to lose all your data in that RAID group!
N series ILM and Business Continuity
James Goodwin from our Advanced Technical Support team presented IBM System Storage N series featuresthat relate to ILM and Business Continuity. He covered features like SnapShot, SnapLock,SnapVault and LockVault.
The IBM Storage and Storage Networking Symposium in Las Vegas continues ...
N series and VMware
Jeff Barnett presented how VMware manages disk image files in its VMfs repository, and how N series offersa better alternative. Virtual machines can access N series volumes directly.
Business Continuity with System i
Allison Pate presented the various Business Continuity options for System i. Many customersuse internal storage for System i, but this then hampers Business Continuity efforts. Instead,you can have IBM System Storage DS8000 or DS6000 series disk systems provide disk mirroringbetween clustered systems.
There was a lot of interest in DR550, one of our many compliance storage solutions. Ron Henkhauspresented an overview of our DR550 and DR550 Express offerings. Unlike the competitive disk-onlysolutions, such as the EMC Centera, the DR550 allows you to attach an automated tape library, managing large amounts of fixed content data at a much lower cost point. It also has encryption, for both diskand tape data.
Open Systems Disk Management
Siebo Friesenborg presented the various steps needed to troubleshoot performance problemswith open systems, including the use of "iostat" on AIX systems as an example, and the stepsyou can take to make formal Service Level Agreements (SLA) between the IT department and thevarious lines of business.
IBM Encryption - TS1120 and LTO-4 encryption comparison
Tony Abete presented TS1120 and LTO-4 encryption techniques. Deploying encryption is more thanjust choosing a tape drive. There are a variety of factors involved, such as whether to managethe keys from the application, the operating system, or the library manager. You need policiesto decided when to encrypt tapes and when not to, generating your keys, storing them, and sharingthem with your business partners, suppliers and service providers with which you send tapes.
I can tell that many people are feeling like they are "drinking from a firehose".IBM's success in storage reaches out to so many different aspects of information management,a variety of industries, and disciplines as varied as regulatory compliance and medical imaging.