ADSM-L

Re: [ADSM-L] What to dedup.. was "TSM being abandoned?"

2008-04-17 12:20:24
Subject: Re: [ADSM-L] What to dedup.. was "TSM being abandoned?"
From: Curtis Preston <cpreston AT GLASSHOUSE DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 17 Apr 2008 12:14:12 -0400
That is where it is most beneficial in a TSM environment, but it will
also find redundant blocks of data between the different versions of
individual files that TSM is saving.

---
W. Curtis Preston
Backup Blog @ www.backupcentral.com
VP Data Protection, GlassHouse Technologies 

> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
> Henrik Vahlstedt
> Sent: Thursday, April 17, 2008 6:07 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: [ADSM-L] What to dedup.. was "TSM being abandoned?"
> 
> 
> Hi,
> 
> Isnt dedup most beneficial at deduplicating databses ex. Oracle and
> Domino etc...? No pre-compression or encryption.
> Even Data Domain dedup thoose types av data pretty well.
> 
> But I tend to agree with your opinion about performance.
> 
> //Henrik
> 
> 
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
> Hans Christian Riksheim
> Sent: den 17 april 2008 14:32
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: [ADSM-L] TSM being abandoned?
> 
> We look at dedup VTL as a possible target for active storage pools
> containing ordinary file backup. This way we don't risk very much if
the
> VTL breaks or the VTL's dedup index goes corrupt. I am a little
> sceptical about the robustness of these products so I will not let
these
> VTL's play a too significant role in our setup. My sceptisism may of
> course be totally unfounded.
> 
> For TDP-data which are written and read in large sequential chunks,
tape
> is just fine performance and cost wise. From what I have heard, it can
> be hard to obtain any decent dedup compression for Oracle with dedup
> VTLs and the performance is questionable.
> 
> 
> 
> 
> Best regards
> 
> Hans Chr.
> 
> 
> 
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of
> Orin Rehorst
> Sent: Wednesday, April 16, 2008 4:13 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: TSM being abandoned?
> 
> A VTL vendor said he is seeing a number of mid-sized businesses
> migrating from TSM to NBU (Symantec). Do you think this is true? My
> concern is that the pool of support techs will shrink and put us in a
> bind.
> 
> Regards,
> Orin
> 
> Orin Rehorst
> Port of Houston
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