Hello, baergen Thanks for your reply, I got it. ☺ Best regards Yitte Gu Josh Baergen <jbaergen@xxxxxxxxxxxxxxxx> 于2023年3月13日周一 23:15写道： > (trimming out the dev list and Radoslaw's email) > > Hello, > > I think the two critical PRs were: > * https://github.com/ceph/ceph/pull/44585 - included in 15.2.16 > * https://github.com/ceph/ceph/pull/45655 - included in 15.2.17 > > I don't have any comments on tweaking those configuration values, and > what safe values would be. > > Josh > > On Sun, Mar 12, 2023 at 9:43 PM yite gu <yitegu0@xxxxxxxxx> wrote: > > > > 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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