Thesis research: SSD vs. FC drive benchark tests – part I

typewriterI am writing my graduate thesis on the subject of Solid State Drive (SSD). By the way, D stands for DRIVE, not DISK, as SSD does not use disk. Now, with that out of the way…

I have been benchmarking a new SSD array that I have added to my companies SAN: an EMC CLARiiON Cx4-480 system running on 4Gb/s fiber. It will be 8Gb/s soon, but we are waiting on the NAS code (an EMC NS-40G) to catch up so it will support 8Gb/s: the firmware on the NAS only supports up to 4G currently. The SAN is held together with two Brocade 4900 FC switches.

About the disks that I will be testing and comparing:

Disks used: (5) EMC 70GB SSD and (5) 300GB FC disks.

SSD:

66.639 raw capacity -FC SSD – Manufacturer: STEC – Model: ZIV2A074 CLAR72 – Serial: STM0000E9CFD – 4Gbps

FC:

268.403 raw capacity – FC – Manufacturer: SEAGATE – Model: STE30065 CLAR300 – Serial: 3SJ09XWW – 4Gbps

  • Created RAID5 (RAID group 100) on five SSD model ZIV2A074, 66.639GB each.
  • Creating RAID5 (RG 101) on five 300GB FC disks: Seagate 15K.7 ST3300657FC
  • LUN 104 is assigned drive letter W: (disk 3) (RG100) and named “SSD
  • LUN 108 is assigned drive letter X: (disk 4) (RG101) and named “FC

The test server was installed and set up with one dual-port 4Gb/s HBA. Windows Server OS Standard with 1GB RAM.

SAN Management: EMC Navisphere 6.28.21.

Network: 4Gb/s fiber. 2-Brocade 4900B FC switches. Host HBA: Emulex LightPulse FC2243.

Host connection via EMC PowerPath v5.2

Test I/O is generated by Microsoft SQLIOSim; I/O generation utility to similate I/O patterns found within versions of Microsoft SQL server. The versions simulated are Microsoft SQL Server 2005, SQL Server 2000, and Server 7.0. Brent Ozar, a SQL expert, has a good video on using SQLIO on his web site at brentozar.com. I have learned some things from him and am using the tips on SQLIO for my benchmarking.

The monitoring will be done with EMC Navisphere Analyzer and SUN StorageTek Workload Analysis Tool (SWAT).

Here is a preliminary test on SSD vs. FC data rates using SQLIOSim to generate I/O and SWAT to record the results:

SSD:

SSD performance survey data rate

FC:

FC performance survey data rate

So far there is not much of a difference. The Fiber Channel drives are keeping up with the SSD. Of course, this is a preliminary test and other tests at this time are giving similar results. I continue to plan my testing methodology.

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