You cannot do this with VxVM alone. If you are using NBU, VxFS, and VxVM,
then you can use NBU's Block Level Incremental Backups to do what you want.
This basically automates the process of creating a baseline no-data snapshot
of a filesystem (at the filesystem level), then uses VxVM and VxFS to
compare the baseline to the current state at each backup and then backs up
only the changed blocks. You can set up Fulls, Cums, Incrementals, etc.
Mark
>>>
>>>Message: 4
>>>Date: Tue, 6 Sep 2005 16:30:13 -0500
>>>From: Ed Wilts <ewilts AT ewilts DOT org>
>>>To: List Veritas List <veritas-bu AT mailman.eng.auburn DOT edu>
>>>Organization: (ewilts)
>>>Subject: [Veritas-bu] Solaris split-mirror backups
>>>
>>>Quicky question since I'm not a Solaris expert...
>>>
>>>Can I split a mirror on Solaris, back up the mirror member,
>>>and then do
>>>an incremental copy of the changed blocks when re-establishing the
>>>mirror? My Solaris admin is saying that I need to do a full
>>>mirror copy
>>>and that's going to be painful...
>>>
>>>Thanks,
>>> .../Ed
>>>
>>>--
>>>Ed Wilts, Mounds View, MN, USA
>>>mailto:ewilts AT ewilts DOT org
>>>
>>>--__--__--
>>>
>>>Message: 5
>>>Subject: RE: [Veritas-bu] Solaris split-mirror backups
>>>Date: Tue, 6 Sep 2005 15:52:46 -0600
>>>From: "Jorgensen, Bill" <Bill_Jorgensen AT csgsystems DOT com>
>>>To: "Ed Wilts" <ewilts AT ewilts DOT org>,
>>> "List Veritas List" <veritas-bu AT mailman.eng.auburn DOT edu>
>>>
>>>Ed:
>>>
>>>When you say you want to split a Solaris mirror is this using Sun's
>>>DiskSuite, LVM or whatever they call it now?
>>>
>>>We use Veritas Volume Manager on our Solaris systems. If you detach a
>>>plex and back that up you will get data that is current to
>>>the time of
>>>the detachment. (You would have to backup the block device due to the
>>>state of the plex with the kernel.) When you reattach the
>>>plex VxVM will
>>>re-silver the just-attached plex and make the data current. You could
>>>try an incremental, but I am in league with your Solaris admin. I
>>>believe you will need to take a full and then incrementals
>>>after. I am
>>>ASS-U-ME'ing a lot too.
>>>
>>>Bill
>>>
>>>----------------------------------
>>> Bill Jorgensen
>>> CSG Systems, Inc.
>>> (w) 303.200.3282
>>> (p) 303.947.9733
>>>----------------------------------
>>>
>>>-----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 Ed Wilts
>>>Sent: Tuesday, September 06, 2005 3:30 PM
>>>To: List Veritas List
>>>Subject: [Veritas-bu] Solaris split-mirror backups
>>>
>>>Quicky question since I'm not a Solaris expert...
>>>
>>>Can I split a mirror on Solaris, back up the mirror member,
>>>and then do
>>>an incremental copy of the changed blocks when re-establishing the
>>>mirror? My Solaris admin is saying that I need to do a full
>>>mirror copy
>>>and that's going to be painful...
>>>
>>>Thanks,
>>> .../Ed
>>>
>>>--
>>>Ed Wilts, Mounds View, MN, USA
>>>mailto:ewilts AT ewilts DOT org
>>>_______________________________________________
>>>Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
>>>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>>>
>>>
>>>--__--__--
>>>
>>>Message: 6
>>>From: Darren Dunham <ddunham AT taos DOT com>
>>>Subject: Re: [Veritas-bu] Solaris split-mirror backups
>>>To: Veritas-bu AT mailman.eng.auburn DOT edu
>>>Date: Tue, 6 Sep 2005 15:05:50 -0700 (PDT)
>>>
>>>> Can I split a mirror on Solaris
>>>
>>>There are different ways of creating a mirror on Solaris, and the
>>>answer depends on how you do it.
>>>
>>>, back up the mirror member, and then do
>>>> an incremental copy of the changed blocks when re-establishing the
>>>> mirror? My Solaris admin is saying that I need to do a
>>>full mirror copy
>>>> and that's going to be painful.
>>>
>>>SDS/LVM and non-flashsnap VxVM do not support incremental
>>>re-establishes. Flashsnap licensed VxVM does.
>>>
>>>Of course, both UFS and VxFS support temporary, consistent
>>>"snapshots"
>>>at the filesystem rather than disk level. You might prefer
>>>to backup a
>>>filesystem snapshot rather than mess with the disk mirroring stuff.
>>>
>>>--
>>>Darren Dunham
>>>ddunham AT taos DOT com
>>>Senior Technical Consultant TAOS
>>>http://www.taos.com/
>>>Got some Dr Pepper? San Francisco,
>>>CA bay area
>>> < This line left intentionally blank to confuse you. >
>>>
>>>--__--__--
|
