We started out with 4GB volumes and have moved to 10GB volumes. Both have worked fine - we predefine them on Windows 2003 - TSM 5.3 so that the volumes do not become fragmented at the OS level.
We currently have a size limit on this pool so that "large" files are still stored on tape. (Our current "large" value is 2GB and really depends on how much disk we have.) We are also trying out Exchange backups on a devtype=file pool and have used 100GB volumes for this. We are currently not collocating. My original thoughts were that multi-session restore would perform better with no collocation and some original testing I did with this showed these results. See the "Understanding Disk Storage in TSM" at http://tsm-symposium.oucs.ox.ac.uk/contributions.html for some good info on collocation and volume sizes. This suggests that you might want to collocate (at least at some level). FYI - I just did a multi-session restore test of a Windows 2003 file server with data on the above 10GB file pool with the following results: # of Objects - 164,674 Aggregate KB - 41,083 Elapsed time - 00:20:28 This data was actually compressed, the source being 58.3 GB (so the actual throughput is 49,781 KB/sec). In this case the client CPU was probably the bottleneck. Tim Rushforth City of Winnipeg -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Spearman, Wayne Sent: Monday, December 05, 2005 3:34 PM To: [email protected] Subject: [ADSM-L] Disk Only backups We are planning to move a large number of our nodes to "disk only" backups and eliminate tape for them. The diskpools will be devtype=file. I struggle with whether to collocate these disk volumes or not and how large to make them. I've had some discussions with IBM, but would like to ask others to share their experiences with me. Any input would be welcome. Thanks, Wayne ----------------------------------------- This message and any included attachments are from NOVANT HEALTH INC. and are intended only for the addressee(s). The information contained herein may include trade secrets or privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you received this message in error, or have reason to believe you are not authorized to receive it, please promptly delete this message and notify the sender by e-mail. If you believe that any information contained in this message is disparaging or harassing on the basis of gender, race, age, disability, religion, or national origin, please contact Novant Health, Inc. at 1 -888-378-8250 or 1-800-350-0094 or forward the e-mail to [EMAIL PROTECTED] Thank you.
