Re: fbsd fibre channel SANs
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 [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: fbsd fibre channel SANs
On Thu, Sep 18, 2003 at 10:42:13AM -0400, Jerry McAllister wrote: 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. Oh, would that be *great*. I've never even been able to get any of the snapshots running, as my i386 machines are all -STABLE and it doesn't like compiling on sparc64. -T -- Always listen to experts. They'll tell you what can't be done and why. Then do it. - Robert Heinlein ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
fbsd fibre channel SANs
hello all.. 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. 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?? thanks eric ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: fbsd fibre channel SANs
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. The best solution today would be to have one master server that mounts all the volumes (with softupdates, but short cache times), and one standby server that polls the master and as soon as it stops responding to pings, mounts the filesystems, ifconfigs an alias IP to take over the master's IP, and kicks off background fscks to clean up the filesystems. If the servers are stable, you can probably spread the filesystems across multiple servers, then cross-nfs-mount everything so the netatalk clients see the same set of volumes on each server. Some will end up going over NFS to get to the server really mounting the filesystem, though, so make sure your server-server links are high-bendwidth. -- Dan Nelson [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
