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SanDisk Optimus Eco SSD RAID Enterprise Performance Analysis

By: Paul Alcorn | RAID/HBA in IT/Datacenter | Posted: Oct 17, 2014 2:03 pm

8k Random Read/Write






Many server workloads rely heavily upon 8k performance, and we include this as a standard with each evaluation. Many of our server workloads also test 8k performance with various mixed read/write distributions.


The eight-drive RAID 0 and RAID 10 results are nearly mirror images with 365,000 IOPS at 256 OIO. The four-drive RAID 0 and RAID 10 results are also closely aligned at 205,000 IOPS






The four-drive arrays peak a little over the 1ms mark, while the eight-drive arrays stay well below, delivering over 350,000 IOPS.




The eight-drive RAID 0 array averages an impressive 146,314 IOPS at 256 OIO, but does experience a bit of variability at the higher-end of the chart. This can be mitigated by enabling caching on RAID controllers, which will smooth out random write performance under heavy load. The four-drive RAID 0 and eight-drive RAID 10 both offer roughly 70,000 IOPS, and the four-drive RAID 10 provides 34,953 IOPS.






The difference in performance from the RAID 0 array is very clear in this test, as it provides significantly more performance within a much lower latency envelope.




Scaling in the 8K mixed workload is within expectations, though we do note a bit of variability in the 70%-90% range. This is due to the resilient Optimus ECO drives fighting our best efforts to keep them in a steady state, in spite of the lengthy amount of time we run each individual workload in this test. The Optimus ECO drives feature extremely aggressive recovery mechanisms to provide the best performance, even under the heaviest workloads.

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