[Gluster-users] Self heal doesn't seem to work when file is updated

[Mohit Anchlia]

Can you please let me know the cases so that I can get started with
the script? Or if you are already planning on doing it then can you
please let me know?

Self healing seems to be of concern for majority of people and for me
too. So atleast having some kind of monitoring will help reduce that
concern :)


On Mon, Mar 14, 2011 at 2:44 PM, Mohit Anchlia <mohitanchlia at gmail.com> wrote:
> Thanks for this additional info. It really helps!
>
> If you give me the scenarios I can come up with the script and send it
> to this user group. So far I have:
>
> 1. Different afr on node that was receiving updated
> 2. Different gfid. Only way is to compare gfid is to run getfattr on
> every replica node.
>
> BTW: I noticed that getfattr <mount>/file also heals. Don't understand
> why but it does :)
>
> On Fri, Mar 11, 2011 at 5:59 PM, Pranith Kumar. Karampuri
> <pranithk at gluster.com> wrote:
>> hi Mohit,
>>     I have sent a patch for the bug you have raised for self-heal not working in one case already.
>>
>> For a file, it should have either different extended attributes for client-0/1 (assuming two replica) and same gfid extended attribute.
>> or different extended attribute for gfid.
>> example:
>> pranith @ /mnt/client
>> 07:24:05 :) $ sudo getfattr -d -m "trusted*" /tmp/1/file1
>> getfattr: Removing leading '/' from absolute path names
>> # file: tmp/1/file1
>> trusted.afr.vol-client-0=0sAAAAAAAAAAAAAAAA
>> trusted.afr.vol-client-1=0sTwAAAgAAAAAAAAAA
>> trusted.gfid=0s9JoVEu1WQQCykafEGcz74Q==
>>
>> pranith @ /mnt/client
>> 07:24:34 :) $ sudo getfattr -d -m "trusted*" /tmp/2/file1
>> getfattr: Removing leading '/' from absolute path names
>> # file: tmp/2/file1
>> trusted.afr.vol-client-0=0sAAAAAAAAAAAAAAAA
>> trusted.afr.vol-client-1=0sAAAAAAAAAAAAAAAA
>> trusted.gfid=0s9JoVEu1WQQCykafEGcz74Q==
>>
>> After self-heal completes they become:
>> pranith @ /mnt/client
>> 07:27:21 :) $ sudo getfattr -d -m "trusted*" /tmp/1/file1
>> getfattr: Removing leading '/' from absolute path names
>> # file: tmp/1/file1
>> trusted.afr.vol-client-0=0sAAAAAAAAAAAAAAAA
>> trusted.afr.vol-client-1=0sAAAAAAAAAAAAAAAA
>> trusted.gfid=0s9JoVEu1WQQCykafEGcz74Q==
>>
>>
>> pranith @ /mnt/client
>> 07:27:26 :) $ sudo getfattr -d -m "trusted*" /tmp/2/file1
>> getfattr: Removing leading '/' from absolute path names
>> # file: tmp/2/file1
>> trusted.afr.vol-client-0=0sAAAAAAAAAAAAAAAA
>> trusted.afr.vol-client-1=0sAAAAAAAAAAAAAAAA
>> trusted.gfid=0s9JoVEu1WQQCykafEGcz74Q==
>>
>> Thanks
>> Pranith.
>> ----- Original Message -----
>> From: "Mohit Anchlia" <mohitanchlia at gmail.com>
>> To: gluster-users at gluster.org
>> Sent: Saturday, March 12, 2011 4:31:16 AM
>> Subject: Re: [Gluster-users] Self heal doesn't seem to work when file is        updated
>>
>> Can somone from gluster developer community please tell respond how to
>> find if self heal worked?
>>
>> Or better yet how to determine if a file needs to be healed? Please
>> let me know as this very important aspect.
>>
>> On Thu, Mar 10, 2011 at 9:54 AM, William L. Sebok <wls at astro.umd.edu> wrote:
>>> It also won't work well when the bricks are under use and might be changing.
>>>
>>> Bill Sebok      Computer Software Manager, Univ. of Maryland, Astronomy
>>>        Internet: wls at astro.umd.edu     URL: http://furo.astro.umd.edu/
>>>
>>> On Thu, Mar 10, 2011 at 09:39:44AM -0800, Mohit Anchlia wrote:
>>>> It doesn't look like a good way of checking when it involves millions
>>>> of files and something you don't want to run every now and then. I was
>>>> expecting something from gluster commands to straight away provide
>>>> that info. Something that can then be monitored continuously. It's
>>>> very important to have right version of files in production and only
>>>> gluster knows which were healed.
>>>>
>>>> On Thu, Mar 10, 2011 at 1:40 AM, Marcus Bointon
>>>> <marcus at synchromedia.co.uk> wrote:
>>>> > On 9 Mar 2011, at 20:08, Mohit Anchlia wrote:
>>>> >
>>>> >> Asking my question again since it's very important to know how to find
>>>> >> out if self healing worked.
>>>> >
>>>> > Do an rsync with dry-run option on the back-end stores? They should be identical.
>>>> >
>>>> > Marcus
>>>
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>