Hi, Thanks for responding? If split-brain happen in such kind of test is reasonable, how to fix this split-brain situation?
From: Ravishankar N [mailto:[email protected]] Sent: Thursday, February 08, 2018 12:12 AM To: Zhou, Cynthia (NSB - CN/Hangzhou) <[email protected]>; [email protected] Subject: Re: query about a split-brain problem found in glusterfs3.12.3 On 02/07/2018 10:39 AM, Zhou, Cynthia (NSB - CN/Hangzhou) wrote: Hi glusterfs expert: Good day. Lately, we meet a glusterfs split brain problem in our env in /mnt/export/testdir. We start 3 ior process (IOR tool) from non-sn nodes, which is creating/removing files repeatedly in testdir. then we reboot sn nodes(sn0 and sn1) by sequence. Then we meet following problem. Do you have some comments on how this could happen? And how to fix it in this situation? Thanks! Is the problem that split-brain is happening? Is this a replica 2 volume? If yes, then it looks like it is expected behavior? Regards Ravi gluster volume heal export info Brick sn-0.local:/mnt/bricks/export/brick Status: Connected Number of entries: 0 Brick sn-1.local:/mnt/bricks/export/brick /testdir - Is in split-brain /testdir - Possibly undergoing heal Status: Connected Number of entries: 2 wait for a while ..... gluster volume heal export info Brick sn-0.local:/mnt/bricks/export/brick Status: Connected Number of entries: 0 Brick sn-1.local:/mnt/bricks/export/brick /testdir - Possibly undergoing heal /testdir - Possibly undergoing heal and finally: [root@sn-0:/root<http://sn-0/root>] # gluster v heal export info Brick sn-0.local:/mnt/bricks/export/brick<http://local/mnt/bricks/export/brick> Status: Connected Number of entries: 0 Brick sn-1.local:/mnt/bricks/export/brick<http://local/mnt/bricks/export/brick> /testdir - Is in split-brain Status: Connected Number of entries: 1 [root@sn-0:/root<http://sn-0/root>] # getfattr -m .* -d -e hex /mnt/bricks/export/brick/testdir getfattr: Removing leading '/' from absolute path names # file: mnt/bricks/export/brick/testdir trusted.gfid=0x5622cff893b3484dbdb6a20a0edb0e77 trusted.glusterfs.dht=0x000000010000000000000000ffffffff [root@sn-1:/root<http://sn-1/root>] # getfattr -m .* -d -e hex /mnt/bricks/export/brick/testdir getfattr: Removing leading '/' from absolute path names # file: mnt/bricks/export/brick/testdir trusted.afr.dirty=0x000000000000000000000001 trusted.afr.export-client-0=0x000000000000000000000038 trusted.gfid=0x5622cff893b3484dbdb6a20a0edb0e77 trusted.glusterfs.dht=0x000000010000000000000000ffffffff
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