Re: how to debug slow rbd block device

[Stefan Priebe <s.priebe@xxxxxxxxxxxx>]

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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