[Gluster-users] replica count documentation

[Mohit Anchlia]

On Thu, Apr 14, 2011 at 1:33 PM, Craig Younkins <cyounkins at gmail.com> wrote:
>> My understanding is that the file you are writing to is replicated
>> accross "n" number of glusterfs servers. You define that "n" when
>> creating volume.
>
> This is what I thought as well. But at what kind of consistency level? How
> many replicas is the file written to before returning to the client
> application? Assuming I have my replica count set to 2 with my 2 brick
> setup, it sure isn't strict. I've waited 15 mins after the write to one
> brick has finished before it was actually synced up on the second.

There is no consistency level. Response will be returned to the user
after the slowest writes is done. Writes occur sync. to all the
servers in replica set.

>>
>> Try volume info command to see the replicas.
>
> I'm not so much trying to "see the replicas" as get the number of replicas.
> My understanding is that replica != brick, so where is the number of
> replicas in the output below?
> # gluster volume info virt-isos
> Volume Name: virt-isos
> Type: Replicate
> Status: Started
> Number of Bricks: 2
> Transport-type: tcp
> Bricks:
> Brick1: 192.168.0.150:/virt-isos
> Brick2: 192.168.0.151:/virt-isos
> virt1:~#

Look inside /etc/glusterd/*.vol files. There you will see subvolumes info.

> Craig Younkins
>
>
> On Wed, Apr 13, 2011 at 7:17 PM, Mohit Anchlia <mohitanchlia at gmail.com>
> wrote:
>>
>> My understanding is that the file you are writing to is replicated
>> accross "n" number of glusterfs servers. You define that "n" when
>> creating volume.
>>
>> Try volume info command to see the replicas.
>>
>> On Wed, Apr 13, 2011 at 4:14 PM, Craig Younkins <cyounkins at gmail.com>
>> wrote:
>> > So these are probably dumb questions but I cannot find them anywhere in
>> > the
>> > documentation.
>> >
>> > What exactly does the replica count paramater to the volume create
>> > command
>> > mean? How many bricks each block is replicated to?
>> >
>> > How does one query for the replica count of a volume?
>> >
>> > Thanks!
>> >
>> > Craig Younkins
>> >
>> > _______________________________________________
>> > Gluster-users mailing list
>> > Gluster-users at gluster.org
>> > http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
>> >
>> >
>
>