On 02/20/2014 02:43 PM, William Kwan wrote:
Hi all,
Running glusterfs-3.4.2-1.el6.x86_6 on centos6.5
Due to some smart people screw up my network connection on the nodes
for don't know how long. I found that I have my GlusterFS volume in
split-brain. I googled and found different way to clean this. I need
some extra help on this.
# gluster volume heal kvm1 info split-brain
Gathering Heal info on volume kvm1 has been successful
Brick mgmt1:/gluster/brick1
Number of entries: 21
at path on brick
-----------------------------------
2014-02-20 22:33:41
/d058a735-0fca-430a-a3d7-cf0a77097e5d/images/714c56a8-db1d-42d5-bf76-869bd6c87eef/0ea0a280-4c2c-48ab-ad95-8cb48e6cf02b
2014-02-20 22:33:41
/d058a735-0fca-430a-a3d7-cf0a77097e5d/images/20b728b6-dd39-4d2e-a5c0-2dee22df6e95/a6a9b083-b04c-4ac8-86cb-ed4eb697c2c3
2014-02-20 22:33:41 /d058a735-0fca-430a-a3d7-cf0a77097e5d/dom_md/ids
... <truncated>
Brick mgmt2:/gluster/brick1
Number of entries: 28
at path on brick
-----------------------------------
2014-02-20 22:37:38 /d058a735-0fca-430a-a3d7-cf0a77097e5d/dom_md/ids
2014-02-20 22:37:38
/d058a735-0fca-430a-a3d7-cf0a77097e5d/images/714c56a8-db1d-42d5-bf76-869bd6c87eef/0ea0a280-4c2c-48ab-ad95-8cb48e6cf02b
2014-02-20 22:37:38
/d058a735-0fca-430a-a3d7-cf0a77097e5d/images/20b728b6-dd39-4d2e-a5c0-2dee22df6e95/a6a9b083-b04c-4ac8-86cb-ed4eb697c2c3
2014-02-20 22:27:38 /d058a735-0fca-430a-a3d7-cf0a77097e5d/dom_md/ids
2014-02-20 22:27:38 /d058a735-0fca-430a-a3d7-cf0
... <truncated>
1. what's the best way?
Here's the write-up I did about split-brain:
http://joejulian.name/blog/fixing-split-brain-with-glusterfs-33/
2.gluster volume heal doesnt' really save this, right?
No, the nature of split-brain is such that there is no automated way to
recover from it.
3. kind of shooting from the dark as I can't see the data content. The
volume is holding VM images. Picking the latest copies should be good?
That does seem a reasonably safe assumption, especially if your vm's are
cattle instead of kittens
<http://etherealmind.com/cattle-vs-kittens-on-cloud-platforms-no-one-hears-the-kittens-dying/>.
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