[Gluster-users] 3.7.13, index healing broken?

[Dmitry Melekhov]

13.07.2016 01:52, Anuradha Talur пишет:
>
> ----- Original Message -----
>> From: "Dmitry Melekhov" <dm at belkam.com>
>> To: "Pranith Kumar Karampuri" <pkarampu at redhat.com>
>> Cc: "gluster-users" <gluster-users at gluster.org>
>> Sent: Tuesday, July 12, 2016 9:27:17 PM
>> Subject: Re: [Gluster-users] 3.7.13, index healing broken?
>>
>>
>>
>> 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.
>>
> If you are setting the file length to 0 on one of the bricks (looks like
> that is the case), it is not a bug.
>
> Index heal relies on failures seen from the mount point(s)
> to identify the files that need heal. It won't be able to recognize any file
> modification done directly on bricks. Same goes for heal info command which
> is the reason heal info also shows 0 entries.

Well, this makes self-heal useless then- if any file is accidently 
corrupted or deleted (yes! if file is deleted directly from brick this 
is no recognized by idex heal too), then it will not be self-healed, 
because self-heal uses index heal.

>
> Heal full on the other hand will individually compare certain aspects of all
> files/dir to identify files to be healed. This is why heal full works in this case
> but index heal doesn't.
OK, thank yo for explanation, but , once again how about self-healing 
and data consistency?
And, if I access this deleted or broken file from client then it will be 
healed, I guess this is what self-heal needs to do.

Thank you!

>>
>>
>>
>> On Tue, Jul 12, 2016 at 3:09 PM, Dmitry Melekhov < 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 > 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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>>
>>
>>
>> --
>> Pranith
>>
>>
>>
>>
>> --
>> Pranith
>>
>>
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