Rusty,
I'm talking about full VM recovery.
Let's imagine we have a VM with vmdk of 500Gb. We've made a full backup (500Gb) plus several CBT incrementals (say 10-20 Gb). Next, we screwed the VM and want to recover.
NBU in this case restores first backup (full VM) plus required number of CBT incrementals. (500Gb plus a few chunks of 10-20Gb).
In case of Avamar, it does analysis of the screwed VM and restores just a few blocks that have been changed since last backup (i.e. just a fraction of CBT incremental), this is what I'd love to see in NBU.
WBR, Mikhail
From: <Rusty.Major AT sungard DOT com>
Date: Wed, 1 Jun 2011 17:00:49 -0500 To: <mikhail.nikitin AT gmail DOT com> Cc: Bahadir Kiziltan<bahadir.kiziltan AT gmail DOT com>; <VERITAS-BU AT mailman.eng.auburn DOT edu>; <veritas-bu-bounces AT mailman.eng.auburn DOT edu> Subject: Re: [Veritas-bu] VM File Level Backups and not Full VMDK withfilelevel rest
Mikhail,
I'm not following what you're saying.
NBU can restore granular files from a CBT enabled backup. How does Avamar
differ from that?
Rusty Major, MCSE, BCFP, VCS ▪
Sr. Storage Engineer ▪ SunGard Availability Services ▪ 757 N. Eldridge
Suite 200, Houston TX 77079 ▪ 281-584-4693
Keeping People and Information Connected®
▪ http://availability.sungard.com/
P
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| Re: [Veritas-bu] VM File Level Backups
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Hello Bahadir,
I have mentioned that NBU does support for CBT during backup. Unfortunately
it does not support it for restores, because you still have to recover
full VMDK image and apply CBT incrementals. Other solutions (Avamar, for
example) don't use the full VMDK for recovery if they need to recover just
a few blocks.
WBR, Mikhail
From: Bahadir Kiziltan <bahadir.kiziltan AT gmail DOT com>
Date: Mon, 30 May 2011 15:58:26 +0300
To: <mikhail.nikitin AT gmail DOT com>
Cc: <VERITAS-BU AT mailman.eng.auburn DOT edu>
Subject: Re: [Veritas-bu] VM File Level Backups
and not Full VMDK with filelevel rest
Mikhail,
NetBackup does support CBT in VMware backups.
Even, you can restore a single file from CBT enabled backups.
Depending on the NBU version, you need to modify the FlashBackup-Windows
policy appropriately.
Bahadir.
On Thu, May 26, 2011 at 10:14 AM, Mikhail Nikitin <mikhail.nikitin AT gmail DOT com>
wrote:
Additionally to CBT backups, Avamar can also leverage
CBT during restores. This feature could be useful if you need to restore
a VM of several hundreds of GBs: it will only recall bytes that have been
modified since last backup from backup. Looking forward to see similar
feature in NBU.
WBR, Mikhail
------Original Message------
From: mitch808
Sender: veritas-bu-bounces AT mailman.eng.auburn DOT edu
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
ReplyTo: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] VM File Level Backups and not Full VMDK with filelevel
rest
Sent: May 26, 2011 10:45
What do you mean "File level backups?"
There is either image level (entire VMDK) or guest level (agent within
guest) Which NBU can do both, among many other backup vendors.
VCB is so last year. the new vStorage API's can use Change Block
tracking (CBT) so you dont have to send the entire VMDK each time. This
was a VCB limitation.
I know Avamar is one great solution that takes CBT even further by deduping
even the CBT blocks.
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