>From my bptm logs (using the term "copy 2" for destaging processes). I only
do performance type queries on streams larger than 1GB.
size speed
2,064,416 Kbytes at 156,859 Kbytes/sec
2,846,944 Kbytes at 141,879 Kbytes/sec
2,864,206 Kbytes at 130,381 Kbytes/sec
1,406,432 Kbytes at 125,496 Kbytes/sec
1,406,432 Kbytes at 116,736 Kbytes/sec
8,000,000 Kbytes at 110,228 Kbytes/sec
8,000,000 Kbytes at 99,475 Kbytes/sec
3,072,032 Kbytes at 89,119 Kbytes/sec
1,043,516 Kbytes at 81,340 Kbytes/sec
System Model: IBM,9110-51A
Machine Serial Number: 0685B1F
Processor Type: PowerPC_POWER5
Number Of Processors: 4 (8 logical)
Processor Clock Speed: 1648 MHz
CPU Type: 64-bit
Kernel Type: 64-bit
LPAR Info: 1 06-85B1F
Memory Size: 7936 MB
AIX 5.3
NetBackup 5.0MP7
fiber attached LTO-3 IBM drives in an IBM library. All Fiber ports/sfp's
are 4GB.
Bobby Williams
2205 Peterson Drive
Chattanooga, Tennessee 37421
423-296-8200
_____
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ed Wilts
Sent: Thursday, November 29, 2007 4:18 PM
To: [email protected]
Subject: [Veritas-bu] DSSU destaging performance?
An LTO-3 drive needs to run at least 23MB/sec native and preferably over
80MB native (before compression). We're having difficulties consistently
getting over 30 - and frequently get a lot lower - from our Solaris master
server to our tape drives with NetBackup 6.0MP5. Our media servers aren't
great either but they're going over ISLs although the ISLs aren't saturated
(I'm trying to take them out of the picture for to eliminate the ISLs as a
potential culprit). Are other people getting consistently better de-stage
performance? I'm trying to determine if what we've got is unique to us or a
more global issue. Symantec has been trying to help for over a year but we
haven't been able to get our performance up to an acceptable level yet.
If you're getting great performance, please drop me an email and let me know
what your config is.
Thanks,
./Ed
--
Ed Wilts, RHCE, BCFP, BCSD
Mounds View, MN, USA
mailto:[EMAIL PROTECTED]
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