Hi, I'm not sure if it just mounts the cephfs without using or doing any operation within the mounted directory would be affected by flushing cache. I mounted cephfs on osd servers only for testing and then left it there. Anyway I will umount it.
Thanks John Spray <[email protected]>于2018年8月8日 周三03:37写道： > On Tue, Aug 7, 2018 at 5:42 PM Reed Dier <[email protected]> wrote: > > > > This is the first I am hearing about this as well. > > This is not a Ceph-specific thing -- it can also affect similar > systems like Lustre. > > The classic case is when under some memory pressure, the kernel tries > to free memory by flushing the client's page cache, but doing the > flush means allocating more memory on the server, making the memory > pressure worse, until the whole thing just seizes up. > > John > > > Granted, I am using ceph-fuse rather than the kernel client at this > point, but that isn’t etched in stone. > > > > Curious if there is more to share. > > > > Reed > > > > On Aug 7, 2018, at 9:47 AM, Webert de Souza Lima <[email protected]> > wrote: > > > > > > Yan, Zheng <[email protected]> 于2018年8月7日周二 下午7:51写道： > >> > >> On Tue, Aug 7, 2018 at 7:15 PM Zhenshi Zhou <[email protected]> > wrote: > >> this can cause memory deadlock. you should avoid doing this > >> > >> > Yan, Zheng <[email protected]>于2018年8月7日 周二19:12写道： > >> >> > >> >> did you mount cephfs on the same machines that run ceph-osd? > >> >> > > > > > > I didn't know about this. I run this setup in production. :P > > > > Regards, > > > > Webert Lima > > DevOps Engineer at MAV Tecnologia > > Belo Horizonte - Brasil > > IRC NICK - WebertRLZ > > > > _______________________________________________ > > ceph-users mailing list > > [email protected] > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > _______________________________________________ > > ceph-users mailing list > > [email protected] > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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