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 <[email protected]> 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 -- [email protected] > To unsubscribe send an email to [email protected] _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
