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

Mohit Anchlia mohitanchlia at gmail.com
Fri Mar 11 10:24:43 PST 2011


This is what I found contray to what I said. I thought I read it
otherwise somewhere else. Documentation still lacks good information.

http://gluster.org/pipermail/gluster-users/20081021/000496.html


On Fri, Mar 11, 2011 at 9:58 AM, Mohit Anchlia <mohitanchlia at gmail.com> wrote:
> 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
>> _______________________________________________
>> Gluster-users mailing list
>> Gluster-users at gluster.org
>> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
>>
>


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