Behaviour is same even after setting min_size 2. On Mon 18 May, 2020, 12:34 PM Eugen Block, <eblock@xxxxxx> wrote: > If your pool has a min_size 2 and size 2 (always a bad idea) it will > pause IO in case of a failure until the recovery has finished. So the > described behaviour is expected. > > > Zitat von Amudhan P <amudhan83@xxxxxxxxx>: > > > Hi, > > > > Crush rule is "replicated" and min_size 2 actually. I am trying to test > > multiple volume configs in a single filesystem > > using file layout. > > > > I have created metadata pool with rep 3 (min_size2 and replicated crush > > rule) and data pool with rep 3 (min_size2 and replicated crush rule). > and > > also I have created multiple (replica 2, ec2-1 & ec4-2) pools and added > to > > the filesystem. > > > > Using file layout I have set different data pool to a different folders. > so > > I can test different configs in the same filesystem. all data pools > > min_size set to handle single node failure. > > > > Single node failure is handled properly when only having metadata pool > and > > one data pool (rep3). > > > > After adding additional data pool to fs, single node failure scenario is > > not working. > > > > regards > > Amudhan P > > > > On Sun, May 17, 2020 at 1:29 AM Eugen Block <eblock@xxxxxx> wrote: > > > >> What’s your pool configuration wrt min_size and crush rules? > >> > >> > >> Zitat von Amudhan P <amudhan83@xxxxxxxxx>: > >> > >> > Hi, > >> > > >> > I am using ceph Nautilus cluster with below configuration. > >> > > >> > 3 node's (Ubuntu 18.04) each has 12 OSD's, and mds, mon and mgr are > >> running > >> > in shared mode. > >> > > >> > The client mounted through ceph kernel client. > >> > > >> > I was trying to emulate a node failure when a write and read were > going > >> on > >> > (replica2) pool. > >> > > >> > I was expecting read and write continue after a small pause due to a > Node > >> > failure but it halts and never resumes until the failed node is up. > >> > > >> > I remember I tested the same scenario before in ceph mimic where it > >> > continued IO after a small pause. > >> > > >> > regards > >> > Amudhan P > >> > _______________________________________________ > >> > 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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