[Gluster-users] 3.7.13, index healing broken?

[Dmitry Melekhov]

13.07.2016 07:46, Pranith Kumar Karampuri пишет:
>
>
> On Tue, Jul 12, 2016 at 9:27 PM, Dmitry Melekhov <dm at belkam.com 
> <mailto:dm at belkam.com>> wrote:
>
>
>
>     12.07.2016 17:39, Pranith Kumar Karampuri пишет:
>>     Wow, what are the steps to recreate the problem?
>
>     just set file length to zero, always reproducible.
>
>
> Changing things on the brick i.e. not from gluster volume mount is not 
> something you want to do. In the worst case(I have seen this only once 
> in the last 5 years though) where you do this it can lead to data loss 
> also. So please be aware of it.

Data replication with gluster is a way to avoid data loss, right? Or no? 
If not- why use gluster then?
I though that gluster self-healing will heal or at least report missed 
files or files with wrong lenths- i.e. corruptions visible just by 
reading brick's directory,
not comparing data as bit rot detection...
If this is not a bug, then gluster is not what I expected :-(

Thank you!
>
>
>
>>
>>     On Tue, Jul 12, 2016 at 3:09 PM, Dmitry Melekhov <dm at belkam.com
>>     <mailto:dm at belkam.com>> wrote:
>>
>>         12.07.2016 13:33, Pranith Kumar Karampuri пишет:
>>>         What was "gluster volume heal <volname> info" showing when
>>>         you saw this issue?
>>
>>         just reproduced :
>>
>>
>>         [root at father brick]# > gstatus-0.64-3.el7.x86_64.rpm
>>
>>         [root at father brick]# gluster volume heal pool
>>         Launching heal operation to perform index self heal on volume
>>         pool has been successful
>>         Use heal info commands to check status
>>         [root at father brick]# gluster volume heal pool info
>>         Brick father:/wall/pool/brick
>>         Status: Connected
>>         Number of entries: 0
>>
>>         Brick son:/wall/pool/brick
>>         Status: Connected
>>         Number of entries: 0
>>
>>         Brick spirit:/wall/pool/brick
>>         Status: Connected
>>         Number of entries: 0
>>
>>         [root at father brick]#
>>
>>
>>
>>>
>>>         On Mon, Jul 11, 2016 at 3:28 PM, Dmitry Melekhov
>>>         <dm at belkam.com <mailto:dm at belkam.com>> wrote:
>>>
>>>             Hello!
>>>
>>>             3.7.13, 3 bricks volume.
>>>
>>>             inside one of bricks:
>>>
>>>             [root at father brick]# ls -l gstatus-0.64-3.el7.x86_64.rpm
>>>             -rw-r--r-- 2 root root 52268 июл 11 13:00
>>>             gstatus-0.64-3.el7.x86_64.rpm
>>>             [root at father brick]#
>>>
>>>
>>>             [root at father brick]# > gstatus-0.64-3.el7.x86_64.rpm
>>>             [root at father brick]# ls -l gstatus-0.64-3.el7.x86_64.rpm
>>>             -rw-r--r-- 2 root root 0 июл 11 13:54
>>>             gstatus-0.64-3.el7.x86_64.rpm
>>>             [root at father brick]#
>>>
>>>             so now file has  0 length.
>>>
>>>             try to heal:
>>>
>>>
>>>
>>>             [root at father brick]# gluster volume heal pool
>>>             Launching heal operation to perform index self heal on
>>>             volume pool has been successful
>>>             Use heal info commands to check status
>>>             [root at father brick]# ls -l gstatus-0.64-3.el7.x86_64.rpm
>>>             -rw-r--r-- 2 root root 0 июл 11 13:54
>>>             gstatus-0.64-3.el7.x86_64.rpm
>>>             [root at father brick]#
>>>
>>>
>>>             nothing!
>>>
>>>             [root at father brick]# gluster volume heal pool full
>>>             Launching heal operation to perform full self heal on
>>>             volume pool has been successful
>>>             Use heal info commands to check status
>>>             [root at father brick]# ls -l gstatus-0.64-3.el7.x86_64.rpm
>>>             -rw-r--r-- 2 root root 52268 июл 11 13:00
>>>             gstatus-0.64-3.el7.x86_64.rpm
>>>             [root at father brick]#
>>>
>>>
>>>             full heal is OK.
>>>
>>>             But, self-heal is doing index heal according to
>>>
>>>             http://staged-gluster-docs.readthedocs.io/en/release3.7.0beta1/Developer-guide/afr-self-heal-daemon/
>>>
>>>             Is this bug?
>>>
>>>
>>>             As far as I remember it worked in 3.7.10....
>>>
>>>
>>>             _______________________________________________
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>>>             Gluster-users at gluster.org <mailto:Gluster-users at gluster.org>
>>>             http://www.gluster.org/mailman/listinfo/gluster-users
>>>
>>>
>>>
>>>
>>>         -- 
>>>         Pranith
>>
>>
>>
>>
>>     -- 
>>     Pranith
>
>
>
>
> -- 
> Pranith

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