[Gluster-users] Strange behaviour in AFR - directory read only from first brick?

[baggio liu]

Hi,
   A file can't "ls " ,but can "less ".
   I think this action is a little weird. If this action can not be
supported, an error may be
more friendly.


Baggio


2008/7/4 Anand Avati <avati at zresearch.com>:

> this case is considered equal to 'altering the backend without the mount
> point'. currently it is an unsupported 'action'.
>
> avati
>
>
> On 03/07/2008, Arnulf Heimsbakk <arnulf.heimsbakk at gmail.com> wrote:
>>
>> Hi,
>>
>> I find GlusterFS as a refreshing alternative to traditional cluster
>> file systems. I have currently experimented with unify and AFR. When
>> experimenting with AFR with two bricks I found a strange behaviour. It
>> seems that the directory is only read from the first brick.
>>
>> I created two bricks and run client side AFR. In the client config the
>> bricks is represented as follows:
>>
>> subvolumes brick1 brick2
>>
>> Then I simulated a crash with loss of files.
>>
>> 1. AFR is up
>> 2. touch file f1
>> 3. brick1 crashes
>> 4. ls on mount point, f1 exists and everything is normal (ls read from
>> brick2)
>> 5. file system repair removes f1 from brick1
>> 6. gclusterfsd start on brick1
>> 7. ls on mount point does not show f1 anymore (ls read only from brick1?)
>> 8. cat f1 on mount point replicates file and it becomes visible
>>
>> I have replicated this error a numerous times. Every time i have
>> removed user_xattr from the exported directories.
>>
>> GlusterFS version 1.3.8
>> XFS backend filesystem
>> Debian Etch i686
>>
>> Is there a fix for this behaviour or is there a configuration solution
>> which eliminates this problem?
>> Or is this problem considered to be a split brain case?
>> Does this affect AFRd namespaces (i did not test that)?
>>
>> Arnulf Heimsbakk
>> Sysadmin @ Norwegian Meteorological Institute
>>
>> --
>> "When all else fails, read the instructions." ~ L. Iasellio
>>
>> _______________________________________________
>> Gluster-users mailing list
>> Gluster-users at gluster.org
>> http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users
>>
>
>
>
> --
> If I traveled to the end of the rainbow
> As Dame Fortune did intend,
> Murphy would be there to tell me
> The pot's at the other end.
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