> Hi Matt, > Interesting proposal. Has there been any > consideration if free space being reported for a ZFS > filesystem would take into account the copies > setting? > > Example: > zfs create mypool/nonredundant_data > zfs create mypool/redundant_data > df -h /mypool/nonredundant_data > /mypool/redundant_data > (shows same amount of free space) > zfs set copies=3 mypool/redundant_data > > Would a new df of /mypool/redundant_data now show a > different amount of free space (presumably 1/3 if > different) than /mypool/nonredundant_data?
As I understand the proposal, there's nothing new to do here. The filesystem might be 25% full, and it would be 25% full no matter how many copies of the filesystem there are. Similarly with quotas, I'd argue that the extra copies should not count towards a user's quota, since a quota is set on the filesystem. If I'm using 500M on a filesystem, I only have 500M of data no matter how many copies of it the administrator has decided to keep (cf. RAID1). I also don't see why a copy can't just be dropped if the "copies" value is decreased. Having said this, I don't see any value in the proposal at all, to be honest. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
