Veritas-bu

Re: [Veritas-bu] NBU7 / De-Dupe?

2010-04-06 12:12:51
Subject: Re: [Veritas-bu] NBU7 / De-Dupe?
From: scott.george AT parker DOT com
To: veritas-bu AT mailman.eng.auburn DOT edu
Date: Tue, 6 Apr 2010 12:10:35 -0400
I have been working on this as well, trying to get media server dedup working.  I am caught in a type of chicken/egg loop.  I can't create a PureDisk storage unit, because I don't have a disk pool, but when I go to create a disk pool, I don't have any volumes available.  Just exactly what volume is it looking for?  Googling around, it would appear that my media server doing the dedup would need to be PDOS.  The documentation says that RHEL 5 is a supported OS for media server dedup.  What gives?

BTW to Justin, there is no way to dedup to tape.  None, nada, never.




From: Justin Piszcz <jpiszcz AT lucidpixels DOT com>
To: "Chapman, Scott" <Scott.Chapman AT icbc DOT com>
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Date: 04/06/2010 12:03 PM
Subject: Re: [Veritas-bu] NBU7 / De-Dupe?
Sent by: veritas-bu-bounces AT mailman.eng.auburn DOT edu





I believe you are correct, I asked if it was possible to do it with tape
(crazy!) idea but no response yet =)  It looks like its limited to
Puredisk/NBU7 disk tool.

On Tue, 6 Apr 2010, Chapman, Scott wrote:

> Has anybody tried client side de-dup with something other than a
> puredisk pool?  (puredisk or netbackup 7 disk pool)  It is my
> understanding (which could be incorrect;-) that you can't use netbackup
> 7 client side de-dup with any other type of disk pool.  ie  you can't
> use data domain on the backend when using client side dedup.
>
>
>
> Thanks!
>
>
>
> Scott Chapman
>
> Senior Technical Specialist
>
> Storage and Database Administration
>
> ICBC - Victoria
>
> Ph:  250.414.7650  Cell:  250.213.9295
>
> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> [
mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of David
> Stanaway
> Sent: Friday, April 02, 2010 6:29 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] NBU7 / De-Dupe?
>
>
>
>
> These number aren't that hot compared to DataDomain from my use of it.
>
> We are seeing 86TB of backup images occupying 4.4TB of phys disk.
>
> On 4/1/2010 12:07 PM, Jon Bousselot wrote:
>
> I set it up in a small test environment, and started backing up three
> clients into a deduplication pool exclusively.  2 windows and 1 linux
> system
>
> The first pass wasn't that impressive, maybe a 5% to 10% de-dup ratio
> and it took a bit longer than just streaming that same data to tape or
> disk.
>
> The second pass had a 90% deduplication ratio, mostly because just 1
> week had passed since the first full backup and not every file changed.
>
>
> After three weeks, I had about 300GB of data deduplicated down into
> about 90GB of disk space.  The kbytes total reported from the catalog
> said 300G, and df -k said 90G.
>
>
>
> The data content of the three systems is typical for a user workstation.
> Email, photos, miscellaneous files.  De-dup let me put many versions of
> those same files into a backup without actually having many copies of
> that file spinning on disk.
>
>
>
> And then the disk holding the de-duplicated data developed a bunch of
> bad sectors and I lost it all.  Once I rebuild it, I'll check out the DR
> process for protecting your de-dup database and files.
>
>
>
> I also want to test client side de-duplication to see if that helps
> stream data compared to media server de-duplication alone.  The
> media/master server is a quad core with 8g ram, and the clients are a
> desktop and a laptop.  After seeing it run and observing the space
> savings it generates, I think it is a very creative way to solve some
> (not all) problems.  It is definitely not a "set it and forget it"
> technology.  You still need to monitor its utilization similar to how
> you would monitor basic disk or tape usage.
>
>
>
> -Jon
>
>
>
> ________________________________
>
> From: Justin Piszcz <jpiszcz AT lucidpixels DOT com>
> <
mailto:jpiszcz AT lucidpixels DOT com>
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Sent: Thu, April 1, 2010 3:27:36 AM
> Subject: [Veritas-bu] NBU7 / De-Dupe?
>
> Hi,
>
> Is anyone using de-dupe?
>
> What kind of savings are you seeing?
>
> Justin.
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