[Gluster-users] Sync data

[Raphael Rabelo]

Hello guys, i'm back =)
This suggest works but, no fully.

Actual Scenario:

2 bricks (node1 and node2) - It contains all data (about 2.0Tb).
I added more 2 bricks (node3 and node4) with replica 4.
In a client server (client1) I already want the "/data" mounted, and
executed the command  "find . | xargs stat".
So, the nodes 1 and 2 starting to replicate data to new bircks, but after a
week the replication stop.
Now i have 2.0Tb in node1 and node2, and 1.3Tb in node3 and node4.

How can i sync the ramainder data to this nodes ?


2013/11/26 shwetha <spandura at redhat.com>

>  1.
>
> Option: cluster.read-subvolume
> Default Value: (null)
> Description: inode-read fops happen only on one of the bricks in
> replicate. Afr will prefer the one specified using this option if it is not
> stale. Option value must be one of the xlator names of the children. Ex:
> <volname>-client-0 till <volname>-client-<number-of-bricks - 1>
>
> For any volume option information execute "gluster volume set help"
>
> 2. " find . " will get fetch all the directories entries of the mount.
> When we execute stat on each of file and directory it gets the stat
> structure of the file.
>
> In your case we set the "cluster.read-subvolume" to node-1 is because
> node-1 has all the data and the read has to happen from node-1 so that 1)
> GFID is assigned to the file/directory ( since your files/directories were
> created from backend and doesn't have any GFID's yet ) 2) when stat is
> performed on the file/directory the file/directory is self-healed to
> node-2.
>
> When you use "cluster.read-subvolume"  all reads will be going to node-1 .
> Hence suggested to you reset this option as soon as the self-heal of data
> is complete.
>
> -Shwetha
>
>
> On 11/25/2013 05:40 PM, Raphael Rabelo wrote:
>
> Hi guys!
>
>  shwetha,
>
>  Just to understand your sugestion:
>
>  1. What meaning "cluster.read-subvolume"? I searching something about
> it, but didn't find anything...
> 2. Why i need to exec "xarg stat" to force the gluster "read" the file?
>
>  My volume has about 1.2Tb of used space, i can't stop the read 'cause my
> application write/read in a real time...
>
>  Thanks!
>
>
> 2013/11/22 Raphael Rabelo <rabeloo at gmail.com>
>
>> Thank you!
>>
>>  I'll try this!
>>
>>  Best regards.
>>
>>
>> 2013/11/22 shwetha <spandura at redhat.com>
>>
>>>  Hi Raphael,
>>>
>>> Following are the steps to be followed to sync data from node1 to node2
>>> assuming node1 has the data.
>>>
>>> 1. gluster peer probe node1
>>>
>>> 2. gluster volume create gv0 replica 2 node1:/data node2:/data
>>>
>>> 3. gluster volume start gv0
>>>
>>> 4. gluster volume set gv0 cluster.read-subvolume gv0-client-0
>>>
>>> 5. Create a fuse mount from the client node to the volume : mount -t
>>> glusterfs node1:/gv0 /mnt/gv0
>>>
>>> 6. From client node : cd /mnt/gv0 ;  find . | xargs stat
>>>
>>> This should self-heal all your data from node1 to node2.
>>>
>>> Once the self-heal is complete reset the "cluster.read-subvolume" volume
>>> option.
>>>
>>> 7. gluster volume reset gv0 cluster.read-subvolume
>>>
>>> 8. Unmount the mount point and remount for using it again.
>>>
>>> Regards
>>> -Shwetha
>>>
>>>
>>> On 11/21/2013 08:51 PM, Raphael Rabelo wrote:
>>>
>>>   I guys!
>>>
>>>
>>>  i have 2 servers in replicate mode, the node 1 has all data, and the
>>> cluster 2 is empty.
>>>  I created a volume (gv0) and start it.
>>>
>>>  Now, how can I synchronize all files on the node 1 by the node 2 ?
>>>
>>>  Steps that I followed:
>>>
>>> gluster peer probe node1
>>> gluster volume create gv0 replica 2 node1:/data node2:/data
>>>  gluster volume gvo start
>>>
>>>
>>>  thanks!
>>>
>>>
>>>   _______________________________________________
>>> Gluster-users mailing listGluster-users at gluster.orghttp://supercolony.gluster.org/mailman/listinfo/gluster-users
>>>
>>>
>>>
>>>
>>
>
>
>
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