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, [email protected] wrote:
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> 1. Re: Rebalance failure wrt trashcan (Nithya Balachandran)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 14 May 2015 07:08:46 -0400 (EDT)
> From: Nithya Balachandran <[email protected]>
> To: SATHEESARAN <[email protected]>
> Cc: Gluster Devel <[email protected]>
> Subject: Re: [Gluster-devel] Rebalance failure wrt trashcan
> Message-ID:
> <[email protected]>
> 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 <[email protected]> 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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