01-19-2008, 07:15 AM
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 Re: Q: Cluster File System Reliability
nicc777 a écrit :
> Hi there,
>
> I am rather new to cluster file systems, so let me state my
> requirements, and hopefully the kind people here get point me in the
> right direction.
>
> Basically I want a file system spanning multiple physical hosts, but
> mounted on a server as a single mount point - almost like having some
> kind of RAID over various physical nodes. The idea is that if one node
> fails, the server should still be able to continue with processing
> (assume it's something like a database). I am hoping that when the
> failed file server(s) come back online, the "RAID" should be rebuild
> on the fly, like a real RAID. This will be first prize.
>
> If the above is not possible, or if the performance penalty is too
> high, I will also settle for a real time mirroring solution, but with
> one crucial requirement: the write on the remote file server (the
> mirror) should be guaranteed - in other words, first ensure the data
> is on the remote host before writing to the local host disc, and then
> only return to the system. I know this will also have a very negative
> impact on performance, but I am between a rock and a hard place with
> all the requirements (fast file system, but never ever loose any
> data).
>
> Perhaps my requirements can not be met, but then I at least need some
> pointer as to the next best thing.
>
> Any help will be greatly appreciated. I will feedback to the group in
> months to come as to what eventually worked for us (or didn't work and
> why).
>
> Thanks in advance.
>
> PS: if anybody knows something about battery backups for hard drives,
> and how to protect the hard drive cache in case of power failures etc,
> I would also like to hear some of your thoughts/learnings/experiences.
>
>
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