[Gluster-devel] AFR problem with 2.0rc4

Gordan Bobic gordan at bobich.net
Thu Mar 19 10:20:22 UTC 2009 

The subvolumes have to be listed in the same order on all nodes, because
that is the order of precedence and failover for lock servers. Could it be
that this was the reason why you were seing problems?

You can set the preferred read subvolume with "option read-subvolume", but
the order in which subvolumes are listed for AFR has to always be the same.

Gordan

On Thu, 19 Mar 2009 10:35:34 +0100, nicolas prochazka
<prochazka.nicolas at gmail.com> wrote:
> More ,
> In fact, I cannot say that's self healing work very well.
> I'm trying to cp some big file ( 10g ) . fewer is ok, but all of them
> are partially copied
> so on first server my file is 10g  ( ok ) but in the second = 8g : not
> ok   and synchro does not occur.
> I'm trying to umount without success, i 'm trying to set option
> favorite child to first server and umount, without success, and i 'im
> trying to delete on storage of server two , same problem, and this
> file is never seen now.
> 
> So , i change the config client :
> 
> subvolumes brick_10.98.98.2 brick_10.98.98.1   =>  subvolumes
> brick_10.98.98.1 brick_10.98.98.2
> 
> and now, client mount point see file ( that i remove on server two ) ,
> then self healing can begin.
> ( but the size in storage of server two keep 0 size , just the file is
> create .... )
> 
> So we say it seems have to be a lot of weird problem, first at all,
> why order in subvolumes is so important ?
> 
> Regards,
> Nicolas Prochazka
> 
> 
> 
> On Thu, Mar 19, 2009 at 9:58 AM, nicolas prochazka
> <prochazka.nicolas at gmail.com> wrote:
>> I'm trying last gluster from git,
>> bug is corrected, but there's seem to be a lot of weird comportment in
>> AFR mode.
>> If i down one of two server, clients does not respond to a ls, or
>> respond but with not all file, just one....
>> I'm trying with and without lock server to 2 , 1 or 0  , results are
the
>> same.
>>
>> Regards,
>> Nicolas Prochazka
>>
>> On Wed, Mar 18, 2009 at 9:33 AM, Amar Tumballi <amar at gluster.com> wrote:
>>> Hi Nicolas,
>>>  Sure, We are in the process of internal testing. It should be out as
>>> release soon. Meanwhile, you can pull from git and test it out.
>>>
>>> Regards,
>>>
>>> On Wed, Mar 18, 2009 at 1:30 AM, nicolas prochazka
>>> <prochazka.nicolas at gmail.com> wrote:
>>>>
>>>> Hello,
>>>> I see in git tree correction of afr heal bug ,
>>>> can wa test this release, is stable enough in compare rc release ?
>>>> nicolas
>>>>
>>>> On Tue, Mar 17, 2009 at 9:39 PM, nicolas prochazka
>>>> <prochazka.nicolas at gmail.com> wrote:
>>>> > My test is :
>>>> > Set two server in AFR mode
>>>> > copy file to mount point ( /mnt/vdisk ) :  ok  , synchro is ok on
>>>> > two
>>>> > server.
>>>> > Then delete (rm ) all file from storage on server 1 (
>>>> > /mnt/disks/export
>>>> > )
>>>> > then wait for synchronisation.
>>>> > with rc2 and rc4  => file with good size ( ls -l) but nothing here
(
>>>> > df -b shows no disk usage ) and files are corrupt
>>>> > with rc1 : all is ok, server resynchro perfectly., i think is the
>>>> > right
>>>> > way ;)
>>>> >
>>>> > nicoals
>>>> >
>>>> > On Tue, Mar 17, 2009 at 6:49 PM, Amar Tumballi <amar at gluster.com>
>>>> > wrote:
>>>> >> Hi Nicolas,
>>>> >>  When you mean you 'add' a server here, you are adding another
>>>> >> server
>>>> >> to
>>>> >> replicate subvolume? (ie, 2 to 3), or you had one server down when
>>>> >> copying
>>>> >> data (of 2 servers), and you bring back another server up and
>>>> >> trigger
>>>> >> the
>>>> >> afr self heal ?
>>>> >>
>>>> >> Regards,
>>>> >> Amar
>>>> >>
>>>> >> On Tue, Mar 17, 2009 at 7:22 AM, nicolas prochazka
>>>> >> <prochazka.nicolas at gmail.com> wrote:
>>>> >>>
>>>> >>> Yes i'm trying  without any translator but bugs persists.
>>>> >>>
>>>> >>> Into logs i can not see anything interesting, size of file seems
to
>>>> >>> be
>>>> >>> always ok when it begin synchronize.
>>>> >>> As i write before, if i cp files during normal operation ( 2
>>>> >>> servers
>>>> >>> ok ) all is ok, problem appears only when i try to resynchronize (
>>>> >>> rm
>>>> >>> all on one of server ( in storage/posix) directory, gluster
>>>> >>> recreate
>>>> >>> file but empty or with buggy data.
>>>> >>>
>>>> >>> I notice too, that with RC1, during resynchronise, if i try an ls
>>>> >>> on
>>>> >>> mount point, ls is blocking until synchronisation is ending, with
>>>> >>> RC2,
>>>> >>> ls is not blocking.
>>>> >>>
>>>> >>> Regards,
>>>> >>> Nicolas
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>> On Tue, Mar 17, 2009 at 2:50 PM, Gordan Bobic <gordan at bobich.net>
>>>> >>> wrote:
>>>> >>> > Have you tried the later versions (rc2/rc4) without the
>>>> >>> > performance
>>>> >>> > trasnlators? Does the problem persist without them? Anything
>>>> >>> > interesting
>>>> >>> > looking in the logs?
>>>> >>> >
>>>> >>> > On Tue, 17 Mar 2009 14:46:41 +0100, nicolas prochazka
>>>> >>> > <prochazka.nicolas at gmail.com> wrote:
>>>> >>> >> hello again,
>>>> >>> >> So this bug does not occur with RC1
>>>> >>> >>
>>>> >>> >> RC2,RC4 contains bug describe below, not RC1 , any idea ?
>>>> >>> >> Nicolas
>>>> >>> >>
>>>> >>> >> On Tue, Mar 17, 2009 at 12:55 PM, nicolas prochazka
>>>> >>> >> <prochazka.nicolas at gmail.com> wrote:
>>>> >>> >>> I 'm just trying with rc2 , same bug as rc4.
>>>> >>> >>> Regards,
>>>> >>> >>> Nicolas
>>>> >>> >>>
>>>> >>> >>> On Tue, Mar 17, 2009 at 12:06 PM, Gordan Bobic
>>>> >>> >>> <gordan at bobich.net>
>>>> >>> > wrote:
>>>> >>> >>>> Can you check if it works correctly with 2.0rc2 and/or
2.0rc1?
>>>> >>> >>>>
>>>> >>> >>>> On Tue, 17 Mar 2009 12:04:33 +0100, nicolas prochazka
>>>> >>> >>>> <prochazka.nicolas at gmail.com> wrote:
>>>> >>> >>>>> oups,
>>>> >>> >>>>> same problem in fact with simple 8 bytes text file, the file
>>>> >>> >>>>> seems
>>>> >>> >>>>> to
>>>> >>> >>>>> be corrupt.
>>>> >>> >>>>>
>>>> >>> >>>>> Regards,
>>>> >>> >>>>> Nicolas Prochazka
>>>> >>> >>>>>
>>>> >>> >>>>> On Tue, Mar 17, 2009 at 11:20 AM, Gordan Bobic
>>>> >>> >>>>> <gordan at bobich.net>
>>>> >>> >>>>> wrote:
>>>> >>> >>>>>> Are you sure this is rc4 specific? I've seen assorted
>>>> >>> >>>>>> weirdness
>>>> >>> >>>>>> when
>>>> >>> >>>>>> adding
>>>> >>> >>>>>> and removing servers in all versions up to and including
rc2
>>>> >>> >>>>>> (rc4
>>>> >>> >>>>>> seems
>>>> >>> >>>>>> to
>>>> >>> >>>>>> lock up when starting udev on it, so I'm not using it).
>>>> >>> >>>>>>
>>>> >>> >>>>>> On Tue, 17 Mar 2009 11:15:30 +0100, nicolas prochazka
>>>> >>> >>>>>> <prochazka.nicolas at gmail.com> wrote:
>>>> >>> >>>>>>> Hello guys,
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> strange problem :
>>>> >>> >>>>>>> with rc4, afr synchronisation seems to be not work :
>>>> >>> >>>>>>> - If i copy a file on mount gluster, all is ok on all
>>>> >>> >>>>>>> servers
>>>> >>> >>>>>>> - if i add a new server in gluster, this server create my
>>>> >>> >>>>>>> files (
>>>> >>> > 10G
>>>> >>> >>>>>>> size ) , it's appear on XFS as 10G file but file does not
>>>> >>> >>>>>>> contains
>>>> >>> >>>>>>> original, just some octets,
>>>> >>> >>>>>>> then gluster do not synchronise, perhaps because the size
>>>> >>> >>>>>>> is
>>>> >>> >>>>>>> same.
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> regards,
>>>> >>> >>>>>>> NP
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume brickless
>>>> >>> >>>>>>> type storage/posix
>>>> >>> >>>>>>> option directory /mnt/disks/export
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume brickthread
>>>> >>> >>>>>>> type features/posix-locks
>>>> >>> >>>>>>> option mandatory-locks on          # enables
mandatory
>>>> >>> >>>>>>> locking
>>>> >>> >>>>>>> on
>>>> >>> >>>>>>> all
>>>> >>> >>>>>> files
>>>> >>> >>>>>>> subvolumes brickless
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume brick
>>>> >>> >>>>>>> type performance/io-threads
>>>> >>> >>>>>>> option thread-count 4
>>>> >>> >>>>>>> subvolumes brickthread
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume server
>>>> >>> >>>>>>> type protocol/server
>>>> >>> >>>>>>> subvolumes brick
>>>> >>> >>>>>>> option transport-type tcp
>>>> >>> >>>>>>> option auth.addr.brick.allow 10.98.98.*
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> -------------------------------------------
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume brick_10.98.98.1
>>>> >>> >>>>>>> type protocol/client
>>>> >>> >>>>>>> option transport-type tcp/client
>>>> >>> >>>>>>> option transport-timeout 120
>>>> >>> >>>>>>> option remote-host 10.98.98.1
>>>> >>> >>>>>>> option remote-subvolume brick
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume brick_10.98.98.2
>>>> >>> >>>>>>> type protocol/client
>>>> >>> >>>>>>> option transport-type tcp/client
>>>> >>> >>>>>>> option transport-timeout 120
>>>> >>> >>>>>>> option remote-host 10.98.98.2
>>>> >>> >>>>>>> option remote-subvolume brick
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume last
>>>> >>> >>>>>>> type cluster/replicate
>>>> >>> >>>>>>> subvolumes brick_10.98.98.1 brick_10.98.98.2
>>>> >>> >>>>>>> option read-subvolume brick_10.98.98.1
>>>> >>> >>>>>>> option favorite-child brick_10.98.98.1
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>> volume iothreads
>>>> >>> >>>>>>> type performance/io-threads
>>>> >>> >>>>>>> option thread-count 4
>>>> >>> >>>>>>> subvolumes last
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume io-cache
>>>> >>> >>>>>>> type performance/io-cache
>>>> >>> >>>>>>> option cache-size 2048MB             # default is
>>>> >>> >>>>>>> 32MB
>>>> >>> >>>>>>> option page-size  128KB             #128KB is
>>>> >>> >>>>>>> default option
>>>> >>> >>>>>>> option cache-timeout 2  # default is 1
>>>> >>> >>>>>>> subvolumes iothreads
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> volume writebehind
>>>> >>> >>>>>>> type performance/write-behind
>>>> >>> >>>>>>> option aggregate-size 128KB # default is 0bytes
>>>> >>> >>>>>>> option window-size 512KB
>>>> >>> >>>>>>> option flush-behind off      # default is 'off'
>>>> >>> >>>>>>> subvolumes io-cache
>>>> >>> >>>>>>> end-volume
>>>> >>> >>>>>>>
>>>> >>> >>>>>>>
>>>> >>> >>>>>>> _______________________________________________
>>>> >>> >>>>>>> Gluster-devel mailing list
>>>> >>> >>>>>>> Gluster-devel at nongnu.org
>>>> >>> >>>>>>> http://lists.nongnu.org/mailman/listinfo/gluster-devel
>>>> >>> >>>>>>
>>>> >>> >>>>>>
>>>> >>> >>>>>> _______________________________________________
>>>> >>> >>>>>> Gluster-devel mailing list
>>>> >>> >>>>>> Gluster-devel at nongnu.org
>>>> >>> >>>>>> http://lists.nongnu.org/mailman/listinfo/gluster-devel
>>>> >>> >>>>>>
>>>> >>> >>>>
>>>> >>> >>>>
>>>> >>> >>>> _______________________________________________
>>>> >>> >>>> Gluster-devel mailing list
>>>> >>> >>>> Gluster-devel at nongnu.org
>>>> >>> >>>> http://lists.nongnu.org/mailman/listinfo/gluster-devel
>>>> >>> >>>>
>>>> >>> >>>
>>>> >>> >
>>>> >>> >
>>>> >>> > _______________________________________________
>>>> >>> > Gluster-devel mailing list
>>>> >>> > Gluster-devel at nongnu.org
>>>> >>> > http://lists.nongnu.org/mailman/listinfo/gluster-devel
>>>> >>> >
>>>> >>>
>>>> >>>
>>>> >>> _______________________________________________
>>>> >>> Gluster-devel mailing list
>>>> >>> Gluster-devel at nongnu.org
>>>> >>> http://lists.nongnu.org/mailman/listinfo/gluster-devel
>>>> >>
>>>> >>
>>>> >>
>>>> >> --
>>>> >> Amar Tumballi
>>>> >>
>>>> >>
>>>> >
>>>>
>>>
>>>
>>>
>>> --
>>> Amar Tumballi
>>>
>>>
>>

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