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New NVMes are Micron 9300 of maximum possible capacity — 12.8 TB. Each of these delivers even more write iops: 310k instead of 260k. Everything else remains the same.
The new write performance result for 100 RBD clients is 477029 iops(36% more than in the previous test). Remember that it’s only 4770 iops per a client, though. 10 RBD clients get 294000 iops in their case, that’s 29400 iops per a client, which is of course better.
What helped the performance? I guess the configuration did. In comparison to the previous test they changed the following:
