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define volume extremely slow

pshedlock

Active Newcomer
#1
I have always scripted my define volume command and run a mix of pre-defined volumes and bfs volumes. Beginning about 6 months ago, the define volume is taking HOURS to define a 100GB volume, which used to take about 3 minutes each. I have opened a ticket with IBM and they haven't been able to help.

I am currently running 8.1.8.200 on RHEL7 7.5 kernel 3.10.0-957.21.3.el7.x86_64. All storage pools are using NFS.

I even created a new device class and pointed it to local SSDs and the define volume was just as bad, any thoughts?
 

hogmaster

ADSM.ORG Senior Member
#2
Verify the diskspeed using dd and post the results
change the path to both your SSD and the regular disk system.
post the exact command/script you are using.

use:
if=/dev/zero of=/tsm/stg/files/test1.img bs=1M count=1000 oflag=dsync
if=/dev/zero of=/tsm/stg/ssd/test1.img bs=1M count=1000 oflag=dsync
 

pshedlock

Active Newcomer
#4
yes defining volumes is slow even on local ssd. Its only defining volumes that is slow. I can move data from one volume to another, i create copy pools to FC LTO8 tapes, create offsite replication pools to antother TSM server, all fine and all to/from nfs diskpools.

command from script:
def vol finance_d /tsm/diskpool/finance/v425 format=102400 wait=yes

I switched from FC diskpools to nfs 2 years ago. Performance is fine and always had been, including defining volumes. Again, it is just define volumes. This is the closest thing is was was to find: https://www.ibm.com/support/pages/define-volume-sles-12-sp2-nfs-has-slow-performance
 

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The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

  • Every product needs a TLA, Let's call it ISP (IBM Spectrum Protect).

    Votes: 18 19.6%
  • Keep using TSM for Spectrum Protect.

    Votes: 57 62.0%
  • Let's be formal and just say Spectrum Protect

    Votes: 10 10.9%
  • Other (please comement)

    Votes: 7 7.6%

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