| Is there any other evidence of this?
I have 20 5100 MAX (MTFDDAK1T9TCC) and have not experienced any real issues with them. I would pick my Samsung SM863a's or any of my Intel's over the Micron's, but I haven't seen the Micron's cause any issues for me. For what its worth, they are all FW D0MU027, which is likely more out of date, but it is working for me.
However, I would steer people away from the Micron 9100 MAX (MTFDHAX1T2MCF-1AN1ZABYY) as an NVMe disk to use for WAL/DB, as I have seen performance, and reliability issues with those.
Just my 2¢
Reed
Am 24.05.19 um 14:43 schrieb Paul Emmerich:
> * SSD model? Lots of cheap SSDs simply can't handle more than that
The customer currently has 12 Micron 5100 1,92TB (Micron_5100_MTFDDAK1)
SSDs and will get a batch of Micron 5200 in the next days
And there's your bottleneck ;) The Micron 5100 performs horribly in Ceph, I've seen similar performance in another cluster with these disks.
Basically they max out at around 1000 IOPS and report 100% utilization and feel slow.
Haven't seen the 5200 yet.
Paul
We have identified the performance settings in the BIOS as a major
factor. Ramping that up we got a remarkable performance increase.
Regards
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Heinlein Support GmbH
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