How are you using it? As your disk cache? You have to store backups on it long term in order to get de-duplication.
--- W. Curtis Preston Backup Blog @ www.backupcentral.com VP Data Protection, GlassHouse Technologies -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Dirk Kastens Sent: Monday, August 27, 2007 12:31 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] Data Deduplication Hi, > Writing a de-dupe backup product isn't easy. EMC bought Avamar and > Symantec bought Data Center Technologies to get their respective > products. I don't know of any other de-dupe companies for IBM to > acquire, so they'll have to write their own. That may take them a bit > longer. We're just testing a deduplication disk array from DataDomain with TSM. The compression ratio is much less than promised by the sales people. During the last 10 days of incremental backups we only achieved a ratio of 2.6:1. The disk array is very expensive and for the money you can buy more disks than you need without compression. -- Regards, Dirk Kastens Universitaet Osnabrueck, Rechenzentrum (Computer Center) Albrechtstr. 28, 49069 Osnabrueck, Germany Tel.: +49-541-969-2347, FAX: -2470
