Hi, I've got a large file - 20gigs - which is stored in a zfs dataset. I snapshotted the dataset and rsynced an newer, updated version of the same file - slightly larger, but with mostly unchanged data.
According to how rsync works, the actual sent data should be much less than the size of the file(s), however, I noticed that the used space of the dataset+snapshot was the combined size of the older and newer file. I found this a bit puzzling, because I was sort of expecting that the increase in size of dataset+snapshot should only be the size of the changed blocks. I guess that ZFS has no way of knowing what the smaller deltas are, that rsync use to re/construct the updated file, and will write every part to disk. But do you think it would be possible to create a version of rsync that worked more closely with ZFS in such a way that only the changes could be written to disk? comments/insight would be appreciated! -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
