On Mon, September 26, 2011 14:55, Jesus Cea wrote: [...] > real 10m0.272s > user 0m0.809s > sys 2m6.693s > """ > > 10 minutes to "diff" 7.55 GB is... disappointing. > > This machine uses a 2-mirror configurations, and there is no more > activity going on in the machine. ZPOOL version 29, ZFS version 5. > > Am I missing anything? [...]
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. 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. 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? _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
