Tim, iSCSI was a design descision at the time. Performance was key and I wanted to utilize being able to hand a LUN on the SAN to esxi, and use it as a raw disk in physical compatibility mode...however what this has done is that I can no longer take snapshots on the esxi server and must rely on zfs snapshot. Also I have multiple *nix virtual machines I need to worry about backing up and making sure that if all fails that the file systems are consistent...
Thanks, Greg On Mon, Jan 11, 2010 at 7:36 PM, Tim Cook <t...@cook.ms> wrote: > > > On Mon, Jan 11, 2010 at 6:17 PM, Greg <gregory.dur...@gmail.com> wrote: > >> Hello All, >> I hope this makes sense, I have two opensolaris machines with a bunch of >> hard disks, one acts as a iSCSI SAN, and the other is identical other than >> the hard disk configuration. The only thing being served are VMWare esxi raw >> disks, which hold either virtual machines or data that the particular >> virtual machine uses, I.E. we have exchange 2007 virtualized and through its >> iSCSI initiator we are mounting two LUNs one for the database and another >> for the Logs, all on different arrays of course. Any how we are then >> snapshotting this data across the SAN network to the other box using >> snapshot send/recv. In the case the other box fails this box can immediatly >> serve all of the iSCSI LUNs. The problem, I don't really know if its a >> problem...Is when I snapshot a running vm will it come up alive in esxi or >> do I have to accomplish this in a different way. These snapshots will then >> be written to tape with bacula. I hope I am posting this in the correct >> place. >> >> Thanks, >> Greg >> -- >> >> > What you've got are crash consistent snapshots. The disks are in the same > state they would be in if you pulled the power plug. They may come up just > fine, or they may be in a corrupt state. If you take snapshots frequently > enough, you should have at least one good snapshot. Your other option is > scripting. You can build custom scripts to leverage the VSS providers in > Windows... but it won't be easy. > > Any reason in particular you're using iSCSI? I've found NFS to be much > more simple to manage, and performance to be equivalent if not better (in > large clusters). > > -- > --Tim >
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