Hi Xu, On 01.02.2015 21:39, Xu (Simon) Chen wrote: > RBD doesn't work extremely well when ceph is recovering - it is common > to see hundreds or a few thousands of blocked requests (>30s to > finish). This translates high IO wait inside of VMs, and many > applications don't deal with this well. this sounds like you don't have settings like osd max backfills = 1 osd recovery max active = 1
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