I like to avoid adding disks from more than 1 failure domain at a time in case some of the new disks are bad. In your example of only adding 1 new node, I would say that adding all of the disks at the same time is the better way to do it.
Adding only 1 disk in the new node at a time would actually be worse for the balance of the cluster as it would only have 1 disk while the rest have all 5 or more. The EC profile shouldn't play into account as you already have enough hosts to fulfill it. On Sun, Dec 17, 2017, 11:57 AM Karun Josy <karunjo...@gmail.com> wrote: > Hi, > > We have a live cluster with 8 OSD nodes all having 5-6 disks each. > > We would like to add a new host and expand the cluster. > > We have 4 pools > - 3 replicated pools with replication factor 5 and 3 > - 1 erasure coded pool with k=5, m=3 > > So my concern is, is there any precautions that are needed to add the new > host since the ec profile is 5+3. > > And can we add multiple disks at the same time in the new host ? Or should > it be 1 at a time ? > > > > Karun > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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