Duane, You might consider re-architecting to take advantage of deduplication and replication opportunities. Put your remote site storage on a NetApp or Data Domain NAS device - both of which perform deduplication. Replicate the deduplicated data to your home site where you can also make a TSM backup to tape for a third copy if necessary.
I have a Data Domain device which has 5.7TB of data which deduplicates to 300GB - the 300GB is the amount of data that is replicated. My NetApp devices don't quite achieve the same deduplication ratio because the data is significantly different than what I store on the Data Domain (NetApp=live data, DD=VM backup data) but, I keep about 40TB synchronized between two sites on my NetApps over a 1G WAN. You will need to discuss with the various vendors how you data might deduplicate and what impact to application performance you might incur. These are my experiences - there are other disk vendors which may provide your environment with a better solution. This solution may require a significant departure in how you are currently doing business but it should be something you consider. Cheers Neil Strand Storage Engineer - Legg Mason Baltimore, MD. (410) 580-7491 Whatever you can do or believe you can, begin it. Boldness has genius, power and magic. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of Ochs, Duane Sent: Monday, August 24, 2009 12:54 PM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Large disk concerns/alternatives ? Good day everyone, I'm looking for some workable suggestions for larger lun backups. I'm talking 1.5tb and larger lun sizes. I have a number of remote sites that have large quantities of hi-res image files and they need an offsite backup solution. Usually we are notified before the disks go into production and the backups grow as the disk is populated. Normally not a big deal. Now we are in the middle of a large conversion for many remote sites which will require a full backup for all of the sites. And each has in excess of 6 tb of images. In addition we are also migrating a number of rogue sites to TSM which also have in excess of 4tb locally. I tried a test and ran one disk as a full over a 1gb pipe to 2tb of TSM diskpool on Sata disks. It has been running for 3 days. Not only is it not acceptable in a real DR scenario (Currently we restore to the same site as the TSM server then move data back in order of importance),but, it will also take weeks before I can safely say we are back to being fully backed up. Other than local backups for each site... has anybody come across a similar scenario and care to offer some advice. Some specifics: I have 3 TSM servers (AIX) with either a L700 or a T950 library. No data is backed up locally. All data is sent over the network to a remote TSM server. Thanks, Duane IMPORTANT: E-mail sent through the Internet is not secure. Legg Mason therefore recommends that you do not send any confidential or sensitive information to us via electronic mail, including social security numbers, account numbers, or personal identification numbers. Delivery, and or timely delivery of Internet mail is not guaranteed. Legg Mason therefore recommends that you do not send time sensitive or action-oriented messages to us via electronic mail. This message is intended for the addressee only and may contain privileged or confidential information. Unless you are the intended recipient, you may not use, copy or disclose to anyone any information contained in this message. If you have received this message in error, please notify the author by replying to this message and then kindly delete the message. Thank you.
