I think most storage users have figured this out. We've never done an SPC test, and probably will never do one. Anyone is free, however, to download the SPC code, lash it up to their CLARiiON, and have at it.
I responded with [Getting Under EMC Skin], and then followed up with a series explaining IBM SVC and SPC benchmarks here:
- [Controversy over Comparisons - Twin Towers]
- [What Constitutes a Disk System?]
- [PerformanceMetrics for Disk Systems]
- [SPC Benchmarks for Disk Systems]
- [Why Not Miles Per Hour?]
So what is the good news?Yesterday, our friends at NetApp took up Chuck's challenge and posted results on their FAS3040 as well as their EMC CLARiiON devices. IBM sells the FAS3040 under the name IBM System Storage N5300 disk system. Knowing that NetApp maintains excellent performance when it is doing point-in-time copies, NetApp ran both with and without on both boxes. I include DS4700 and DS4800 as well for comparison purposes, but only have them without FlashCopy running.
|IBM DS4800||No FlashCopy||45,014|
|NetApp FAS3040 (IBM N5300)||No SnapShot||30,985|
|NetApp FAS3040 (IBM N5300)||With SnapShot||29,958|
|EMC CLARiiON CX3-40||No SnapDrive||24,997|
|IBM DS4700 Express||No FlashCopy||17,195|
|EMC CLARiiON CX3-40||With SnapDrive||8,997|
One would expect some performance degradation with a box running point-in-time copies at the same time it is reading and writing data, but NetApp/IBM N5300 does not degrade by much, but EMC's drops a significant amount.
So what is the bad news? Last October, I welcomed HDS USP-V to the [Super High-End Club], but now we need to invite Texas Memory Systems as well.In 2006, I posted [Hybrid, Solid State and the future of RAID], and poked fun at Texas Memory Systems using the slogan "World's Fastest Storage", which at the time that honor belonged to IBM SAN Volume Controller instead.The VP of Texas Memory Systems, Woody Hutsell, explained the only reason their solid-state disk system, RAMSAN-320, didn't have faster results is that they didn't have the fastest IBM server to run against it. It may not surprise you that nearly everyone's SPC benchmarks use IBM servers because IBM has the fastest servers as well. I didn't have a million-dollar System p UNIX server to send Woody for this, but it looks like they have finally gotten one, and a new RAMSAN-400 device, as they have posted their latest results.
|Texas Memory Systems RAMSAN-400||Cache only||291,208|
|IBM SAN Volume Controller 4.2||Cache/External Disk||272,505|
|HDS USP-V||Cache/Internal Disk||200,245|
EMC doesn't publish numbers for their Symmetrix box, despite their announcement of faster SSD drives. They claim that SSD drives make their overall disk system performance faster, but without SPC benchmarks, we will never know. If you have a Symmetrix, this YouTube video may help you decide where it belongs:
|YouTube Video: Recycling the Symmetrix|
You can read all the[SPC-1 Benchmark Results]on the Storage Performance Council (SPC) website.
technorati tags: IBM, EMC, Chuck Hollis, SPC, SPC-1, NetApp, FAS3040, N5300, CLARiiON, CX3-40, SnapShot, SnapDrive, FlashCopy, DS4800, DS4700, Texas Memory Systems, RAMSAN-320, RAMSAN-400, SSD, Hybrid, RAID, HDS, USP-V, Symmetrix,