> I'm showing my lack of knowledge on this one but I thought SAM-FS could > do something like this. Anyone know for sure?
It's not quite the same, and not out-of-the-box. SAM-FS has the ability to create an archive copy of files onto disk or tape when the files are closed after having been modified. These copies may not be made immediately; their timing depends on rules set by the system administrator. Hence they are not “instant” versions. More importantly, there is (currently) no easy way to retrieve an old version. When the archiver makes a copy, the location of the copy is logged. It is possible to use this log to retrieve an older copy even after the file has been overwritten, and there are several third parties who have written software which enables this. Things get trickier when tape recycling comes into play, since the recycler does not know about the desire to keep old versions. At sites which require recycling, the positions of old versions have to be logged into a new file system; or the recycler has to be replaced with a variant which understands versioning. Third parties have done both of these in the past, but we (Sun) don’t currently ship this. There are plans to add a more robust versioning feature to SAM-FS but I don’t believe there is a definite date or release attached yet. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
