Hi Sanjeev and Milek, thanks for your replies but I'm afraid they are somewhat missing the point. I have a situation (and I believe it would be fairly common) where early snapshots would be sharing most data with the current filesystem and more recent snapshots are holding onto data that has been deleted from the current filesystem (after a recent big deletion of unused data).
It is impossible to see what snapshots would need to be deleted to free up the space that was deleted from the current fs, without deleting the snapshots one by one. I think in any filesystem it is reasonable to expect to be able to determine what entities use up disk space. But ZFS is currently lacking this for snapshots. See the below "USED" column. The total "USED" adds up to about 11G. However the total data consumed by the snapshots is more in the range of 100G. But from the listing below it is simply impossible to see which snapshots are using it. NAME USED AVAIL REFER MOUNTPOINT storage 457G 127G 28.4K /storage storage/myfilesystem 457G 127G 251G /storage/myfilesystem NAME USED AVAIL REFER MOUNTPOINT [EMAIL PROTECTED] 0 - 28.4K - [EMAIL PROTECTED] 0 - 28.4K - storage/[EMAIL PROTECTED] 4.26G - 187G - storage/[EMAIL PROTECTED] 61.1M - 206G - storage/[EMAIL PROTECTED] 773M - 201G - storage/[EMAIL PROTECTED] 33.2M - 192G - storage/[EMAIL PROTECTED] 62.6M - 212G - storage/[EMAIL PROTECTED] 5.29G - 217G - -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss