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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