Disk I/O capacity
We are experiencing some poor performance on our web application during a small stress test. We would like to determine the IOPS consumption of the application so we can evaluate the storage system. It is a Red Hat Linux/Oracle server running in VMware ESXi 4.1. What tools can I use to capture the necessary data needed to analyze ?
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The current setup is 4 10K SAS disks in a RAID 10. I was told this can do about 300 IOPS/sec. Looking at the performance tab on the vSphere client it shows the IOPS around 1000 during a load. Is this accurate? If the disks are only capable of 300 IOPS how is it recording 1000 IOPS? I will try the extop command.
Doing the calculations, approx 400 IOPs.
ASKER
The esxtop command showed me the reads/writes per second at it verified what the performance chart showed me. The IOPS are around 1000 and disk latency is 4ms. this runs for a bit but eventually the database comes back with TNS listener timeout error. Would it be safe to say that the disks are being overloaded even though latency is still low?
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Thanks! Glad I could help.
1.IO Meter
http://www.iometer.org/
2. CrystalDiskMark
http://crystalmark.info/software/CrystalDiskMark/index-e.html
3. HD Tach
http://www.majorgeeks.com/files/details/hdtach.html
4. Intel NAS Toolkit
http://www.intel.com/products/server/storage/NAS_Perf_Toolkit.htm
5. VDBench
http://sourceforge.net/projects/vdbench
6. VMware Fling IO Blazer
http://labs.vmware.com/flings/ioblazer
7. Jet Stress
http://www.microsoft.com/en-us/download/details.aspx?id=36849
8. SQLIO
http://www.microsoft.com/en-gb/download/details.aspx?id=20163
9. HDPARM
http://linux.about.com/od/commands/l/blcmdl8_hdparm.htm
10. dd for (Linix, Unix and Windows)
http://en.wikipedia.org/wiki/Dd_%28Unix%29
11. ATTO
http://www.attotech.com/disk-benchmark/
12. Bonnie++
http://www.coker.com.au/bonnie++/
13. FIO
http://www.linux.com/learn/tutorials/442451-inspecting-disk-io-performance-with-fio
14. hIOmon
http://www.hyperio.com/productsAndServices.htm
15. DiskTester
http://diglloydtools.com/manual/disktester-iops.html