IOBlazer is a multi-platform storage stack micro-benchmark. IOBlazer runs on Linux, Windows and OSX and it is capable of generating a highly customizable workload. Parameters like IO size and pattern, burstiness (number of outstanding IOs), burst interarrival time, read vs. write mix, buffered vs. direct IO, etc., can be configured independently. IOBlazer is also capable of playing back VSCSI traces captured using vscsiStats. The performance metrics reported are throughput (in terms of both IOPS and bytes/s) and IO latency.
IOBlazer evolved from a minimalist MS SQL Server emulator which focused solely on the IO component of said workload. The original tool had limited capabilities as it was able to generate a very specific workload based on the MS SQL Server IO model (Asynchronous, Un-buffered, Gather/Scatter). IOBlazer has now a far more generic IO model, but two limitations still remain:
- The alignment of memory accesses on 4 KB boundaries (i.e., a memory page)
- The alignment of disk accesses on 512 B boundaries (i.e., a disk sector).
Both limitations are required by the gather/scatter and un-buffered IO models.
A very useful new feature is the capability to playback VSCSI traces captured on VMware ESX through the vscsiStats utility. This allows IOBlazer to generate a synthetic workload absolutely identical to the disk activity of a Virtual Machine, ensuring 100% experiment repeatability.
TBD - TEST & WRITE REVIEW
TBD - TEST & WRITE REVIEW
2 comments:
This might be helpful, since I didn't see the link to download IOBlazer.
So have you tried it out yet?
http://labs.vmware.com/flings/ioblazer
Hi,
unfortunately I had no meaningful opportunity to test is so far. I still use IOmeter as my primary storage workload tool.
You can download IOblazer directly from IOblazer flink page at http://labs.vmware.com/flings/ioblazer
There is red download button on left upper corner of the page.
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