Re: Distributed volumes

[Gambit15 <dougti+gluster@xxxxxxxxx>]

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@xxxxxxxxxx> 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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