Veritas-bu

[Veritas-bu] snapmirrored volumes question

2005-04-04 15:41:41
Subject: [Veritas-bu] snapmirrored volumes question
From: Algo Seeker <algorithm AT gmail DOT com> (Algo Seeker)
Date: Mon, 4 Apr 2005 15:41:41 -0400
I am not a NetAPP guy, How do I know that a snapshot created at Source
volume has been totoally in sync at the destination, whicl I can the
that source and destination are mirroring data all the time?


Thanks

On Apr 4, 2005 3:13 PM, Kennedy, Jeffrey <jkennedy AT qualcomm DOT com> wrote:
> Best bet then, at least as far as I can tell, is to manually create a
> snapshot on the source, wait for it to replicate to the destination,
> then backup that snapshot at the destination and manually delete it when
> the backup is done.
> 
> This could be scripted as well if your backup server is an admin host of
> the source filer.
> 
> ~JK
> 
> -----Original Message-----
> From: Algo Seeker [mailto:algorithm AT gmail DOT com]
> Sent: Monday, April 04, 2005 7:17 AM
> To: Kennedy, Jeffrey
> Cc: Tim Berger; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] snapmirrored volumes question
> 
> The volume is volume level snapmirrored and is continuously syncing
> data. I doubt my backups will finish in 24 hours. Anybody else have
> any thoughts, how to backup a snapmirrored volume?
> 
> Thanks
> 
> On Apr 4, 2005 2:00 AM, Kennedy, Jeffrey <jkennedy AT qualcomm DOT com> wrote:
> > If the volume is truly a volume-level snapmirror destination then I
> > don't think you can do it normally.
> >
> > You can use a specific snapshot like nightly.0 as long as you are sure
> > the backup will finish within 24 hours.  Regardless of how frequently
> > you snapmirror the volume nightly.0 will not change until midnight.
> >
> > ~JK
> >
> > -----Original Message-----
> > From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> > [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Algo
> > Seeker
> > Sent: Sunday, April 03, 2005 1:37 PM
> > To: Kennedy, Jeffrey
> > Cc: Tim Berger; veritas-bu AT mailman.eng.auburn DOT edu
> > Subject: Re: [Veritas-bu] snapmirrored volumes question
> >
> > Well myquestion is stl there, should I add the snapmirrored volume in
> > backup selection list. I am talking about the destination volume and
> > the source of snapmirrored volume.
> >
> > Thanks
> >
> > On Apr 3, 2005 2:42 PM, Kennedy, Jeffrey <jkennedy AT qualcomm DOT com>
> wrote:
> > > But now you're talking snapvault, which is very different from
> volume
> > > level snapmirror.  And I thought that was what the OP's question was
> > > about.
> > >
> > > Snapvault only functions on the qtree level, not volume.  You can
> > > snapvault an entire volume but you're just grabbing every qtree and
> > > snapvaulting them en masse. That leaves the destination volume as
> > > read-write still, snapshots not a problem then.
> > >
> > > But if you snapmirror at the volume level, the volume itself is
> > > read-only and therefore not snapshot'able (I'm pretty sure anyway,
> > > haven't done volume level for a while).
> > >
> > > ~JK
> > >
> > > -----Original Message-----
> > > From: Tim Berger [mailto:tim.berger AT gmail DOT com]
> > > Sent: Sunday, April 03, 2005 12:47 AM
> > > To: Kennedy, Jeffrey
> > > Cc: Algo Seeker; veritas-bu AT mailman.eng.auburn DOT edu
> > > Subject: Re: [Veritas-bu] snapmirrored volumes question
> > >
> > > On Apr 2, 2005 11:49 PM, Kennedy, Jeffrey <jkennedy AT qualcomm DOT com>
> > wrote:
> > > > The thing about a snapmirror *volume* is that the entire thing is
> > > > read-only.  Unlike a volume of qtree snapmirror's where the volume
> > is
> > > > read-write but the qtrees are read-only.  This means no snapshots
> > can
> > > be
> > > > taken of a snapmirror'd volume.  At least I'm pretty sure that's
> the
> > > way
> > > > it goes.  If not someone will speak up.
> > >
> > > Sure can.  That's the beauty of the R200.  Snapshots "roll over",
> for
> > > example, from a 960, as snapshots of the snapvaulted copy.  It would
> > > be a a real problem if you couldn't snapshot a snapmirror or
> snapvault
> > > - the process of snapvaulting would corrupt an ongoing backup.
> > >
> > > [snip]
> > >
> > > Cheers,
> > >
> > > -Tim
> > >
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> >
>