Hello Tab, Thank you for your reply, you are absolutely wright ! A few days ago we changed our diskpool from 1 volume of 16 Gb. to 16 volumes of 1 Gb. This gives a whole lot of difference !! I watched the backup (quite interesting) the whole night (didn't go to sleep), and saw that no Media Wait occured. According the advice from somebody else in this newsgroup we lowered the high mig threshold to 50 %. Now the backuppool gets to a maximum of 80 % Util.
Regards, Wouter. -----Oorspronkelijk bericht----- Van: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]Namens Tab Trepagnier Verzonden: vrijdag 25 januari 2002 2:14 Aan: [EMAIL PROTECTED] Onderwerp: Re: Storage Pool Migration and Mediawait question/problem Wouter, You didn't provide info on your disk pool setup, but a few months back on the forum there was a discussion on whether it was better to use one big volume or carve up the disks into multiple smaller volumes. If you encounter media wait status during migrations at the low migration thresholds you have set, either the "next" file won't fit in the remaining space and all downstream tape drives are in use, or you have only one or two disk volumes and the client can't get a lock on another volume to use while the migration is running. I personally subscribe to the theory that more volumes (within reason) are better. Most of my disk pools consist of many 1000 MB volumes. I have migration threshold set to 75% and I NEVER see "waiting for mount" messages in the backup logs. And my disk pools are "too small" by TSM best practice standards. Good luck. Tab Trepagnier TSM Administrator Laitram Corporation Wouter V <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 01/18/2002 05:21:27 PM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Storage Pool Migration and Mediawait question/problem Why does the migration process cause a (large) delay for my backups (mediawait) ? I don't understand why backup can't continue while TSM is migrating the data from disk to tape ? There is still enough place in the diskpool ! Can anybody give me any hints are recommandations ? Thank you in advance !! Wouter V. Storage Device Estimated Pct Pct High Low Next Stora- Pool Name Class Name Capacity Util Migr Mig Mig ge Pool (MB) Pct Pct ----------- ---------- ---------- ----- ----- ---- --- ----------- ARCHIVEPOOL DISK 0.0 0.0 0.0 90 70 BACKUPPOOL DISK 16,720.0 63.3 57.1 60 30 PTAPE_POOL PTAPE_POOL TAPE_CLASS 1,907,340. 4.6 100.0 100 0 0 SPACEMGPOOL DISK 0.0 0.0 0.0 90 70 Process Process Description Status Number -------- -------------------- ---------------------------------------------- --- 31 Migration Disk Storage Pool BACKUPPOOL, Moved Files: 42790, Moved Bytes: 1,297,846,272, Unreadable Files: 0, Unreadable Bytes: 0. Current Physical File (bytes): 2,043,904 Current output volume: 000013. 32 Migration Disk Storage Pool BACKUPPOOL, Moved Files: 6854, Moved Bytes: 1,225,912,320, Unreadable Files: 0, Unreadable Bytes: 0. Current Physical File (bytes): 14,446,592 Current output volume: 000006. Sess Comm. Sess Wait Bytes Bytes Sess Platform Client Name Number Method State Time Sent Recvd Type ------ ------ ------ ------ ------- ------- ----- -------- ------------- 11,683 ShMem IdleW 22.6 M 1.7 K 1.1 K Node AIX BWB_ONT 11,684 ShMem Run 0 S 18.7 K 6.2 G Node AIX BWB_ONT 11,685 ShMem IdleW 11.3 M 858 821 Node AIX BWB_ONT 11,697 Tcp/Ip IdleW 27.1 M 3.5 M 9.0 K Node WinNT NEWTON 11,698 Tcp/Ip MediaW 20.5 M 714 235.8 M Node WinNT NEWTON 11,703 Tcp/Ip IdleW 21.1 M 3.4 M 650 Node WinNT EINSTEIN 11,704 Tcp/Ip MediaW 21.7 M 354 22.3 K Node WinNT EINSTEIN 11,705 Tcp/Ip MediaW 21.6 M 354 3.9 K Node WinNT EINSTEIN 11,706 Tcp/Ip IdleW 20.6 M 34.8 M 840 Node WinNT EINSTEIN 11,709 Tcp/Ip IdleW 18.6 M 465.0 K 1.1 K Node WinNT ACSL1 11,710 Tcp/Ip MediaW 19.0 M 354 22.3 K Node WinNT ACSL1 11,711 Tcp/Ip IdleW 18.5 M 680.0 K 501 Node WinNT ACSL1 11,712 Tcp/Ip MediaW 18.9 M 354 8.9 K Node WinNT ACSL1 11,714 Tcp/Ip IdleW 16.4 M 1.8 M 589 Node WinNT ITF_TRA 11,715 Tcp/Ip MediaW 16.7 M 354 22.2 K Node WinNT ITF_TRA 11,716 Tcp/Ip IdleW 16.6 M 515 819 Node WinNT ITF_TRA 11,717 Tcp/Ip MediaW 16.5 M 354 5.3 K Node WinNT ITF_TRA 11,718 Tcp/Ip IdleW 9.5 M 2.2 M 546 Node WinNT BWB_TRA1 more... (<ENTER> to continue, 'C' to cancel) 11,720 Tcp/Ip MediaW 9.8 M 354 22.2 K Node WinNT BWB_TRA1 11,721 Tcp/Ip MediaW 9.7 M 360 10.7 K Node WinNT BWB_TRA1 11,722 Tcp/Ip IdleW 9.1 M 2.9 M 534 Node WinNT BWB_TRA1 11,723 Tcp/Ip IdleW 7.1 M 3.2 M 541 Node WinNT NOTES_TRA 11,724 Tcp/Ip IdleW 9.4 M 2.6 K 1.1 K Node WinNT NOTES_TRA 11,725 Tcp/Ip MediaW 7.1 M 409 64.0 M Node WinNT NOTES_TRA 11,726 Tcp/Ip MediaW 9.2 M 406 424.5 K Node WinNT NOTES_TRA 11,727 Tcp/Ip IdleW 7.2 M 2.4 M 611 Node WinNT BSC_NT3_TRA 11,728 Tcp/Ip MediaW 7.3 M 354 22.3 K Node WinNT BSC_NT3_TRA 11,729 Tcp/Ip IdleW 6.6 M 1.7 M 537 Node WinNT BSC_NT3_TRA 11,730 Tcp/Ip MediaW 7.1 M 354 5.2 K Node WinNT BSC_NT3_TRA
