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

[Pranith Kumar. Karampuri]

Mohit,
    The algorithm has few more cases. I am thinking along the lines of providing a script/cmd. I am not sure how much time it may take with the bandwidth I have now. one correction in the prev mail. The extended attributes for client-0/1 should be other than 0sAAAAAAAAAAAAAAAA if it needs self-heal.

Pranith.
----- Original Message -----
From: "Pranith Kumar. Karampuri" <pranithk at gluster.com>
To: "Mohit Anchlia" <mohitanchlia at gmail.com>
Cc: gluster-users at gluster.org
Sent: Saturday, March 12, 2011 7:29:58 AM
Subject: Re: [Gluster-users] Self heal doesn't seem to work when file	is	updated

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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