[Gluster-devel] Question on Geo-Replication

[Pitichai Pitimaneeyakul]

Thank you Vijaykumar,
I will double check on xtime xattr.
Thanks,
Pitichai
On 07/24/2012 01:49 AM, Vijaykumar Koppad wrote:
> Hi Pitichai,
>
>     First of all , having AFR over WAN is not a favorable setup.
> Things might go wrong with that setup. And Geo-rep over LAN is also
> not like using it efficiently. I can't say right now , why those files
> didn't get synced , unless i look into the logs. And there is nothing much
> about pre-existing data with Geo-rep.
>       And about erasing indexing , you should do gluster volume set <vol-name> indexing off,
> after stopping the geo-rep session. When you start geo-rep again , it will assign
> xtime to all the files which doesn't have xtime and starts syncing.
>   
> Thanks,
> Vijaykumar
>
> ----- Original Message -----
> From: "Pitichai Pitimaneeyakul" <pitichai at 2-cans.com>
> To: "Vijaykumar Koppad" <vkoppad at redhat.com>
> Cc: "gluster-devel" <gluster-devel at nongnu.org>
> Sent: Monday, July 23, 2012 6:09:36 PM
> Subject: Re: [Gluster-devel] Question on Geo-Replication
>
> Hi Vijaykumar,
> Thank you for quick response. :)
>
> This is what happen in Our Lab. We are setting as below with Gluster 3.3.0 on Debian
>
> Server-C (company location) <=== AFR over WAN ===> { Server-A(ISP) ==Geo Replication over LAN ==> Server-B(ISP) }
>
> I have configure geo replication for Volume (Vol01) which is created by Server-C brick and Server-A brick as AFR to A volume (Vol02) from Server-B's brick.
> The Vol01 have some data in side.
>
> After I ran "gluster volume geo-replication Vol01 serverB:Vol02 start", It starts replicating but some data under sub directories did not get replicated.
> I have the data set look like this
> data (Vol01)
> |-- atest01.txt
> |-- atest01.mp3
> |-- home
> | `-- users
> | |-- index.html
> | `-- somchai
> | |-- files
> | | `-- test.mp3
> |-- test01.txt
> |-- test01.mp3
>
> On the replication is look like
>
> Vol02
> |-- atest01.txt
> |-- atest01.mp3
> |-- home
> | `-- users
> |-- test01.txt
> |-- test01.mp3
>
> Not all the data and directory structure under /data are replicated, everything look OK except the data under /data/home/users/ is not appear. Even I try to copy some new file into /home/user/somchai directory.
> However, I backed up data and recreated Vol01, Vol02 volume with same configure of replication. I copied data from backup to Vol01, and the replication is correct and complete on Vol02 with full directory tree. If there any thing about preexisting data with geo-replication ?
>
> As Gluster troubleshooting guide said how to enforce full geo-replication by erasing index (page 115, section 14.2.3), and restart geo-replication but I don't see anything mention about erasing indexing in "Tuning Volume Options" as the document said. I would like to confirm the operation of erasing index is "set geo-replication.index=off" or remove ".glusterfs" under Vol01 and Vol02.
>
> For the log file, I will see I can retrieve it or someone already delete them.
>
> Thank you and Best Regards,
> Pitichai
>
>
>
>
>
> On 07/23/2012 03:05 PM, Vijaykumar Koppad wrote:
>
>
> Hi Pitichai,
>
>      It will be helpful to find out the problem, if you provide us
> with the log files and the configuration of the setup.
> And also the data set you are using , I mean the size and number of  files.
>
> Thanks,
> Vijaykumar
>
> ----- Original Message -----
> From: "Pitichai Pitimaneeyakul" <pitichai at 2-cans.com> To: "gluster-devel" <gluster-devel at nongnu.org> Sent: Saturday, July 21, 2012 1:53:24 PM
> Subject: [Gluster-devel] Question on Geo-Replication
>
>
>
>
> Hi there,
>
>
> I ran into problem of synchronization in geo-replication is not completed.
> And I found the the document say about force to full sync by erasing index and restart geo-replication
> as below from Gluster Document. Somehow I went to Tuning Volume Options, there is nothing mention about erasing index.
> Or it is just to set geo-replication.index=off and restart geo-replication ?
>
>
> ======
>
>
> Synchronization is not complete
>
> Description: GlusterFS Geo-replication did not synchronize the data completely but still the geo-replication status display OK.
>
> Solution: You can enforce a full sync of the data by erasing the index and restarting GlusterFS Geo-replication. After restarting, GlusterFS Geo-replication begins synchronizing all the data, that is, all files will be compared with by means of being checksummed, which can be a lengthy /resource high utilization operation, mainly on large data sets (however, actual data loss will not occur). If the error situation persists, contact Gluster Support.
>
> For more information about erasing index, see Tuning Volume Options .
>
> ======
>
> Thank you and Best Regards,
> Pitichai
>
> _______________________________________________
> Gluster-devel mailing list Gluster-devel at nongnu.org https://lists.nongnu.org/mailman/listinfo/gluster-devel
>

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