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SSD DC S3500 Workload Characterization in RAID Configurations
December 2013 White Paper
329903-001US 15
Figure 6. RAID 5 Random 100% Write @ 4KB Transfer Size with
Average Latency
Intel internal testing, October 2013
NOTES: There are gains in write performance as drives are added to the RAID 5 set. The change at queue
depth 1 from three drives to six drives is approximately 58% increase in IOPS. For eight drives,
the change is 97% increase in IOPS over the three drive set.
At a queue depth of 1, latency increases as more drives are added to the RAID set, most likely
caused by the additional overhead of calculating parity and striping across more drives. This
increases as the queue deepens.
Figure 7. RAID 5 Random 70% Read @ 4KB Transfer Size with
Average Latency
Intel internal testing, October 2013