Hello, Baergen Thanks for your reply. Restart osd in planned, but my version is 15.2.7, so, I may have encountered the problem you said. Could you provide PR to me about optimize this mechanism? Besides that, if I don't want to upgrade version in recently, is a good way that adjust osd_pool_default_read_lease_ratio to lower? For example, 0.4 or 0.2 to reach the user's tolerance time. Yite Gu Josh Baergen <jbaergen@xxxxxxxxxxxxxxxx> 于2023年3月10日周五 22:09写道： > Hello, > > When you say "osd restart", what sort of restart are you referring to > - planned (e.g. for upgrades or maintenance) or unplanned (OSD > hang/crash, host issue, etc.)? If it's the former, then these > parameters shouldn't matter provided that you're running a recent > enough Ceph with default settings - it's supposed to handle planned > restarts with little I/O wait time. There were some issues with this > mechanism before Octopus 15.2.17 / Pacific 16.2.8 that could cause > planned restarts to wait for the read lease timeout in some > circumstances. > > Josh > > On Fri, Mar 10, 2023 at 1:31 AM yite gu <yitegu0@xxxxxxxxx> wrote: > > > > Hi all, > > osd_heartbeat_grace = 20 and osd_pool_default_read_lease_ratio = 0.8 by > > default, so, pg will wait 16s when osd restart in the worst case. This > wait > > time is too long, client i/o can not be unacceptable. I think adjusting > > the osd_pool_default_read_lease_ratio to lower is a good way. Have any > good > > suggestions about reduce pg wait time？ > > > > Best Regard > > Yite Gu > > _______________________________________________ > > ceph-users mailing list -- ceph-users@xxxxxxx > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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