-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 26/09/11 22:29, David Magda wrote: > Talking about "7.55 GB" is mostly useless as well. If it's a dozen > video files then stat()ing them all with be done very quickly by > just running find(1). If however the 7.55 GB is made up of > 7,550,000 files then going through them would take quite a long > time.
Point taken, although "zfs diff" time is (should) proportional to changes, not to number of files. > How long would it take for (say) rsync to walk two file systems > (or snapshot directories) to come up with the same list? Ten > minutes may seem like a lot in 'absolute' terms, but if something > like rsync takes an hour or two to stat() every file, then it's a > big improvement. "rsync" takes a bit less than 7 minutes. So "zfs diff" is actually slower!. > So the question is: by what metric are you comparing that you came > up with the "disappointing" conclusion? Why is ten minutes > disappointing? What would /not/ be disappointing to you? 8m? 5m? > 3.14 seconds? If I change 10 files in dataset with a trillion files, I would expect less than a couple of seconds. Given the tree walking pruning with "birthdate" age, I actually think this is reasonable (you skip over entire on-disk branches if there are no changes under them). - -- Jesus Cea Avion _/_/ _/_/_/ _/_/_/ j...@jcea.es - http://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/ jabber / xmpp:j...@jabber.org _/_/ _/_/ _/_/_/_/_/ . _/_/ _/_/ _/_/ _/_/ _/_/ "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ "El amor es poner tu felicidad en la felicidad de otro" - Leibniz -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQCVAwUBToDmlJlgi5GaxT1NAQKh7QP+OCokqiBNo79Tojtvy9aLztQy0T+mNMoh i5z9BW38h8xdTNHiUqp8qnYaK3c+t8kyl90ZPR42dCKAl3hkk11x695yZuvRp+bm IKO+CPHfQ+wu3G2hoWWwvoHEdiXRvpg2MRZxXXZnzqldthrlq0PtSpNAGctm5Apl Ca564U9dkes= =TeMO -----END PGP SIGNATURE----- _______________________________________________ zfs-discuss mailing list firstname.lastname@example.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss