Re: fbsd & fibre channel & SANs

From: Jerry McAllister (jerrymc_at_clunix.cl.msu.edu)
Date: 09/18/03

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    To: dnelson@allantgroup.com (Dan Nelson)
Date: Thu, 18 Sep 2003 10:42:13 -0400 (EDT)

    >
    > In the last episode (Sep 17), Eric said:
    > > I'm trying set up a cluster of freebsd fileservers sharing a common
    > > set of volumes/drives/raids over netatalk to a bunch of OS 9 clients.
    > > Each fileserver has a Qlogic 2100 fibre channel card connected to a
    > > switch. Also connected to the switch are several fibre channel raid
    > > controllers, with raids attached to them. I have no problem mount and
    > > using the raid volumes on the freebsd servers.
    > >
    > > What I'd really like to do is mount the same volume on two or more
    > > servers, which I can do, but one server does not know about the other
    > > server's changes to the disk. I'm sure this results in files being
    > > overwritten since each server thinks it owns the disk. I'm sure
    > > things like softupdates compund my problem even more.
    >
    > You would need a shared storage filesystem; GFS is the only one I know
    > of, and that's Linux-only.

    > > Is there a way to have two machines share a disk, and communicate
    > > between them (over the network?) the changes? I've seen AFS, and it's
    > > mostly what i'm trying to do, but it doesn't work with OS 9 clients.
    > > I want an OS 9 client to be able to pick a server in the cluster
    > > (from their chooser) and be presented with the same shared volumes,
    > > regardless of the chosen server. Any help??
    >
    > AFS looks like it replicates files onto multiple servers, so if one
    > goes down the data is still available somewhere else. The servers do
    > not share backend filesystems.

    Don't you just wish OpenAFS for FreeBSD (and some of the others) was
    finished and ready to go. That would be so wonderful.

    ////jerry

    >...
    >
    > --
    > Dan Nelson
    > dnelson@allantgroup.com
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