ADSM-L

Re: [ADSM-L] SANERGY

2007-10-03 06:06:12
Subject: Re: [ADSM-L] SANERGY
From: CAYE PIERRE <Pierre.Caye AT ALCATEL-LUCENT DOT FR>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 3 Oct 2007 12:03:41 +0200
Thanks Remco

It concerne which release of SANergy ?

Regards

Pierre Cayé 

> -----Message d'origine-----
> De : ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] De 
> la part de Remco Post
> Envoyé : mardi 2 octobre 2007 18:56
> À : ADSM-L AT VM.MARIST DOT EDU
> Objet : Re: [ADSM-L] SANERGY
> 
> CAYE PIERRE wrote:
> > Hi,
> >
> > I am looking for feedback about use of SANergy.
> >
> > Looking for impressions, efficiency, applicable domains, 
> problematics, 
> > difficulties and so.
> >
> > I am studying possible implementation of SANergy for backup 
> purpose in 
> > wintel world (with AIX/TSM Server).
> >
> > Regards,
> >
> > Pierre
> 
> 
> I have one big problem with SANergy, and that is that it 
> requires a preload of a specific library on the 'client' to 
> overload filesystem calls in those cases where a SANergy FS 
> is involved. Thus it is a complete user-space solution and 
> users might break their environment and thus make sanergy 
> behave as a normal NFS filesystem.
> 
> I've had (but this was way way back) problems starting apache 
> when the sanergy libc was preloaded on at least one system, 
> so at least at that time sanergy was actually capable of 
> breaking working applications.
> 
> Both experiences at that time made me decide that sanergy was 
> not ready for production and I'd recommend against using it. 
> If TSM were to support another SAN shared filesystem across 
> your platforms in the future, one that does solve filesystem 
> problems where they belong (in the kernel or at least below 
> the VFS layer), that might solve your problems without 
> introducing many new ones.
> 
> Remember, that neither sanergy or anything like it, nor 
> lan-free are free of charge, so maybe upgrading your lan 
> and/or server might be cheaper for those nodes.
> 
> 
> --
> Met vriendelijke groeten,
> 
> Remco Post
> 
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