Hi, I upgraded Luster from 2.12.8 to 2.15.5 (server and clients). After upgrade, I found that all Lustre pools disappeared. There were 2 pools: - cluster.ssh - cluster.hdd
[root@mds1 ~]# lctl pool_list cluster Pools from cluster: [root@mds1 ~]# lctl pool_list cluster.ssd Pool: cluster.ssd lctl pool_list: cannot open /proc/fs/lustre/lov/cluster-MDT0000-mdtlov/pools/ssd: No such file or directory (2) [root@mds1 ~]# ls -la /proc/fs/lustre/lov/cluster-MDT0000-mdtlov/pools/ total 0 dr-xr-xr-x 2 root root 0 Aug 1 10:49 . dr-xr-xr-x 4 root root 0 Aug 1 10:49 .. On the client side "lfs getstripe" still shows pool names. [root@login2 ~]# lfs getstripe /cluster . . . /cluster/home stripe_count: 1 stripe_size: 1048576 pattern: raid0 stripe_offset: -1 pool: hdd /cluster/apps stripe_count: 1 stripe_size: 1048576 pattern: raid0 stripe_offset: -1 pool: ssd I created pools again: [root@mds1 ~]# lctl pool_new cluster.ssd Pool cluster.ssd created [root@mds1 ~]# lctl pool_add cluster.ssd OST[0-3] Warning, OST cluster-OST0000_UUID not found in pool cluster.ssd OST cluster-OST0001_UUID added to pool cluster.ssd . . . Adding OSTs to the pool shows a warings message "OST ... not found in pool ..." sometimes. Question 1: Is it expected behavior that pools disappeared after the Luster upgrade? Question 2: Is it safe to ignore warning messages "OST ... not found in pool ..." when adding OST to the pool. Best regards, Pavlo Khmel
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