Another factor to consider: does the tape pool in question have collocation turned on? If so, then depending on the number of tapes in the pool, the type of collocation in effect and the number of client nodes or filespaces to be migrated, there could be a very large number of tape mounts occurring. With only two drives, and depending on the mount retention period specified on the device class, I could believe that an awful lot of that 10.5 hours might've been spent fiddling around with tape mounts, idle drives, etc., and not actually writing data.
Regards, Bill Bill Kelly Auburn University OIT 334-844-9917 > It also wouldn't hurt to verify that your library and drive code > (firmware) are up-to-date. > > -----Original Message----- > From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of > Jim Skinner > Sent: Thursday, October 20, 2005 11:36 AM > To: ADSM-L@VM.MARIST.EDU > Subject: Re: [ADSM-L] TSM Performance with 3584 LTO-2 Drives > > I believe the first thing to check is the zoning of the fiber channel > network. TSM server and disk in one zone and in a different zone put tsm > server and tape. We had a similar problem. > >>> [EMAIL PROTECTED] 10/20/05 11:22 AM >>> > Hi, > > We're recently connected a 3584 with one L52 frame containing 2 LTO-2 > fiber attached drives to our AIX server. We'll be using FAStT SATA > disk as a primary storage pool and migrating from disk to tape. Can > anyone with a similar setup provide any statistics on how this works > in the real world, i.e. MB/sec or GB/hour from disk to tape. > > A test migration of 259 GB (152422 files) took 10.5 hours to > complete. This seems like abysmally slow performance, or is it > reasonable with a large numbers of small files? > > TSM version: 5.3.1 > > MoveBatchSize 500 > MoveSizeThresh 512 > > AIX version: 5.1 > > Chet Osborn > Systems Programmer > Rensselaer Polytechnic Institute > > Jim Skinner > The University of Kansas Hospital > Westwood Campus > Information Technology Systems > 2330 Shawnee Mission Parkway, Suite 201/068 > Westwood KS 66205-2005 > 913-588-4787 > > > Confidentiality Notice: > The information contained in this email message is privileged and > confidential information and intended only for the use of the individual or > entity named in the address. If you are not the intended recipient, you are > hereby notified that any dissemination, distribution, or copying of this > information is strictly prohibited. If you received this information in > error, please notify the sender and delete this information from your > computer and retain no copies of any of this information. >
