Gluster users - Aug 2015 - Read Only equivalent to cluster.server-quorum-ratio

At home I've a very small gluster cluster (2 nodes) with a few volumes.  
Basically I've set up gluster volumes for "irreplaceable" content
that
is replicated to a few systems - for example, photos. But one system is 
currently out due to a failed PSU.  I'd like to keep the volume 
accessible to the rest of my network, but as Read Only.  The 
cluster.server-quorum-ratio looks to bring the volume off line if the 
quorum isn't met.  Since nearly all the access to these files is Read 
Only anyway I can just defer the writes, is there a tunable that will 
automatically put the volume into Read Only when the quorum isn't met 
and then bring it back to Read Write automatically when enough bricks 
check in?

tldr;  cluster.server-quorum-ratio looks to bring volumes off line when 
the quorum isn't met, I'd rather go Read Only than off line.

Pat


-- 
Pat Riehecky

On 08/22/2015 02:30 AM, Pat Riehecky wrote:
> At home I've a very small gluster cluster (2 nodes) with a few 
> volumes. Basically I've set up gluster volumes for
"irreplaceable"
> content that is replicated to a few systems - for example, photos. But 
> one system is currently out due to a failed PSU.  I'd like to keep the 
> volume accessible to the rest of my network, but as Read Only. The 
> cluster.server-quorum-ratio looks to bring the volume off line if the 
> quorum isn't met.  Since nearly all the access to these files is Read 
> Only anyway I can just defer the writes, is there a tunable that will 
> automatically put the volume into Read Only when the quorum isn't met 
> and then bring it back to Read Write automatically when enough bricks 
> check in?
>
> tldr;  cluster.server-quorum-ratio looks to bring volumes off line 
> when the quorum isn't met, I'd rather go Read Only than off line.
>
cluster.client-quorum does what you describe, but only for replicate 
subvolumes. I suppose manually enabling `features.read-only ` is 
something you can use instead.

-Ravi
> Pat
>
>