Veritas-bu

Re: [Veritas-bu] Multiple copies option in Netbackup

2011-04-22 13:42:07
Subject: Re: [Veritas-bu] Multiple copies option in Netbackup
From: "stefanos" <smpt1 AT peppas DOT gr>
To: <Rusty.Major AT sungard DOT com>
Date: Fri, 22 Apr 2011 20:41:56 +0300

Yes, you are right.

One problem SLP has is that if the source copy is not available (tape out of robot) the SLP will never end and the backup will never expire. The same is true for the tape having the image, although it has the correct expiration date.

I suppose that the correct way to implement SLP is that the backup had to expire if the SLP longest expiration time reached, and not stay infinite.

 

stef

 

From: Rusty.Major AT sungard DOT com [mailto:Rusty.Major AT sungard DOT com]
Sent: Friday, April 22, 2011 7:45 PM
To: stefanos
Cc: 'pranav batra'; 'Veritas'; veritas-bu-bounces AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Multiple copies option in Netbackup

 

To expand on this a bit more, SLP's sole function is to guarantee that your destinations/copies that you have defined will happen. The only thing to note is that SLP only takes over once the initial backup has completed, so if the initial backup fails, you will have issues. To do this, SLP will actually set copy1 to infinite expiration until it has satisfied the additional copies. I can't remember exactly how it is, but I believe in the first 3 days, it will try several times per day to complete that copy (based on your configuration), and then after that it will try once per day. You should still watch the number of images you have that are not completing via the nbstlutil command, though.

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 Think before you print
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stefanos <smpt1 AT peppas DOT gr>
Sent by: <veritas-bu-bounces AT mailman.eng.auburn DOT edu>

04/22/2011 02:39 AM

To

'pranav batra' <pranav_venture AT hotmail DOT com>, <rusty.major AT sungard DOT com>, 'Veritas' <veritas-bu AT mailman.eng.auburn DOT edu>

cc

Subject

Re: [Veritas-bu] Multiple copies option in Netbackup

 




SLP will do it for you.
If you decide to use inline copy then:
Go to catalog, select duplicate and find the backup image you want to duplicate. Select it and right click on it.  Select duplicate
 
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of pranav batra
Sent:
Friday, April 22, 2011 9:09 AM
To:
rusty.major AT sungard DOT com; Veritas
Subject:
Re: [Veritas-bu] Multiple copies option in Netbackup

 
Thanks Rusty and Stef ,
 
 
My only concern is there now ,how will I start the copy 2 ,if copy 2 fails after successfully copy1 backup.
Is there any way to manually start the copy 2 backup ?
 
Pranav


 



To: smpt1 AT peppas DOT gr
CC: pranav_venture AT hotmail DOT com; veritas-bu AT mailman.eng.auburn DOT edu; veritas-bu-bounces AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Multiple copies option in Netbackup
From: Rusty.Major AT sungard DOT com
Date: Thu, 21 Apr 2011 11:54:39 -0500

SLP will guarantee that the subsequent copies get completed before expiring the original backup image (copy 1). With normal duplication or inline tape copies, you don't get this level of protection. Once the initial backup is completed, the impact of duplication is on the media server, not the client.


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
Think before you print
CONFIDENTIALITY:  This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited.  If you received this e-mail in error, please notify the sender and delete this e-mail from your system.

smpt <smpt1 AT peppas DOT gr>
Sent by: <veritas-bu-bounces AT mailman.eng.auburn DOT edu>
04/21/2011 09:50 AM

 

To

'pranav batra' <pranav_venture AT hotmail DOT com>, 'Veritas' <veritas-bu AT mailman.eng.auburn DOT edu>

cc

Subject

Re: [Veritas-bu] Multiple copies option in Netbackup


 

 





Hello,

1.        both backup copies will start in parallel.
2.        Automatically, only with SLP. But you can manual duplicate the backup.

3.        SLP is better. Even if you do only dual copy backups and no duplications, if a copy fail, SLP will create it  by duplicating from the succeeded copy.

Both ways, SLP and inline copy, are working the same way. They read the data ones and write the data to two locations at the same time. The speed of the backup is the speed of the slower device + a small overhead.

 
Stef

 
 
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu [
mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of pranav batra
Sent:
Thursday, April 21, 2011 5:23 PM
To:
Veritas
Subject:
[Veritas-bu] Multiple copies option in Netbackup

 
Hello Geeks ,
 
 
Good Day !!
 
I have few questions in mind about the multiple copies option in Netbackuo
 
 
1) Does both copies start parallely ?
2) How can one start the copy 2 if it fails after successful copy 1 ?
3) WHat is better SLP or Multiple copies  ?
 
I guess SLP uses the image already made to duplicate but multiple copies is just like backup so putting double load on client and backup windows will also increase ?
 
 
 
Please clear me on this.
 
 
Thanks ,
Pranav
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