On Wed, Nov 4, 2009 at 2:48 AM, Nils Goroll <slink at schokola.de> wrote: > Hi All, > > could anyone give me a brief summary of the technical reasons why UFS > snapshots are not supported in cluster? > > Some reasons I could imagine: > - The PxFS layer is incompatible with UFS snapshots (does not sound > likely?!?) > - failover of the PxFS master conflicts with snapshots
fssnap needs to be run on the UFS mount point directly. It works closely with in-memory data structures of UFS. Thus if fssnap has to work with PxFS, PxFS client and server (master) needs to be able to understand fssnap ioctl. IIRC this support is not present in PxFS today. As you know already, once a PxFS mount is done you don't have access to the on-disk UFS mount. The only access is through the client mounts. In addition fssnap needs local storage where the UFS file system is. Thus technically this is not a very simple feature to implement either. cheers Binu > - issues with HAStoragePlus > > Any of the above? Anything else? > > A rough sketch of what would need to be done to support UFS snapshots would > be ideal. > > Thanks, Nils > _______________________________________________ > ha-clusters-discuss mailing list > ha-clusters-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss >
