[Gluster-users] Difference in transltors and a question about live heal

[Raghavendra G]

Hi William,

2009/2/23 William Hanwoody <hanwoody at gmail.com>

>
> > On Sun, Feb 22, 2009 at 11:06 PM, Jeffry Molanus
> >
> > <jeffry.molanus at gmail.com>wrote:
> > > On Sun, 2009-02-22 at 21:34 +0530, Basavanagowda Kanur wrote:
> > > > Davide,
> > > >   Replies inline.
> > > >
> > > > On Sun, Feb 22, 2009 at 2:24 PM, Davide D'Amico
> > > > <davide.damico at gmail.com> wrote:
> > > >         Hi,
> > > >         I was looking for a scalable-ha nfs storage solution and
> > > >         glusterfs seems to be
> > > >         the only out there :-)
> > > >
> > > >         I was reading the documentation and I cannot find the
> > > >         difference
> > > >         between "Replicate
> > > >         Translator" and "HA Translator": the latest seems to be a
> > > >         particular case of the
> > > >         first one when I have only two bricks. Is it right?
> > > > Replicate translator provides replication feature, whereas HA (High
> > > > Availability) translator provides high availability, HA does not do
> > > > any replication.
> > >
> > > Care to explain how it does work then? How can a file be HA if the
> > > server that went down is not replicated?
> >
> > HA is useful when you have multiple network interconnect to the server
> and
> > you want glusterfs to continue working seemlessly, then you would use HA.
> > HA fails over to secondary interconnect, if primary fails.
>
> I think the name of "HA" is mismatch. For replication is also "HA" when one
> of
> storage node went down.
>
> HA of gluster is more like  bonding of multiple network interface，and I
> think
> it is no need for glusterfs, because we can do bonding!!


Bonding does not handle the file operations that are in progress at the time
of connection break down. HA has the awareness of handling such situations.
It resends the operations on another link.


>
> >
> > > >         I intend to create a scalable nfs cluster, so I can add
> > > >         storage nodes
> > > >         to increase
> > > >         storage size: have I to use unify on top of AFR translator
> > > >         (i.e. unify
> > > >         on a replicated
> > > >         volume?).
> > > > you can use 'distribute' (formerly DHT) translator over AFR.
> > > >
> > > >
> > > >
> > > >         I've read that glusterfs has problems with self-healing and
> > > >         opened
> > > >         files: is it true?
> > > >
> > > >
> > > >         Thanks in advance,
> > > >
> > > >         --
> > > >         d.
> > > >
> > > >         _______________________________________________
> > > >         Gluster-users mailing list
> > > >         Gluster-users at gluster.org
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> > > >
> > > >
> > > >
> > > > --
> > > > Gowda
> > > > _______________________________________________
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>
>
>
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-- 
Raghavendra G
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