Re: EMC Data Deduplication

From: Scott Sibert <>
Date: Fri, 5 Nov 2010 07:48:38 -0500
Message-ID: <>

pre 10g did not have compression built-in to RMAN. Adding it was a huge benefit. 8.x-9.x RMAN backups would be much bigger than 10g+ RMAN backups.

We're also looking at a dedup device and somehow using it to replicate to a different-state DR site. But we ship logs to standbys at that site so we don't think this dedup will help us much. To use this dedup for archive log shipping it seems like we'd have to not use the regular standby shipping and write code to look to a location on the dedup device and then have it apply the logs to the standby. Is anyone using dedup devices in this sort of manner?

On Fri, Nov 5, 2010 at 4:55 AM, Jason Khym <> wrote:

> I am an oracle DBA at a large ulitity company in the Southeastern US. Our
> IT shop is considering buying this product for our server,email and database
> backups. It would replace Veritas Netbackup Server and Tape libraries. I
> was wondering if anyone on the list has any experience with the product.
> We current at taking full level 0 hot backups on all of our production
> databases every night. So I know a dedup product like this would save us
> alot of backup space. I also realize that RMAN incremental backups with
> Block Change Tracking would give us the same benefit with less cost. We
> haven't had time to implement this as a backup standard yet. Our db engineer
> tried using incremental backups back in 8i or 9i and said it was not
> reducing the backup size. He later found out he needed to enable BCT to see
> the full size reduction. Our IT engineers want us(DBAs) to write RMAN
> backups directly to this dedup servers. I am not sold on that idea. I would
> like to continue to write our backup to ATA SAN storage and have the backups
> pulled to the dedup devices.
> Overall, what do you think of this product? Any gotchas or leasons learned
> that can be shared?

Received on Fri Nov 05 2010 - 07:48:38 CDT

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