JeffHebert 060001UEQ2 Tags:  ssd range disk iaas mid enterprise storage v7000 ibm svc 5,074 Views
“Procedures for replacing or adding nodes to an existing cluster”
Scope and Objectives
The scope of this document is two fold. The first section provides a procedure for replacing existing nodes in a SVC cluster non-disruptively. For example, the current cluster consists of two 2145-8F4 nodes and the desire is to replace them with two 2145-CF8 nodes maintaining the cluster size at two nodes. The second section provides a procedure to add nodes to an existing cluster to expand the cluster to support additional workload. For example, the current cluster consists of two 2145-8G4 nodes and the desire is to grow it to a four node cluster by adding two 2145-CF8 nodes.
The objective of this document is to provide greater detail on the steps required to perform the above procedures then is currently available in the SVC Software Installation and Configuration Guide, SC23-6628, located at www.ibm.com/storage/support/2145. In addition, it provides important information to assist the person performing the procedures to avoid problems while following the various steps.
Section 1: Procedure to replace existing SVC nodes non-disruptively
You can replace SAN Volume Controller 2145-8F2, 2145-8F4, 2145-8G4, and 2145-8A4 nodes with SAN Volume Controller 2145-CF8 nodes in an existing, active cluster without taking an outage on the SVC or on your host applications. In fact you can use this procedure to replace any model node with a different model node as long as the SVC software level supports that particular node model type. For example, you might want to replace a 2145-8F2 node in a test environment with a 2145-8G4 node previously in production that just got replaced by a new 2145-CF8 node.
Note: If you are attempting to replace existing 2145-4F2 nodes with new 2145-CF8 nodes do not use this procedure as you must use the procedure specifically for this sort of upgrade located at the following URL:
This procedure does not require changes to your SAN environment because the new node being installed uses the same worldwide node name (WWNN) as the node you are replacing. Since SVC uses this to generate the unique worldwide port name (WWPN), no SAN zoning or disk controller LUN masking changes are required. READ MORE>
JeffHebert 060001UEQ2 Tags:  virtualize ssd drive storage daas information hard technology consolidate 4,802 Views
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Originating Author: Wikibon Daemon
This paper was written and submitted by NetApp and is being republished with permission.
Flexible Choices to Optimize Performance
November 2008 | WP-7061-1008
Solid state drives (SSDs) based on flash memory are generating a lot of excitement. This enthusiasm is warranted because flash SSDs demonstrate latencies that are at least 10 times lower than the fastest hard disk drives (HDDs), often enabling response times more than 10X faster. For random read workloads, SSDs may deliver the I/O throughput of 30 or more HDDs while consuming significantly less power per disk. The performance of SSDscan reduce the number of fast-spinning hard disk drives you need in a storage system.Fewer disk drives translates into significant savings of power, cooling, and data center space. This performance benefit comes at a premium; flash SSDs are far more expensive per gigabyte of capacity than HDDs. Therefore SSDs are best applied in situations that require the highest performance.
The underlying flash memory technology used by SSDs has many advantages, particularly in comparison to DRAM. In addition to storage persistence, these advantages include higher density, lower power consumption, and lower cost per gigabyte. Because of these unique characteristics, NetApp is focusing on the targeted use of flash memory in storage systems and within your storage infrastructure in ways that can deliver the most performance acceleration for the minimum investment.
We are implementing flash memory solutions using SSDs for persistent storage, and we will also use flash memory directly to create expanded read caching devices. Caching can deliver performance that is comparable to or better than SSDs. Because you can complement a large amount of hard disk capacity with a relatively modest amount of read cache, caching is more cost effective for typical enterprise applications. As a result, more people can benefit from the performance acceleration achievable with flash technology.
You get even more flexibility and value from flash technology by combining it with the NetApp® unified storage architecture, which enables you to leverage your investment in flash memory to simultaneously accelerate multiple applications, whether they use SAN or NAS. Storage efficiency features such as deduplication for primary storage further increase your power, cooling, and space savings.
This white paper is an overview of NetApp’s plan to deliver SSDs (both native and virtualized arrays) plus flash-based read caching and of our ability to further leverage both of these technologies in caching architectures. Selection guidelines are provided to help you choose the right technology to reduce latency and increase your transaction rate while taking into consideration cost versus benefit.
JeffHebert 060001UEQ2 Tags:  xiv storage high ssd performance ibm disk availability emc 4,501 Views
The IBM XIV® Storage System demonstrates how storage can simplify management and provisioning, yielding optimizing benefits especially for virtualized server environments. This means that growth in data does not mean growth in complexity. XIV has a virtualized, grid-based architecture that enables self-tuning and self-healing, as well as amazing management with simplicity and low total costs.
OctobeIBM Storwize V7000 Unified Disk System The most powerful and easy-to-use innovative disk system in the storage marketplacer 14, 2011 5:54 PM
JeffHebert 060001UEQ2 Tags:  storage san disk enterprise ibm nas fc midrange ssd fibre 3,843 Views
Storage Efficiency through Real-time Data Compression for the Entire Data Lifecycle
Agnostic to Applications and Storage
IBM Real-time Compression appliances reduce storage capacity utilization by up to 80% without performance degradation. IBM Real-time Compression appliances increase the capacity of existing storage infrastructure helping organizations meet the demands of rapid data growth while also enhancing storage performance and utilization. The result is unprecedented cost savings, ROI, operational and environmental efficiencies.
The IBM Real-time Compression appliances address data optimization on primary storage so your capacity is optimized across all tiers of storage. The IBM Real-time Compression Appliance STN6500 and STN6800 align to your existing storage networking configuration for easy installation. The appliances install transparently in front of your existing NAS storage and thru patented real-time compression reduces the size of every file created. Read more>