Good discussion. We also use a DD690 onsite and replicate to 2 DD580's at remove sites.
We are not using the VTL function, just mounting them up NFS to our AIX TSM server (v5.5). NFS performance is good enough for us to not need the extra expense of the VTL functions. We are using device type of FILE with a size of 50GB/vol. We were running the 1Gb NICs at about 100MB/second, so we recently added a 10Gb NIC for better throughput. Positives: Replication works great, as the dedupe lets us use a much smaller WAN connection to move the data compared to the original size. Current Dedupe rate 14.9x, typically around the 12-14x range. Fitting 340TB of data on 23TB of disk is very cool. Mixture of all types of data: filesystems, server OS, SQL, Exchange. In some cases we have the DBAs dump directly to the DD and bypass TSM for faster DR recovery (they can get the files before TSM is back up). Negatives: It is difficult to hunt down data that is not deduping well. It seems to take a combination of: 1. Looking for new volumes in that stg pool (q volhist typ=stgnew) 2. Looking at the dedupe rate on that volume (filesys show compression /backup/xxx/xxx.BFS) 3. Once you have the vols that have poor compression, Looking to see what TSM has on the volume. Easier if you are using collocation. (q vol /BACKUP/xxx.BFS count=100). 4. Then figure out what you are going to do with that non-compressible data. We still have a Tape library attached for some non-critical data we can put on LT04 tape and conserve DD space. GUI is poor, but it has gotten somewhat better in V 4.9.2. Had problems with Windows 2008 R2 AD authentication, but that has now been fixed. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Tim Brown Sent: Thursday, June 16, 2011 1:50 PM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] tsm and data domain Any one use emc's data domain devices for storage pools and replication Would like to here positive and negative issues. Thanks, Tim Brown Systems Specialist - Project Leader Central Hudson Gas & Electric 284 South Ave Poughkeepsie, NY 12601 Email: tbr...@cenhud.com <<mailto:tbr...@cenhud.com>> Phone: 845-486-5643 Fax: 845-486-5921 Cell: 845-235-4255 This message contains confidential information and is only for the intended recipient. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, please notify the sender immediately by replying to this note and deleting all copies and attachments. The BCI Email Firewall made the following annotations --------------------------------------------------------------------- *Confidentiality Notice: This E-Mail is intended only for the use of the individual or entity to which it is addressed and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you have received this communication in error, please do not distribute, and delete the original message. Thank you for your compliance. You may contact us at: Blue Cross of Idaho 3000 E. Pine Ave. Meridian, Idaho 83642 1.208.345.4550 ---------------------------------------------------------------------