From: "Alessandro Ipe" <Alessandro.Ipe@xxxxxxxx>
To: "Krutika Dhananjay" <kdhananj@xxxxxxxxxx>
Cc: gluster-users@xxxxxxxxxxx
Sent: Thursday, March 12, 2015 5:15:08 PM
Subject: Re: [Gluster-users] Input/output error when trying to access a file on clientHi,
Actually, my gluster volume is distribute-replicate so I should provide the attributes on all the bricks. Here they are:
1. # file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-0=0sAAAAAAAAAAAAAAAA
trusted.afr.md1-client-1=0sAAAAAAAAAAAAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAACqqqqq/////w==
2. # file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-0=0sAAAAAAAAAAAAAAAA
trusted.afr.md1-client-1=0sAAAAAAAAAAAAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAACqqqqq/////w==
3. # file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-2=0sAAAAAAAAAAAAAAAA
trusted.afr.md1-client-3=0sAAAAAAAAAAEAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAAAAAAAAVVVVVA==
4. # file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-2=0sAAAAAAAAAAEAAAAA
trusted.afr.md1-client-3=0sAAAAAAAAAAAAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAAAAAAAAVVVVVA==
5. # file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-4=0sAAAAAAAAAAAAAAAA
trusted.afr.md1-client-5=0sAAAAAAAAAAEAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAABVVVVVqqqqqQ==
6. # file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-4=0sAAAAAAAAAAEAAAAA
trusted.afr.md1-client-5=0sAAAAAAAAAAAAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAABVVVVVqqqqqQ==
so it seems in fact that there are discrepancies between 3-4 and 5-6 (replicate pairs).
A.
On Thursday 12 March 2015 11:33:00 Alessandro Ipe wrote:
Hi,
"gluster volume heal md1 info split-brain" returns approximatively 2000 files (already divided by 2
due to replicate volume). So manually repairing each split-brain is unfeasable. Before scripting some
procedure, I need to be sure that I will not harm further the gluster system.
Moreover, I noticed that the messages printed in the logs are all about directories,
e.g.
[2015-03-12 10:06:53.423856] E [afr-self-heal-common.c:233:afr_sh_print_split_brain_log] 0-md1-replicate-1: Unable to self-heal contents of '/root' (possible split-brain). Please delete the file from all but the preferred subvolume.- Pending matrix: [ [ 0 1 ] [ 1 0 ] ]
[2015-03-12 10:06:53.424005] E [afr-self-heal-common.c:233:afr_sh_print_split_brain_log] 0-md1-replicate-2: Unable to self-heal contents of '/root' (possible split-brain). Please delete the file from all but the preferred subvolume.- Pending matrix: [ [ 0 1 ] [ 1 0 ] ]
[2015-03-12 10:06:53.424110] E [afr-self-heal-common.c:2868:afr_log_self_heal_completion_status] 0-md1-replicate-1: metadata self heal failed, on /root
[2015-03-12 10:06:53.424290] E [afr-self-heal-common.c:2868:afr_log_self_heal_completion_status] 0-md1-replicate-2: metadata self heal failed, on /root
Getting the attributes of that directory on each brick gives me for the first
# file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-0=0sAAAAAAAAAAAAAAAA
trusted.afr.md1-client-1=0sAAAAAAAAAAAAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAACqqqqq/////w==
and for the second
# file: data/glusterfs/md1/brick1/root
trusted.afr.md1-client-0=0sAAAAAAAAAAAAAAAA
trusted.afr.md1-client-1=0sAAAAAAAAAAAAAAAA
trusted.gfid=0s3DmMvSq0QOyf7T1ZN2VPSw==
trusted.glusterfs.dht=0sAAAAAQAAAACqqqqq/////w==
so it seems that there are both rigorously identical. However, according to your split -brain tutorial,
none of them has 0x000000000000000000000000. What 0sAAAAAAAAAAAAAAAA means
in fact ?
Should I change both attributes on each directory to 0x000000000000000000000000 ?
Many thanks,
A.
On Wednesday 11 March 2015 08:02:56 Krutika Dhananjay wrote:
Hi,
Have you gone through https://github.com/gluster/glusterfs/blob/master/doc/debugging/split-brain.md ?
If not, could you go through that once and try the steps given there? Do let us know if something is not clear in the doc.
-Krutika
From: "Alessandro Ipe" <Alessandro.Ipe@xxxxxxxx>
To: gluster-users@xxxxxxxxxxx
Sent: Wednesday, March 11, 2015 4:54:09 PM
Subject: Re: Input/output error when trying to access a file on client
Well, it is even worse. Now when doing a "ls -R" on the volume results in a lot of
[2015-03-11 11:18:31.957505] E [afr-self-heal-common.c:233:afr_sh_print_split_brain_log] 0-md1-replicate-2: Unable to self-heal contents of '/library' (possible split-brain). Please delete the file from all but the preferred subvolume.- Pending matrix: [ [ 0 2 ] [ 1 0 ] ]
[2015-03-11 11:18:31.957692] E [afr-self-heal-common.c:2868:afr_log_self_heal_completion_status] 0-md1-replicate-2: metadata self heal failed, on /library
I am desperate...
A.
On Wednesday 11 March 2015 12:05:33 you wrote:
> Hi,
>
>
> When trying to access a file on a gluster client (through fuse), I get an
> "Input/output error" message.
>
> Getting the attributes for the file gives me for the first brick
> # file: data/glusterfs/md1/brick1/kvm/hail/hail_home.qcow2
> trusted.afr.md1-client-2=0sAAAAAAAAAAAAAAAA
> trusted.afr.md1-client-3=0sAAABdAAAAAAAAAAA
> trusted.gfid=0sOCFPGCdrQ9uyq2yTTPCKqQ==
>
> while for the second (replicate) brick
> # file: data/glusterfs/md1/brick1/kvm/hail/hail_home.qcow2
> trusted.afr.md1-client-2=0sAAABJAAAAAAAAAAA
> trusted.afr.md1-client-3=0sAAAAAAAAAAAAAAAA
> trusted.gfid=0sOCFPGCdrQ9uyq2yTTPCKqQ==
>
> It seems that I have a split-brain. How can I solve this issue by resetting
> the attributes, please ?
>
>
> Thanks,
>
>
> Alessandro.
>
> ==================
> gluster volume info md1
>
> Volume Name: md1
> Type: Distributed-Replicate
> Volume ID: 6da4b915-1def-4df4-a41c-2f3300ebf16b
> Status: Started
> Number of Bricks: 3 x 2 = 6
> Transport-type: tcp
> Bricks:
> Brick1: tsunami1:/data/glusterfs/md1/brick1
> Brick2: tsunami2:/data/glusterfs/md1/brick1
> Brick3: tsunami3:/data/glusterfs/md1/brick1
> Brick4: tsunami4:/data/glusterfs/md1/brick1
> Brick5: tsunami5:/data/glusterfs/md1/brick1
> Brick6: tsunami6:/data/glusterfs/md1/brick1
> Options Reconfigured:
> server.allow-insecure: on
> cluster.read-hash-mode: 2
> features.quota: off
> performance.write-behind: on
> performance.write-behind-window-size: 4MB
> performance.flush-behind: off
> performance.io-thread-count: 64
> performance.cache-size: 512MB
> nfs.disable: on
> cluster.lookup-unhashed: off
_______________________________________________
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--
Dr. Ir. Alessandro Ipe
Department of Observations Tel. +32 2 373 06 31
Remote Sensing from Space Fax. +32 2 374 67 88
Royal Meteorological Institute
Avenue Circulaire 3 Email:
B-1180 Brussels Belgium Alessandro.Ipe@xxxxxxxx
Web: http://gerb.oma.be
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