[Gluster-users] question about replicate volume

[Joe Julian]

On 02/23/2016 07:58 PM, Gaurav Garg wrote:
> Hi songxin,
>
> please find comment inline.
>
> ----- Original Message -----
> From: "songxin" <songxin_1980 at 126.com>
> To: gluster-users at gluster.org
> Cc: gluster-users at gluster.org
> Sent: Wednesday, February 24, 2016 7:16:02 AM
> Subject: [Gluster-users] question about replicate volume
>
> Hi all,
> I have a question about replicate volume as below.
>
> precondition：
> 1.A node ip: 128.224.162.163
> 2.B node ip:128.224.162.255
> 3.A node brick:/data/brick/gv0
> 4. B node brick:/data/brick/gv0
>
> reproduce step:
> 1. gluster peer probe 128.224.162.255 //run on A node
> 2.gluster volume create gv0 128.224.162.163 : /data/brick/gv0 force //run on A node
> 3.gluster volume start gv0 //run on A node
> 4. mount -t glusterfs 128.224.162.163:/gv0 gluster //run on A node
> 5.create some file(a,b,c) in directory gluster //run on A node
> 6. gluster volume add-brick gv0 replica 2 128.224.162.255:/data/brick/gv0 force //run on A node
> 7. create some file(d,e,f) in directory gluster //run on A node
> 8. mount -t glusterfs 128.224.162.163:/gv0 gluster //run on B node
> 9.ls gluster //run on B node
>
> My question is as below.
>
> After step 6, the volume type is change from distribute to replicate.
> The file (a,b,c) is created when the volume type is distribute.
> The file (d,e,f) is created when the volume type is replicate.
>
>>> After step 6, does the volume will replicate the file (a,b,c) in two brick?Or it just replicate the file(d,e,f) in two brick?
> If I run "gluster volume heal gv0 full", does the volume will replicate the file (a,b,c) in two brick?
>
>
> After step 6 volume have converted to replicate volume. So if you create file from mount point it will replicate these file to all replica set. In your case after step 6 it will replicate only file(d,e,f) because before step 6 volume was distributed. For replicating all the file (before step 6) you need to run #gluster volume heal <volname> full. After executing this command file in both replica set should be same.

Did that change? It used to trigger the heal crawl automatically when 
you changed the replica count.

> Thanks,
>
> ~Gaurav
>
> Thanks,
> Xin
>
>
>
>
>
>
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