dear all，
Recently, I have a test to rebalance, I seem to be a bug.
I used the cluster version is v3.6.2 tag.
The case I did is below.
1. create a volume with dht number 2
2. write a few files in the volume
3. add-brick to the volume
4. rebalance fix-layout
5. find a file which would be rebalance to other brick
6. continuing write something to the file
7. exec the rebalance to move file to where they should be
After the rebalance, we saw something has been lost when it were write during the rebalance.
Could anyone help me with it?
On May 14, 2015, at 8:00 PM, gluster-devel-request@xxxxxxxxxxx wrote:
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Today's Topics:
1. Re: Rebalance failure wrt trashcan (Nithya Balachandran)
----------------------------------------------------------------------
Message: 1
Date: Thu, 14 May 2015 07:08:46 -0400 (EDT)
From: Nithya Balachandran <nbalacha@xxxxxxxxxx>
To: SATHEESARAN <sasundar@xxxxxxxxxx>
Cc: Gluster Devel <gluster-devel@xxxxxxxxxxx>
Subject: Re: Rebalance failure wrt trashcan
Message-ID:
<786595040.14130930.1431601726039.JavaMail.zimbra@xxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
The rebalance failure is due to the interaction of the lookup-unhashed changes and rebalance local crawl changes. I will send a patch shortly.
Regards,
Nithya
----- SATHEESARAN <sasundar@xxxxxxxxxx> wrote:
On 05/14/2015 12:55 PM, Vijay Bellur wrote:
On 05/14/2015 09:00 AM, SATHEESARAN wrote:
Hi All,
I was using glusterfs-3.7 beta2 build (
glusterfs-3.7.0beta2-0.0.el6.x86_64 )
I have seen rebalance failure in one of the node.
[2015-05-14 12:17:03.695156] E
[dht-rebalance.c:2368:gf_defrag_settle_hash] 0-vmstore-dht: fix layout
on /.trashcan/internal_op failed
[2015-05-14 12:17:03.695636] E [MSGID: 109016]
[dht-rebalance.c:2528:gf_defrag_fix_layout] 0-vmstore-dht: Fix layout
failed for /.trashcan
Does it have any impact ?
I don't think there should be any impact due to this. rebalance should
continue fine without any problems. Do let us know if you observe the
behavior to be otherwise.
-Vijay
I tested the same functionally and I don't find any impact as such, but
the 'gluster volume status <vol-name>' reports the rebalance as a FAILURE.
Any tool ( for example oVirt ), consuming the output from 'gluster
volume status <vol> --xml' would report the rebalance operation as FAILURE
[root@ ~]# gluster volume rebalance vmstore start
volume rebalance: vmstore: success: Rebalance on vmstore has been
started successfully. Use rebalance status command to check status of
the rebalance process.
ID: 68a12fc9-acd5-4f24-ba2d-bfc070ad5668
[root@~]# gluster volume rebalance vmstore status
Node Rebalanced-files size
scanned failures skipped status run time in secs
--------- ----------- -----------
----------- ----------- ----------- ------------ --------------
localhost 0
0Bytes 2 0 0 completed
0.00
10.70.37.58 0
0Bytes 0 3 0 failed 0.00
volume rebalance: vmstore: success:
[root@~]# gluster volume status vmstore
Status of volume: vmstore
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
......
Task Status of Volume vmstore
------------------------------------------------------------------------------
Task : Rebalance
ID : 68a12fc9-acd5-4f24-ba2d-bfc070ad5668
Status : failed
Snip from --xml tasks :
<tasks>
<task>
<type>Rebalance</type>
<id>68a12fc9-acd5-4f24-ba2d-bfc070ad5668</id>
<status>4</status>
<statusStr>failed</statusStr>
</task>
</tasks>
Even this is the case with remove-brick with data migration too
-- sas
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