[Gluster-users] Repost: read access to replicate copies

[Mohit Anchlia]

My understanding is that it will issue 2 read requests in parallel and
whichever returns the response first will be used.

On Fri, Mar 11, 2011 at 6:20 AM, Rosario Esposito <resposit at na.infn.it> wrote:
>
> This is a repost, I hope gluster developers can answer this question:
>
> If I have a distributed/replicated volume and a gluster native client needs
> to read a file, which server will be chosen ?
>
> Let's say I have a 2-nodes cluster running the following gluster
> configuration:
>
> ---
> Volume Name: myvolume
> Type: Replicate
> Status: Started
> Number of Bricks: 2
> Transport-type: tcp
> Bricks:
> Brick1: host1:/brick
> Brick2: host2:/brick
> ---
>
> host1 and host2 are also gluster native clients, mounting "myvolume" in
> /gluster
>
> e.g.
>
> [root at host1 ~]# mount | egrep "brick|gluster"
> /dev/sda1 on /brick type ext3 (rw)
> glusterfs#host1:/myvolume on /gluster type fuse
> (rw,allow_other,default_permissions,max_read=131072)
>
> [root at host2 ~]# mount | egrep "brick|gluster"
> /dev/sda1 on /brick type ext3 (rw)
> glusterfs#host2:/myvolume on /gluster type fuse
> (rw,allow_other,default_permissions,max_read=131072)
>
>
> If host1 needs to read the file /gluster/myfile will it use the local copy
> from host1:/brick or the other copy from host2:/brick over the network ?
> Is there a way to force the client to read the local copy ?
>
> Cheers, Rosario
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