Workload Performance Testing
With the synthetic tests out of the way, we can shift to workload performance. The results show a similar divide between the hard disk drive arrays and the Micron 5210 series SSDs. The small block size reads and writes in the database test shows typical SATA SSD performance with the highest performance coming from the heaviest workloads. This is due to the way flash scales performance with queue depth or in this case, outstanding IO (OIO).
The OLTP test using 8KB size blocks shows strong consistency through most of the test. In the 64 OIO plane in the scaling workload charge, the two drives lose some consistency. We see this issue in several tests at different times but in short bursts.
We can only assume the inconsistent areas are the 5210 Ion SSDs performing background operations.
The email workload shows wider deviation in the 32 and 64 OIO scale. If Micron designed this series for heavy workloads like the 9300 series we previously tested, this would worry us. The 5210 Ion will never see heavy, write-focused, workloads like many of the tests we're running today.
The archive test comes from Dell's Performance Lab and is one of the most stressful tests we run. This is due to the wide range of block sizes and mix of sequential and random reads and writes. The RAID controller helps to tame the test and allows the five arrays to keep the deviation to a minimum at the server level.