IOMeter is a new addition to the NAS results. It is an 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-439 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. JBOD has a great run at the 16KB block size and has the small difference between read and write results. The remaining RAID results are very close together and almost impossible to differentiate.

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