Veritas-bu

[Veritas-bu] improving backup speed on NT backups

2000-11-14 15:56:29
Subject: [Veritas-bu] improving backup speed on NT backups
From: W. Curtis Preston curtis AT colltech DOT com
Date: Tue, 14 Nov 2000 12:56:29 -0800
That's good to know, but most NT admins don't seem to know that.

Now, all you've got to do is script it, and you'll have a friend! ;)

At 01:02 PM 11/14/00 -0800, Bob Bakh wrote:
>actually as Domain admin you can administer the Registry remotely =)
>
>Bob "huge fan of UNIX, but forced to live in an NT world" Bakh
>
>-----Original Message-----
>From: W. Curtis Preston [mailto:curtis AT colltech DOT com]
>Sent: Tuesday, November 14, 2000 12:14 PM
>To: Bob Bakh; David A. Chapa; Bob Bakh; Keahey, Ricky L; Long, Matt;
>veritas-bu AT mailman.eng.auburn DOT edu
>Subject: RE: [Veritas-bu] improving backup speed on NT backups
>
>
>Yeah...
>
>Why make things easy to administer when you can put it all inside the
>registry?  Instead of just pushing a file from the master, all you have to
>do is:
>1. physically go to the machine
>2. run regedit
>3. make the changes manually
>4. save the new registry
>
>:(
>
>At 09:02 AM 11/14/00 -0800, Bob Bakh wrote:
> >I could have sworn that the people in engineering have said that in 3.2 you
> >could put the files, but in 3.4 it all got moved into the registry, to stay
> >with Microsoft conventions.
> >
> >Bob
> >
> >-----Original Message-----
> >From: David A. Chapa [mailto:david AT datastaff DOT com]
> >Sent: Tuesday, November 14, 2000 8:43 AM
> >To: Bob Bakh; Keahey, Ricky L; Long, Matt;
> >veritas-bu AT mailman.eng.auburn DOT edu
> >Subject: RE: [Veritas-bu] improving backup speed on NT backups
> >
> >
> >no, actually you don't have to put it in the registry, but just as the Unix
> >product, you can put it in veritas\netbackup\db\config.
> >
> >Since I am a fan of consistency (and hate modifying my Operations Manuals),
> >I prefer to stay out of the registry as much as possible.
> >
> >The default, 4 buffers at 64K typically is sufficient.  However, I have
> >found at one of my client's that the server was having a hard time filling
> >up the buffers, and as a result I was seeing network timeout, etc.
> >
> >My solution was to increase the number of buffers to 8 and reduce the size
> >to 32K.
> >
> >This has had very positive results for all machines in the NT domain.
> >
> >David Chapa
> >DataStaff, Inc.
> >
> >
> >-----Original Message-----
> >From: veritas-bu-admin AT Eng.Auburn DOT EDU
> >[mailto:veritas-bu-admin AT Eng.Auburn DOT EDU]On Behalf Of Bob Bakh
> >Sent: Tuesday, November 14, 2000 10:20 AM
> >To: David A. Chapa; Keahey, Ricky L; Long, Matt;
> >veritas-bu AT mailman.eng.auburn DOT edu
> >Subject: RE: [Veritas-bu] improving backup speed on NT backups
> >
> >
> >actually it's
> >
> >\HKEY_Local_Machine\SOFTWARE\VERITAS\NetBackup\CurrentVersion\Config
> >
> >add a new string
> >
> >SIZE_DATA_BUFFERS with the value in bytes maximum 65536 because NT only
> >allows 64k buffers
> >
> >NUMBER_DATA_BUFFERS I usually keep it a power of 8, 1,2,4,8,16,32,64
> >
> >but I'm anal
> >
> >Bob
> >
> >-----Original Message-----
> >From: David A. Chapa [mailto:david AT datastaff DOT com]
> >Sent: Friday, November 10, 2000 8:10 AM
> >To: Keahey, Ricky L; Long, Matt; veritas-bu AT mailman.eng.auburn DOT edu
> >Subject: RE: [Veritas-bu] improving backup speed on NT backups
> >
> >
> >\veritas\netbackup\db\config\SIZE_DATA_BUFFERS
> >and NUMBER_DATA_BUFFERS
> >
> >do not have any trailing spaces in these files, no comments, etc.
> >
> >Here is the technote on the two parameter files
> >
> >http://seer.support.veritas.com/docs/183702.htm
> >
> >
> >David
> >
> >-----Original Message-----
> >From: Keahey, Ricky L [mailto:ricky.l.keahey AT intel DOT com]
> >Sent: Friday, November 10, 2000 10:00 AM
> >To: 'David A. Chapa'; Long, Matt; veritas-bu AT mailman.eng.auburn DOT edu
> >Subject: RE: [Veritas-bu] improving backup speed on NT backups
> >
> >
> >I am having this same issue except it is in a SAN environment and some of
>my
> >media servers.  I have been looking for the place to change these settings,
> >but can't find them.  Can you point me in the right direction.  I have a
> >total NT environment.
> >
> >Thanks,
> >Rick
> >
> >-----Original Message-----
> >From: David A. Chapa [mailto:david AT datastaff DOT com]
> >Sent: Friday, November 10, 2000 7:29 AM
> >To: Long, Matt; veritas-bu AT mailman.eng.auburn DOT edu
> >Subject: RE: [Veritas-bu] improving backup speed on NT backups
> >
> >
> >Matt:
> >
> >Create /usr/openv/netbackup/logs/bptm on your media server that is backing
> >up your NT machines
> >
> >Run some test backups and review this log.
> >
> >You will want to look for a line
> >
> >waited for full buffer
> >
> >-or-
> >
> >waited for empty buffer (this **MAY** mean an increase in data buffers
>could
> >be used)
> >
> >this will let you know how long it waited for a buffer to be filled prior
>to
> >writing to tape.
> >
> >If there are considerable delays you may want to investigate the network
> >between your media server and your NT clients.  Typical problems are
> >AUTO-NEGOTIATE on your NT machines and AUTO-NEGOTIATE on switches in the
> >closet.  If all of that checks out, and you still aren't satisfied with the
> >results, you **MAY** want to look at the NUMBER_DATA_BUFFER and
> >SIZE_DATA_BUFFERS config options for tuning your performance.  Please keep
> >in mind, that  you want to make sure that you don't adversely affect you
> >current clients.  Believe it or not, in the most recent NT environment that
> >I have been architecting, I found that I needed to reduce the SIZE of the
> >databuffer and increase the NUMBER of the data buffers.  This seems to have
> >increased the speed, I need to follow up with my client to review the
>actual
> >results but the preliminary numbers looked good.
> >
> >Just my two cents worth
> >
> >David
> >
> >-----Original Message-----
> >From: veritas-bu-admin AT Eng.Auburn DOT EDU
> >[mailto:veritas-bu-admin AT Eng.Auburn DOT EDU]On Behalf Of Long, Matt
> >Sent: Thursday, November 09, 2000 11:07 AM
> >To: veritas-bu AT mailman.eng.auburn DOT edu
> >Subject: [Veritas-bu] improving backup speed on NT backups
> >
> >
> >Hello,
> >
> >         Does anyone know how to improve network performance for NT client
> >backups?  Currently,  I am seeing about 4 to 5 mps per second on my UNIX
> >servers but I am only seeing lass than a 1 mps for my NT systems.  Any
> >recommendations out there for this scenario?  Thanks
> >
> >1       nt_filesystem   nt_incrimental nodename         master_server
> >87538   100%    200.075 11/08/2000 5:09:24 PM   00:09:37        11/08/2000
> >5:19:01 PM
> >
> >Matt Long
> >Systems Administration
> >Marriott International
> >301-696-2690
> >
> >_______________________________________________
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> >
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> >
> >
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>
>---
>W. Curtis Preston, Principal Consultant at Collective Technologies
>Email: curtis AT colltech DOT com                (Best way to contact me)
>Work : 408 452 5555                       (Leave a message.)
>Pager: 800 946 4646, pin#1436065        (If urgent.)
>
>Tap into the Collective Intellect (TM): http://www.colltech.com
>Backup & Restore resources:        http://www.backupcentral.com

---
W. Curtis Preston, Principal Consultant at Collective Technologies
Email: curtis AT colltech DOT com                (Best way to contact me)
Work : 408 452 5555                       (Leave a message.)
Pager: 800 946 4646, pin#1436065        (If urgent.)

Tap into the Collective Intellect (TM): http://www.colltech.com
Backup & Restore resources:        http://www.backupcentral.com