If correctly configured, your cluster should have zero downtime from a single OSD or node failure. What is your crush map? Are you using replica or EC? If your 'min_size' is not smaller than 'size', then you will lose availability. On Thu, Nov 28, 2019 at 10:50 PM Peng Bo <pengbo@xxxxxxxxxxx> wrote: > > Hi all, > > We are working on use CEPH to build our HA system, the purpose is the system should always provide service even a node of CEPH is down or OSD is lost. > > Currently, as we practiced once a node/OSD is down, the CEPH cluster needs to take about 40 seconds to sync data, our system can't provide service during that. > > My questions: > > Does there have any way that we can reduce the data sync time? > How can we let the CEPH keeps available once a node/OSD is down? > > > BR > > -- > The modern Unified Communications provider > > https://www.portsip.com > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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