On 10/30/2013 09:10 PM, Brian Cipriano wrote: > I had the exact same experience recently with a 3.4 distributed > cluster I set up. I spent some time on the IRC but couldn?t track it > down. Seems remove-brick is broken in 3.3 and 3.4. I guess folks don?t > remove bricks very often :) > > - brian > Brian, I have tried remove brick couple of times and it worked for me. From your experiance it seems remove brick has a bug. I will suggest you to file a bug or give us steps to reproduce , so that I can reproduce it in my environment and file a bug for it. > > > > On Oct 30, 2013, at 11:21 AM, Lalatendu Mohanty <lmohanty at redhat.com > <mailto:lmohanty at redhat.com>> wrote: > >> On 10/30/2013 08:40 PM, Lalatendu Mohanty wrote: >>> On 10/30/2013 03:43 PM, B.K.Raghuram wrote: >>>> I have gluster 3.4.1 on 4 boxes with hostnames n9, n10, n11, n12. I >>>> did the following sequence of steps and ended up with losing data so >>>> what did I do wrong?! >>>> >>>> - Create a distributed volume with bricks on n9 and n10 >>>> - Started the volume >>>> - NFS mounted the volume and created 100 files on it. Found that n9 >>>> had 45, n10 had 55 >>>> - Added a brick n11 to this volume >>>> - Removed a brick n10 from the volume with gluster remove brick <vol> >>>> <n10 brick name> start >>>> - n9 now has 45 files, n10 has 55 files and n11 has 45 files(all the >>>> same as on n9) >>>> - Checked status, it shows that no rebalanced files but that n10 had >>>> scanned 100 files and completed. 0 scanned for all the others >>>> - I then did a rebalance start force on the vol and found that n9 had >>>> 0 files, n10 had 55 files and n11 had 45 files - weird - looked like >>>> n9 had been removed but double checked again and found that n10 had >>>> indeed been removed. >>>> - did a remove-brick commit. Now same file distribution after that. >>>> volume info now shows the volume to have n9 and n11 and bricks. >>>> - did a rebalance start again on the volume. The rebalance-status now >>>> shows n11 had 45 rebalanced files, all the brick nodes had 45 files >>>> scanned and all show complete. The file layout after this is n9 has 45 >>>> files and n10 has 55 files. n11 has 0 files! >>>> - An ls on the nfs mount now shows only 45 files so the other 55 not >>>> visible because they are on n10 which is not part of the volume! >>>> >>>> What have I done wrong in this sequence? >>>> _______________________________________________ >>>> Gluster-users mailing list >>>> Gluster-users at gluster.org >>>> http://supercolony.gluster.org/mailman/listinfo/gluster-users >>> | >>> I think running rebalnce (force) in between "remove brick start" and >>> "remove brick commit" is the issue. Can you please paste your >>> command as per the time line of events. That would make it more clear. >>> >>> Below are the steps, I do to replace a brick and it works for me. >>> >>> | >>> >>> 1. |gluster volume add-brick /|VOLNAME NEW-BRICK|/| >>> 2. |gluster volume remove-brick |VOLNAME|/|BRICK|/| |start| >>> 3. |gluster volume remove-brick |VOLNAME|/|BRICK|/||status| >>> 4. |gluster volume remove-brick |VOLNAME /BRICK/| commit| >>> >> I will also suggest you to use distribute-replicate volumes, so that >> you have a replica copy always and it reduces the probability of >> losing data. >> >> -Lala >> >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org <mailto:Gluster-users at gluster.org> >> http://supercolony.gluster.org/mailman/listinfo/gluster-users > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://supercolony.gluster.org/pipermail/gluster-users/attachments/20131030/8abbd62a/attachment.html>
