I _Almost_ agree with Kelly. A restore will preempt any process running on the same server, but with 6 TSM instances, chances are that your restore is running on a TSM instance that has nothing to preempt, while other instances are busy with eg. reclamation or other less essential tasks.
On 22 sep 2009, at 19:58, Shawn Drew wrote:
HA, perfect! I never knew about the AUTOLABEL option. And wouldn't you know it, we have it enabled already. I also just found out about "SET DRMCHECKLABEL". I think that will take care of everything. I don't have any useful counter ideas but I did have a thought: why limit it? You can set the library to autolabel tapes so you don't need to do that as a separate function and a restore can pre-empt anything running (except a DB backup). You will wait a couple of minutes while the tape dismounts and mounts. I guess when one has 18 tape drives having two on the sideline waiting to do something isn't a bad idea. 18 tape drives! And they're probably the big fast expensive ones too, aren't they? Kelly Lipp Chief Technical Officer www.storserver.com 719-266-8777 x7105 STORServer solves your data backup challenges. Once and for all. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Shawn Drew Sent: Tuesday, September 22, 2009 10:03 AM To: [email protected] Subject: [ADSM-L] Limiting number of drives used I would like to keep 2 drives unused at all times for restores and labeling scratch tapes. TSM 5.5/AIX/Atape We have 18 Drives, 1 library manager and 5 library clients. The "classic" method is to set the "Mount limit" in the device class. However, we also have NDMP clients which are configured so there is more than one device class pointing to the same library. - I can't limit the NAS and LTO device classes each to 16 Drives because some of the time, jobs to both device classes will be running at the same time so the individual classes won't reach 16. - I can't limit each to 8, because the NDMP jobs definitely need more than 8 drives when they are running at night, and the other device class needs more than 8 during the day. Can anyone suggest an alternate way to accomplish this?
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