IBM Scale-Out NAS Sets World Performance Record

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My series last week on IBM Watson (which you can read [here], [here], [here], and [here]) brought attention to IBM's Scale-Out Network Attached Storage [SONAS]. IBM Watson used a customized version of SONAS technology for its internal storage, and like most of the components of IBM Watson, IBM SONAS is commercially available as a stand-alone product.

Like many IBM products, SONAS has gone through various name changes. First introduced by Linda Sanford at an IBM SHARE conference in 2000 under the IBM Research codename Storage Tank, it was then delivered as a software-only offering SAN File System, then as a services offering Scale-out File Services (SoFS), and now as an integrated system appliance, SONAS, in IBM's Cloud Services and Systems portfolio.

If you are not familiar with SONAS, here are a few of my previous posts that go into more detail:

• [Area Rugs versus Wall-to-Wall carpeting]
• [More details about IBM clustered scalable NAS]
• [ILM and HSM on Integrated Systems]
• [SONAS video from NAB 2010 Conference]
• [SONAS guest post by John Sing]
• [Was SAN File System really five years ahead of its time?]

This week, IBM announces that SONAS has set a world record benchmark for performance, [a whopping 403,326 IOPS for a single file system]. The results are based on comparisons of publicly available information from Standard Performance Evaluation Corporation [SPEC], a prominent performance standardization organization with more than 60 member companies. SPEC publishes hundreds of different performance results each quarter covering a wide range of system performance disciplines (CPU, memory, power, and many more). SPECsfs2008_nfs.v3 is the industry-standard benchmark for NAS systems using the NFS protocol.

(Disclaimer: Your mileage may vary. As with any performance benchmark, the SPECsfs benchmark does not replicate any single workload or particular application. Rather, it encapsulates scores of typical activities on a NAS storage system. SPECsfs is based on a compilation of workload data submitted to the SPEC organization, aggregated from tens of thousands of fileservers, using a wide variety of environments and applications. As a result, it is comprised of typical workloads and with typical proportions of data and metadata use as seen in real production environments.)

The configuration tested involves SONAS Release 1.2 on 10 Interface Nodes and 8 Storage Pods, resulting a single file system over 900TB usable capacity. 10 Interface Nodes; each with: Maximum 144 GB of memory One active 10GbE port 8 Storage Pods; each with: 2 Storage nodes and 240 drives Drive type: 15K RPM SAS hard drives Data Protection using RAID-5 (8+P) ranks Six spare drives per Storage Pod

IBM wanted a realistic "no compromises" configuration to be tested, by choosing:

1. Regular 15K RPM SAS drives, rather than a silly configuration full of super-expensive Solid State Drives (SSD) to plump up the results.
2. Moderate size, typical of what clients are asking for today. The Goldilocks rule applies. This SONAS is not a small configuration under 100TB, and nowhere close to the maximum supported configuration of 7,200 disks across 30 Interface Nodes and 30 Storage Pods.
3. Single file system, often referred to as a global name space, rather than using an aggregate of smaller file systems added together that would be more complicated to manage. Having multiple file systems often requires changes to applications to take advantage of the aggregate peformance.  It is also more difficult to load-balance your performance and capacity across multiple file systems.  Of course, SONAS can support up to 256 separate file systems if you have a business need for this complexity.

The results are stunning. IBM SONAS handled three times more workload for a single file system than the next leading contender. All of the major players are there as well, including NetApp, EMC and HP.

Congratulations to the SONAS development and test teams! Scale-Out NAS is a competitive space. SONAS can handle not only large streaming files but also small random I/O workloads extraordinarily well. Just in the last two years, to compete against IBM's leadership in this realm, [HP acquired Ibrix], [EMC acquired Isilon] and [Dell has acquired what's left of Exanet's assets], THey have a lot of catching up to do!

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