[Gluster-users] Always writeable distributed volume

[Nithya Balachandran]

On 1 February 2017 at 19:30, Jesper Led Lauridsen TS Infra server <JLY at dr.dk
> wrote:

> Arbiter, isn't that only used where you want replica, but same storage
> space.
>
> I would like a distributed volume where I can write, even if one of the
> bricks fail. No replication.
>
>
DHT does not currently allow that as that could lead to differnt files with
duplicate names on different bricks.

Regards,
Nithya

Thanks
> Jesper
>
> > -----Oprindelig meddelelse-----
> > Fra: Cedric Lemarchand [mailto:yipikai7 at gmail.com]
> > Sendt: 1. februar 2017 13:41
> > Til: Jesper Led Lauridsen TS Infra server <JLY at dr.dk>
> > Cc: gluster-users at gluster.org
> > Emne: Re: [Gluster-users] Always writeable distributed volume
> >
> > Short answer : I think you need to add an arbiter node, this way the
> cluster
> > keeps being writable when there is at least 2 nodes presents (eg 1 data
> node
> > is down). This solve the split brain case where only 2 nodes are
> involved in
> > the setup.
> >
> > Cheers
> >
> > --
> > Cédric Lemarchand
> >
> > > Le 1 févr. 2017 à 13:18, Jesper Led Lauridsen TS Infra server <
> JLY at dr.dk> a
> > écrit :
> > >
> > > Hi,
> > >
> > > I am wondering if it is possible to create an always writeable
> distributed
> > volume.
> > >
> > > Reading the documentation I can figure out how. So is it possible?
> > > If I understand the docs correctly. The DHT determines based on a hash
> of
> > the filename, which brick to place the file. And if you have two bricks
> and
> > loose one brick I can't create files DHT determines should be places on
> the
> > failed brick.
> > >
> > > I have tried creating a distributed volume on two bricks/nodes. And as
> the
> > feared I can't write files DHT determines should be placed on a failed
> node. I
> > am well aware and can accept that I can't access or re-create files
> already
> > created on the failed node. But I would like to write new files.
> > >
> > > Is there a setting/feature I can enable that allows me to create file
> on the
> > available/online bricks even if DHT determines that the file should be
> placed
> > on the unavailable/failed?
> > >
> > > My use case is: I want to use a Gluster volume for temporary storage
> that is
> > always available, as in I can always mount and write to it . We have a
> lot of
> > media file that is transcoded on user request and there need at temporary
> > storage for this operation. All I need is a temporary, fast and always
> > accessible storage with no data security/replica.
> > >
> > > Regards
> > > Jesper
> > >
> > > _______________________________________________
> > > Gluster-users mailing list
> > > Gluster-users at gluster.org
> > > http://lists.gluster.org/mailman/listinfo/gluster-users
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