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8K RANDOM READ/WRITE
We precondition our enterprise SSDs using 100% random 8K writes at QD256 for two drive fills. Performance data is recorded every second. We track this data to monitor the enterprise SSDs transition to steady-state and to verify that steady-state conditions are achieved before initiating queue depth testing. Steady-state is established after a full drive fill and the average steady-state 8K random write performance is approximately 255K IOPS.
The full performance average of the Memblaze 7A46 in 8K random write is 570K IOPS which we expected to be less than half of 4k, as it is moving twice the amount of data. This performance curve is very impressive. It levels off way down at QD4 and remains relatively steady throughout, pushing up just a bit near the end.
The 7A46 read performance of 1730K is very impressive, but still, we might have liked to see that line level off perhaps a QD sooner.
8K 70/30
8K 70/30 is representative of a typical database workload and 926K IOPS from a 3-DWPD SSD is very impressive.
8K 50/50
Once again, 730K 8K 50/50 write IOPS is something only a few enterprise 3-DWPD SSDs might achieve. Very impressive.
REPORT SUMMARY AND FINAL THOUGHTS
Having spent the past few days working with the Memblaze PBlaze7 7A46 gen5 6.4TB 3-DWPD enterprise SSD, there is no doubt whatsoever that it is one of the best sustained random write performers we have tested to date. The great things about such an SSD is the fact that the random write perfoemance traslates into both 50/50 and 70/30 mixed load performance. There is a competitor though!
We have recently reviewed the Dapustor Roealsen R6301 and I have to say that both of these SSDs are neck in neck for sustained random write performance, the only difference being that the R6301 is twice the capacity. This, of course, would also translate to a slight performance bump so we gotta believe that the MemBlaze PBlaze7 7A46, at least for its capacity, is the top dog on the block.
No matter how one looks at it, and as sweet as our sustained 4K read performance of 3400K was, the brute strength of the Memblaze PBlaze7 7A46 lies in its incredible 4K sustained random write speeds above 1200K. This practically doubles the performance of many competitor enterprise SSDs. Great work Memblaze!
