I have TSM server 5.4.3.0 with IBM 3584 Tape library with LTO drives. I have never used Generate Backupset and decided to do some testing to see how long it takes to create, for instance.
I am using LTO tape for the backupset, and using one entire node, not individual filespaces and use toc=no. In 2 days with several nodes, I have gotten basically nowhere. In 6 hours it has "generated" just a couple of GB of data of total requirement of about 50GB. >From watching stats with "q process", it seems that one or both of the following are happening: A. It is scanning the entire TSM DB for what is needed, instead of just that nodes data. and/or B. When it mounts an input tape, it is reading the entire tape instead of just "seeking" to where the required data is. I have no performance issues otherwise with tapes, TSM DB or backups/restores. Could someone shed some light on this slowness issue and how to speed it up? Thanks, David Longo ##################################### This message is for the named person's use only. It may contain private, proprietary, or legally privileged information. No privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it, and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Health First reserves the right to monitor all e-mail communications through its networks. Any views or opinions expressed in this message are solely those of the individual sender, except (1) where the message states such views or opinions are on behalf of a particular entity; and (2) the sender is authorized by the entity to give such views or opinions. #####################################
