Re: how to debug slow rbd block device

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Am 22.05.2012 22:48, schrieb Mark Nelson:
Can you use something like iostat or collectl to check and see if the
write throughput to each SSD is roughly equal during your tests?
It is but just around 20-40MB/s. But they can write 260MB/s with sequential writes.

> Also, what FS are you using and how did you format/mount it?
just:
mkfs.xfs /dev/sdb1
mount options: noatime,nodiratime,nobarrier,discard

Stefan
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