You're correct, in that there are products that can provide a more global repository. We used the Dilligent VTFOpen in a 2node cluster and achieved a 1200MBS write speed! Impressive, so if you don't need the de-dup the VtfOpen product really screams.
In one of a few large Data Centers we see 25TB per night (FS Incr and Full DB Backups) the Clustering feature that Diligent is working is huge for us, but we will not be the first on to bleed from it as we've already shed some blood, but you have to expect that when you are working with new technologies. I think the cluster feature for ProtectTier is first quarter 08, but its been a moving target for a year now. Many of you hear me speak to Diligent's product, we do have some older EMC CDL's and one Data Domain @ a remote. We did an RFP for Virtual Tape solutions 18months ago and landed on the Diligent Protectier because it was the only de-dupe VTL head that was accessible via fiber channel. Correct me if I'm wrong but DataDomain uses IP NFS mount to access the repository which just wouldn't scale in our environment, nothing against any of the other VTL / De-Dupers... It will be interesting to how the "Out of Band" de-duping VTL (Falconstor) pan out. Its either pay for the performance hit of de-duping up from or touching the data twice. Charles Hart Curtis Preston <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> 08/29/2007 02:07 PM Please respond to "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> To ADSM-L@VM.MARIST.EDU cc Subject Re: [ADSM-L] Data Deduplication >As de-dup, from what I have read, compares across all files >on a "system" (server, disk storage or whatever), it seems >to me that this will be an enormous resource hog Exactly. To make sure everyone understands, the "system," is the intelligent disk target, not a host you're backing up. A de-dupe IDT/VTL is able to de-dupe anything against anything else that's been sent to it. This can include, for example, a file in a filesystem and the same file inside an Exchange Sent Items folder. >The de-dup technology only compares / looks at the files with in its >specific repository. Example: We have 8 Protectier node in one data >center which equtes to 8 Virtual Tape Libraries and 8 reposoitires. The There are VTL/IDT vendors that offer a multi-head approach to de-duplication. As you need more throughput, you buy more heads, and all heads are part of one large appliance that uses a single global de-dupe database. That way you don't have to point worry about which backups go to which heads. Diligent's VTL Open is a multi-headed VTL, but ProtecTier is not -- yet. I would ask them their plans for that. While this feature is not required for many shops, I think it's a very important feature for large shops. This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately.
