Madhan Kumar Balasubramanian wrote: > Hi Tim, > > Lofi is chosen as the default for globaldevices name space if there is a > no dedicated /globaldevices slice mounted at the time of sun cluster > configuration (scinstall). You will get a warning message that lofi > will be chosen towards the end. > > Regarding your question about the feature being "production ready" - > the feature is fairly new. The only problem we found during our testing > was globaldevices: lofiadm: could not unmap device /dev/lofi/127: No > such device or address > <http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6749797> > > But again, it was not very often noticed unless the system is recycled > every few minutes. Moving between lofi and a dedicated /globaldevices > partition is definitely possible. Others on the alias will correct me > if that is not the case.
Tim, I don't want to discourage your exploration, but I feel obligated to point out that the Solaris Cluster Express entitlement does not allow production use. Because of that, the release testing for SCX is not as thorough as testing for a production release. That's not to say that the feature might not be production ready in theory, just that we can't say that with any certainty. If and when the lofi globaldevices feature shows up in a production release, you can rest assured that it will be production ready (yes, I realize that's a tautology, but it's the best I can say at this point). That said, you can certainly use SCX to try out the feature and perform whatever testing you require to determine whether it's suitable for your environment. Thanks, Nick > > I don't have any numbers regarding performance though. > > Best Regards, > Madhan Kumar > > > Perkins, Tim 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? >> >> >> >> Thanks, >> >> >> >> --Tim Perkins >> >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> ha-clusters-discuss mailing list >> ha-clusters-discuss at opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss >> > _______________________________________________ > ha-clusters-discuss mailing list > ha-clusters-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss
