[Veritas-bu] Increasing NetBackup Tape Block Size
2001-03-22 16:04:04
Thanks!
Will this require a restart of netbackup?
-----Original Message-----
From: Mike Andres [mailto:mike_andres AT cnt DOT com]
Sent: Thursday, March 22, 2001 4:01 PM
To: 'Gajda, Michael [IT]'
Cc: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: RE: [Veritas-bu] Increasing NetBackup Tape Block Size
echo 262144 > /usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS will increase
tape buffer size to 256K
-mike
-----Original Message-----
From: Gajda, Michael [IT] [mailto:michael.gajda AT ssmb DOT com]
Sent: Wednesday, March 21, 2001 2:42 PM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] Increasing NetBackup Tape Block Size
Is there a way to increase the size of the tape blocks that NetBackup
(3.4.1) writes? I am trying to improve the performance of an STK 9840 tape
drive connected via fibre to a SAN. Using NetBackup (and my test data) I
was only able to achieve backups at the rate of 6.5MB/sec.
I got similar results using GNU tar and the default block size of 64KB, but
when I increased the block size to 256KB I backed up the same data at the
rate of 12MB/sec.
NetBackup uses a block size of 64KB.
****************************************************************
Michael Gajda michael.gajda AT ssmb DOT com
Salomon Smith Barney Dasd Management/Vital Records
745 Route 3 phone: 201-231-3408
Rutherford, NJ 07070
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