Robert thanks for the info! How can I find out and modify when is scheduled the next deep scrub, the number of backfill processes and their priority?
Best regards, George ---- Ο χρήστης Robert LeBlanc έγραψε ---- >You just need to change your rule from > >step chooseleaf firstn 0 type osd > >to > >step chooseleaf firstn 0 type host > >There will be data movement as it will want to move about half the >objects to the new host. There will be data generation as you move >from size 1 to size 2. As far as I know a deep scrub won't happen >until the next scheduled time. The time to do all of this is dependent >on your disk speed, network speed, CPU and RAM capacity as well as the >number of backfill processes configured, the priority of the backfill >process, how active your disks are and how much data you have stored >in the cluster. In short ... it depends. > >On Mon, Mar 23, 2015 at 4:30 PM, Georgios Dimitrakakis ><[email protected]> wrote: >> Hi all! >> >> I had a CEPH Cluster with 10x OSDs all of them in one node. >> >> Since the cluster was built from the beginning with just one OSDs node the >> crushmap had as a default >> the replication to be on OSDs. >> >> Here is the relevant part from my crushmap: >> >> >> # rules >> rule replicated_ruleset { >> ruleset 0 >> type replicated >> min_size 1 >> max_size 10 >> step take default >> step chooseleaf firstn 0 type osd >> step emit >> } >> >> # end crush map >> >> >> I have added a new node with 10x more identical OSDs thus the total OSDs >> nodes are now two. >> >> I have changed the replication factor to be 2 on all pools and I would like >> to make sure that >> I always keep each copy on a different node. >> >> In order to do so do I have to change the CRUSH map? >> >> Which part should I change? >> >> >> After modifying the CRUSH map what procedure will take place before the >> cluster is ready again? >> >> Is it going to start re-balancing and moving data around? Will a deep-scrub >> follow? >> >> Does the time of the procedure depends on anything else except the amount of >> data and the available connection (bandwidth)? >> >> >> Looking forward for your answers! >> >> >> All the best, >> >> >> George >> >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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