On the flip side because things like NetBackup do the work on the system being backed up it increases CPU resource consumption. For us that would be a killer. We've been using Data Domain for a couple of years on UNIX/Linux/Windows and have been quite happy with the dedupe ratios we get on everything including Oracle and MS-SQL databases. Additionally restores from the dedupe devices as compared to tape are incredibly fast.
As others pointed out it does depend on what you're backing up. Dedupe is great for environments where the preponderance of what you're backing up isn't changing. Note that on the DD it is block level rather than file level so this doesn't mean your database files can't change (as they do every time they're update). I'm not sure how NBU's dedupe does it (file or block). -----Original Message----- From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of stefanos Sent: Wednesday, August 25, 2010 4:02 AM To: 'Travis Kelley'; judy_hinchcli...@administaff.com; cal...@kforce.com; veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Question for NetBackup 7.0 Dedup user ORData Domain users The big difference between DataDomain (and all appliances) and nebackup deduplication option is that netbackup can do the process on the client. This will speed up the time of the backup. With DD and netbackup media server deduplication, nothing will change at your backup time, as all your data will travel to the media server. Do not listen to the companies about the deduplication ratio. Your data is unique, and nobody can predict the ratio. Ask for a demo from both companies. -----Original Message----- From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Travis Kelley Sent: Wednesday, August 25, 2010 12:38 AM To: judy_hinchcli...@administaff.com; cal...@kforce.com; veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] Question for NetBackup 7.0 Dedup user OR Data Domain users Data domain also has a limit to the amount of data one of their units can track but its fairly high. If you need more than 32TB of deduped data in PD you do need to deploy a seperate puredisk environment. Then PD just splits the hash space into chunks and stores data on whichever node it hases to. I'm not sure what their upper limit is but it can scale quite high also. On 8/24/10, judy_hinchcli...@administaff.com <judy_hinchcli...@administaff.com> wrote: > Remember that the built in de-dup as a limit on the amount of data it can > keep track of. > Over that amount you need to use a de-dup appliance. > > > From: veritas-bu-boun...@mailman.eng.auburn.edu > [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of Alley, Chris > Sent: Tuesday, August 24, 2010 4:09 PM > To: veritas-bu@mailman.eng.auburn.edu > Subject: [Veritas-bu] Question for NetBackup 7.0 Dedup user OR Data Domain > users > > We are looking to change our backups to a disk based deduplication solution, > and 2 of our options are to utilize NetBackup 7.0's built in dedupe (Client > and Media server) or to put a Data Domain box in. I wanted to see if I > could get some real world feedback on what you guys have been seeing in > terms of dedupe rates, performance, etc. For example Data Domain claims we > would only see about 5:1 dedupe rate using NetBackup, which seems quite a > bit lower than what I would expect....and of course they claim they would > get about 20:1. I realize that all data is different, which is why I have > hopes that several people will reply with what they are seeing. Thanks for > your time! > _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu Proud partner. Susan G. Komen for the Cure. Please consider our environment before printing this e-mail or attachments. ---------------------------------- CONFIDENTIALITY NOTICE: This e-mail may contain privileged or confidential information and is for the sole use of the intended recipient(s). If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you. ---------------------------------- _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
