[Gluster-users] Distributed volumes

[Gambit15]

Distributed is the default, and replicated distributes as long as there are
at least twice the number of bricks as your replication level.

For example...

gluster volume create gv0 server1:/data/brick1/gv0 server2:/data/brick1/gv0
server3:/data/brick1/gv0
...distributes files across all three servers/bricks.

gluster volume create gv0 replica 3 server1:/data/brick1/gv0
server2:/data/brick1/gv0 server3:/data/brick1/gv0
...creates a volume across the servers/bricks with 3 replicas. As there are
only 3 servers/bricks, there is nothing to distribute to.

gluster volume create gv0 replica 2 server1:/data/brick1/gv0
server2:/data/brick1/gv0 server3:/data/brick1/gv0 server4:/data/brick1/gv0
...distributes files across server1 & server2, & replicates server1 to
server3 & server2 to server4. (This is purely an example though, as this
particular config would then be vulnerable to split-brain).

D

On 8 February 2017 at 06:12, Dave Fan <dave.fan at shudun.com> wrote:

> Hi,
>
> I'm new to Gluster so a very basic question. Are all volumes distributed
> by default? Is there a switch to turn this feature on/off?
>
> I ask this because in an intro to Gluster I saw "Replicated Volume" and
> "Distributed Replicated Volume". Is the first type, "Replicated Volume",
> not distributed?
>
> Many thanks,
> Dave
>
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> Gluster-users at gluster.org
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