Author: Francis Swasey <Frank.Swasey AT UVM DOT EDU>
Date: Tue, 2 Sep 2008 07:27:05 -0400
Perhaps NW has gotten smarter about dealing with VTLs in 7.4 and I don't have a VTL so take what I say with a large grain of salt! If I was to go with a VTL, I would not allow the VTL to write the ph
Author: Terry Lemons <lemons_terry AT EMC DOT COM>
Date: Tue, 2 Sep 2008 09:57:07 -0400
"If I was to go with a VTL, I would not allow the VTL to write the physical tapes. I would have NW control the physical tapes as well as the virtual tapes. I do not want to get into the situation whe
Author: Bruce Breidall <Bruce.Breidall AT CONCUR DOT COM>
Date: Tue, 2 Sep 2008 08:34:59 -0700
I also heard a rumor that EMC will consider forgoing the NW library license costs if you buy a VTL from EMC. Is that true? "If I was to go with a VTL, I would not allow the VTL to write the physical
Author: Curtis Preston <cpreston AT GLASSHOUSE DOT COM>
Date: Tue, 2 Sep 2008 14:42:02 -0400
(VT00001) now This is a red herring, IMHO. In any integrated VTL worth its salt, this is done with barcode matching: 1. You put physical tape LT00001 into the physical library (PTL) 2. VTL inventori
Author: Curtis Preston <cpreston AT GLASSHOUSE DOT COM>
Date: Tue, 2 Sep 2008 14:57:40 -0400
an Sorry, Terry, but this doesn't solve my core issue, and, IMHO, creates another one. My core issue is the difficulty of creating clones in the first place. Moving the SN inside the VTL doesn't cha
The implementations I've done, cloning outside the VTL was the right way to do it. Cloning in NW is not that hard, it does take some effort, but when you're cloning from VTL to physical tape autoclon
Author: Francis Swasey <Frank.Swasey AT UVM DOT EDU>
Date: Tue, 2 Sep 2008 15:42:23 -0400
Curtis, You were the one arguing for using small virtual tapes to make everything work really slick with the VTL. Now, you are saying doing that is a red herring. What do you really believe? On 9/2/0
Author: Curtis Preston <cpreston AT GLASSHOUSE DOT COM>
Date: Tue, 2 Sep 2008 17:01:50 -0400
You must have misread my post (or I mistyped) it if you thought I was advocating for bigger virtual tapes. The red herring I was referring to was that you would get barcode mismatches by using integr
Author: Curtis Preston <cpreston AT GLASSHOUSE DOT COM>
Date: Tue, 2 Sep 2008 17:14:17 -0400
way to And most of the ones I've done have been that way as well. IF you can use autocloning or you're a GOOD shell scripter. There's a whole world out that neither apply to. Autocloning doesn't work
Author: anandhg <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Mon, 18 Aug 2008 04:55:53 -0400
I have few adv_file device and I have created a staging policy and add all the adv_file to the same pool because, all the adv_file devices has the same destination pool. But when I am giving "stage a
Author: Peter Viertel <Peter.Viertel AT MACQUARIE DOT COM>
Date: Mon, 18 Aug 2008 19:33:21 +1000
That's right... One nsrstage process uses one drive exclusively. If you cant stream off one adv_file device fast enough to keep a tape drive at max speed then there's something amiss with your adv_fi
Author: anandhg <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Mon, 18 Aug 2008 11:04:19 -0400
Thanks for your response. My requirement is I want to stage the save sets from the faster. Let me give the current backup statistics. A dbase backup using NMO over LAN gave a throughput of 40MB/s and
How many save sets are in your backup? If only one, then you are out of luck since AFAIK you can't send a single saveset to multiple devices simultaneously. How many LTO2 drives do you have access to
Author: anandhg <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Mon, 18 Aug 2008 13:45:45 -0400
The backup I am taking is from a database using NMO, I will have approx 20 save sets. Below is the answers for ur questions How many LTO2 drives do you have access to from the Networker server? The a
Really at this point I think the solution lies in either upgrading your drives to LTO3/4 which may or may not be possible. Or analyzing the specifics of which adv_file each save set is sent to and th
Author: Peter Viertel <Peter.Viertel AT MACQUARIE DOT COM>
Date: Tue, 19 Aug 2008 08:41:20 +1000
Ok if you have rman sending 4 streams then try setting target parallelism on the adv_file devices to 1. This will usually spread the 4 streams across the four adv-file devices. The backup I am taking
Author: anandhg <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Mon, 18 Aug 2008 23:05:32 -0400
Ya peter, currently I am doing the same way that you have said. In this case it takes more physical drives while staging. I also have an LTO3 tape library, I will try the performance using an LTO3 dr
Author: anandhg <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Mon, 18 Aug 2008 23:10:56 -0400
How about Cloning, does it perform the same way as staging, except leaving a copy in the source disk. While cloning does it copy saveset after saveset? +-- +-- To sign off this list, send email to li
Author: Peter Viertel <Peter.Viertel AT MACQUARIE DOT COM>
Date: Tue, 19 Aug 2008 14:56:58 +1000
Nsrclone from an adv_file performs the same way as nsrstage, just doesn't do the deleting at the end. NOTICE This e-mail and any attachments are confidential and may contain copyright material of Mac
Author: Curtis Preston <cpreston AT GLASSHOUSE DOT COM>
Date: Tue, 19 Aug 2008 17:10:58 -0400
I understand that each staging process will only use one drive at a time, but is there a way that he can get more than one staging process reading from the same AFTD? What if he doesn't do it automat