On Mon, Oct 6, 2008 at 2:50 PM, Perkins, Tim <tperkins at elynx.com> wrote: > I've recently been tasked with setting up a HA NAS cluster using Solaris > Express and Cluster Express on x86. I'd really like to keep my entire disk > (minus the boot partition) as ZFS. I've scoured through the mailing list > and the various wiki's out there for information on running Cluster > Express's /globaldevices on lofi to no avail. > > I'm hoping that someone on this mailing list will be able to answer my > questions, the main one being what the advantages and disadvantages of > running /globaldevices on a lofi device. Is the lofi support production > ready or geared more towards testing? When Solaris Cluster does support a > ZFS /globaldevices, will I be able to migrate off of lofi (assuming I opt to > go that route)? Is there a substantial performance penalty for using lofi?
There isn't a big difference between lofi or partition based global devices. LOFI global device will have an extra lofi device driver layer between the application and disk. The advantage for LOFI is ease of configuration. Disadvantage would be slightly slower booting - of the order of a few hundred milliseconds to a few seconds extra. Run time performance is almost the same between lofi and partition. Global devices is a pxfs mount of a UFS file system. To support ZFS based global devices, you would first need pxfs to support ZFS. That is nowhere in the plans right now. This feature is designed for production use. However as with any other feature, it has to be released in a production release of cluster to declare support. Next update release of cluster will have support for lofi. cheers Binu > Thanks, > > > > --Tim Perkins > > > > _______________________________________________ > ha-clusters-discuss mailing list > ha-clusters-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss > >
