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01-16-2008, 03:06 PM
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 Re: multiple attached storage Andreas Buschmann <buschman@asys-h.de> wrote: > 1) What I want to do is to have one filesystem mounted on both servers, > which is accessed by both servers in parallel. That's a specialty product. Most filesystems (UFS, VxFS, ZFS) don't support that. Some that do are: Sun QFS Veritas Cluster Filesystem (probably needs cluster volume manager, too) ADIC StorNEXT > I want to have two (nearly) identical servers, so I can disconnect > one of them for a software / hardware upgrade. > How do I atach the storage array on the filesystem side? > The salesman told me something, but was not very helpful on the > software side. > I do not know which product I need, and I do not know the right > words for what I want. > For the application I do not need a cluster in the "single system > image" meaning (as described by Pfinster). > I would very much like having an extra IP Address, which moves > between the servers, but this could be done by the loadbalancer. Most HA/cluster solutions can manage that. If you have a single IP that moves between the servers, could you move the filesystem between them too? The simultaneous mount is the hard part. If it was only mounted on one at a time, then the need for the special filesystem is gone. > 2) Alternatively I could use one of the V240 with internal disks or > an external array as an NFS Fileserver. That's a common way to do it. > But, when I configured CacheFS on the second T2000 it told me, > that CacheFS and NFSv4 do not work with each other. I think that's because v4 introduces its own protocol for allowing the application to access and control some of the caching parameters. -- Darren Dunham ddunham@taos.com Senior Technical Consultant TAOS http://www.taos.com/ Got some Dr Pepper? San Francisco, CA bay area < This line left intentionally blank to confuse you. >      |
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