If I have a directory with a bazillion files in it (or, let's say, a directory subtree full of raw camera images, about 15MB each, totalling say 50GB) on a ZFS filesystem, and take daily snapshots of it (without altering it), the snapshots use almost no extra space, I know.
If I now rename that directory, and take another snapshot, what happens? Do I get two copies of the unchanged data now, or does everything still reference the same original data (file content)? Seems like the new directory tree contains the "same old files", same inodes and so forth, so it shouldn't be duplicating the data as I understand it; is that correct? This would, obviously, be fairly easy to test; and, if I removed the snapshots afterward, wouldn't take space permanently (have to make sure that the scheduler doesn't do one of my permanent snapshots during the test). But I'm interested in the theoretical answer in any case. -- David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
