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[Veritas-bu] improving backup speed on NT backups

2000-11-14 15:13:42
Subject: [Veritas-bu] improving backup speed on NT backups
From: W. Curtis Preston curtis AT colltech DOT com
Date: Tue, 14 Nov 2000 12:13:42 -0800 
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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---
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.)

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