Look for Quantum   (DXi products) 


Cordialement,

Matthieu CHAUSSOY
DGSI/DOSI/DII/Système/Ing & Supp. Système & Stockage
T : 01 71 53 37 29 - M : 06 28 09 87 43 - Fax : 01 71 53 46 40
matthieu.chaussoy AT sfr DOT com

5 rue Noël Pons - Rive Défense
92000 Nanterre
www.sfr.com 
 

-----Message d'origine-----
De : EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] De 
la part de Dag Nygren
Envoyé : samedi 4 septembre 2010 06:34
À : NETWORKER AT LISTSERV.TEMPLE DOT EDU
Objet : Re: [Networker] DataDomain competitors

fredag 03 september 2010 01:42:32 skrev  Davina Treiber:
> On 09/02/10 09:19, Mats Atari wrote:
> > Hello NetWorker list.
> > 
> > I am keen on your advice regarding deduplication devices for 
> > NetWorker backup environments.
> > 
> > I am all into doing with DataDomain, both VTL and NFS ways. However, 
> > not to blindfold myself to much - are there any competitors, which 
> > could compare with DataDomain today?
> 
> I don't know the market for dedup devices although I have worked with 
> DD lately and rather like them.
> 
> If you want cheap dedup options, there is lessfs on Linux and dedup 
> within ZFS. No idea how well these work.

Have played around with lessfs on Linux for some time and found that Networker 
savesets doesn't dedup well with fixed block dedupping. This is probably 
because the files in savesets almost always start at different positions within 
the device block and thus the block is different from last time even if the 
file hasn't changed. I just wish there was a feature in Networker to always 
start a file in a saveset on a device block boundary...
The compression feature of lessfs does give a around 50% gain, but a pure 
compressing filesystem would give you the same. (RFE someone influental... :-) )

Best
Dag


-- 
Dag Nygren                               email: dag AT newtech DOT fi
Oy Espoon NewTech Ab                     phone: +358 9 8024910
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FINLAND

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