They do have hardware at the multiple sites for DR. This is a "hot" DR site as opposed to a cold site that you can do with tapes. This does fit our environment however. We have multiple data centers that are DR sites for each other. Currently we use TSM with VTLs at multiple sites and just replicate with backup stgpools over the WAN. In reality, we run into more bad tapes than we do with bad disks. I can't remember if I've ever had to run a "restore stg" on a VTL. We only use tape for long term stuff
Regards, Shawn ________________________________________________ Shawn Drew Internet [email protected] Sent by: [email protected] 06/23/2009 12:07 PM Please respond to [email protected] To ADSM-L cc Subject Re: [ADSM-L] TSM vs Avamar What does Avemar offer for DR purposes? I don't know any customers that are ready to totally rely on electrically powered disk drives as a DR solution. ------------------------------------------------------------------------ The recent CommVault topic inspired this one. Our EMC reps are doing a good marketing job for Avemar. While I'm not necessarily looking for ammo to shoot them down, I am having trouble finding the negatives of Avamar versusTSM. The main marketing claims that interested me: - Dedupe at the client. They also claim that since they can do it at the client, the ratio they can achieve is much higher than Falconstor or DataDomain backend deduplication. - They have some kind of directory tree hash marking. The claim for this is that if you have directories with millions of files, it will have hashes for each directory level. If one file changes, it can detect which directory has changed through these hashes and will prevent complete file system scanning for every backup. Sounds like it's an alternative for the TSM journaling feature. - They have some kind of Vmware appliance generation thing which they use to create long term archives assuming they won't fit on the million:1 deduped storage! As far as the negatives go, number one seems to be no analog to the independant adsm-l community. Which also seems to prevent finding more negatives. Also, the pre-sales engineer is a former TSM guy, which was a craft EMC move! Anyway, does anyone know any other negatives for Avamar vs TSM? I'd like to be able to ask more intelligent questions. Regards, Shawn ________________________________________________ Shawn Drew Regards, Nicholas This message and any attachments (the "message") is intended solely for the addressees and is confidential. If you receive this message in error, please delete it and immediately notify the sender. Any use not in accord with its purpose, any dissemination or disclosure, either whole or partial, is prohibited except formal approval. The internet can not guarantee the integrity of this message. BNP PARIBAS (and its subsidiaries) shall (will) not therefore be liable for the message if modified. Please note that certain functions and services for BNP Paribas may be performed by BNP Paribas RCC, Inc.
