IOMeter is a new addition to the NAS results. It is a I/O subsystem measurement and characteristic tool for single and clustered systems initially designed by Intel.

Iometer is both a workload generator (that is, it performs I/O operations in order to stress the system) and a measurement tool (that is, it examines and records the performance of its I/O operations and their impact on the system). It can be configured to emulate the disk or network I/O load of any program or benchmark, or can be used to generate entirely synthetic I/O loads. It can generate and measure loads on single or multiple (networked) systems.

I configured IOMeter to create a 1GB file on the target device, TS-809 Pro, and it will pull the performance of 5 minutes and report back the average transfer rate for various block size recordings. The results are 100% sequential; in the future this will be expanded to include random results.

Much like the results from IOzone, we have a very similar trend. At low record sizes the results are similar but as we increase the block size the rates diverge. Much to my surprise JBOD held out the at the top followed by RAID 0, RAID 5 and with RAID 6 taking up the rear. In any other case I would have expected JBOD to take up the rear and have RAID 0 be the pace setter.

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