[Gluster-users] Arbiter vs Dummy Node Details
Pranith Kumar Karampuri
pkarampu at redhat.com
Wed Dec 30 07:18:40 UTC 2015
On 12/30/2015 06:42 AM, Ravishankar N wrote:
> On 12/30/2015 04:20 AM, Kyle Harris wrote:
>> Hello All,
>> Forgive the duplicate but I forgot to give the first post a title so
>> this corrects that. Anyway, I recently discovered the new arbiter
>> functionality of the 3.7 branch so I decided to give it a try. First
>> off, I too am looking forward to the ability to add an arbiter to an
>> already existing volume as discussed in the following thread:
> This is not implemented yet Kyle. We are targetting it for 3.8.
>> However, my first question for now is can someone perhaps go into a
>> bit of detail regarding the difference between using this new arbiter
>> functionality versus adding a dummy node with regards to helping to
>> eliminate split-brain? In other words, a bit of information on which
>> is best and why?
> See this thread
> for more information. Client quorum is a better way to avoid
> split-brain of files.
> Arbiter is a type of replicate volume which uses client quorum ( plus
> some arbitration logic) to avoid split-brains.
>> Second, I noticed at the following URL where is discusses this new
>> functionality it says, and I quote "/By default, client quorum
>> (cluster.quorum-type) is set to auto . . ."/ which I found to be a
>> bit confusing. After setting up my new cluster I noticed that none
>> of the quorum settings including cluster.quorum-type seem to have a
> The client-quorum is indeed enabled and set to auto; it is just that
> the `volume info` output does not display it correctly. It being
> fixed (http://review.gluster.org/#/c/11872/).
client-quorum is set to auto only for 3 way replication. For 2 way
replication there is no quorum.
>> Arbiter Link
>> Thank you.
>> Gluster-users mailing list
>> Gluster-users at gluster.org
> Gluster-users mailing list
> Gluster-users at gluster.org
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