[Gluster-users] ... i was able to produce a split brain...

[Ml Ml]

Hello Ravi,

thanks a lot for your reply.

The Data on ovirt-node03 is the one which i want.

Here are the infos collected by following the howto:
https://github.com/GlusterFS/glusterfs/blob/master/doc/debugging/split-brain.md



[root at ovirt-node03 ~]# gluster volume heal RaidVolB info split-brain
Gathering list of split brain entries on volume RaidVolB has been successful

Brick ovirt-node03.example.local:/raidvol/volb/brick
Number of entries: 0

Brick ovirt-node04.example.local:/raidvol/volb/brick
Number of entries: 14
at                    path on brick
-----------------------------------
2015-01-27 17:33:00 <gfid:1c15d0cb-1cca-4627-841c-395f7b712f73>
2015-01-27 17:34:01 <gfid:1c15d0cb-1cca-4627-841c-395f7b712f73>
2015-01-27 17:35:04 <gfid:1c15d0cb-1cca-4627-841c-395f7b712f73>
2015-01-27 17:36:05 <gfid:cd411b57-6078-4f3c-80d1-0ac1455186a6>/ids
2015-01-27 17:37:06 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:37:07 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:38:08 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:38:21 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:39:22 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:40:23 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:41:24 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:42:25 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:43:26 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
2015-01-27 17:44:27 /1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids

[root at ovirt-node03 ~]# gluster volume heal RaidVolB info
Brick ovirt-node03.example.local:/raidvol/volb/brick/
Number of entries: 0

Brick ovirt-node04.example.local:/raidvol/volb/brick/
Number of entries: 0


[root at ovirt-node03 ~]# getfattr -d -m . -e hex
/raidvol/volb/brick/1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
getfattr: Removing leading '/' from absolute path names
# file: raidvol/volb/brick/1701d5ae-6a44-4374-8b29-61c699da870b/dom_md/ids
trusted.afr.RaidVolB-client-0=0x000000000000000000000000
trusted.afr.RaidVolB-client-1=0x000000000000000000000000
trusted.afr.dirty=0x000000000000000000000000
trusted.gfid=0x1c15d0cb1cca4627841c395f7b712f73


The "Resetting the relevant changelogs to resolve the split-brain: "
part of the howto is now a little complictaed. Do i have a data or
meta split brain now?
I guess i have a data split brain in my case, right?

What are my next setfattr commands nowin my case if i want to keep the
data from node03?

Thanks a lot!

Mario


On Wed, Jan 28, 2015 at 9:44 AM, Ravishankar N <ravishankar at redhat.com> wrote:
>
> On 01/28/2015 02:02 PM, Ml Ml wrote:
>>
>> I want to either take the file from node03 or node04. i really don’t
>> >mind. Can i not just tell gluster that it should use one node as the
>> >„current“ one?
>
> Policy based split-brain resolution [1] which does just that, has been
> merged in master and should be available in glusterfs 3.7.
> For the moment, you would have to modify the xattrs on the one of the bricks
> and trigger heal. You can see
> https://github.com/GlusterFS/glusterfs/blob/master/doc/debugging/split-brain.md
> on how to do it.
>
> Hope this helps,
> Ravi
>
> [1] http://review.gluster.org/#/c/9377/
>