Am Sonntag, 9. Dezember 2012 schrieb Jan Engelhardt: > On Sunday 2012-10-07 16:48, Martin Steigerwald wrote: > >> > >> # btrfs su li / > >> ID 256 top level 5 path UBUNTU > >> ID 259 top level 5 path UBUNTU/@ > >> ID 261 top level 5 path UBUNTU/@tmp > >> ID 262 top level 5 path UBUNTU/@home > >>[...] > > > >This could be 100 or more subvolumes / snapshots. > >Maybe slowness could be related to this one. > > Absolutely. COW snapshots cause severe fragmentation (it's > in their nature). "Easily" reproducible by snapshotting an fs > every day. Been there, had that.
So such a workload is only possible with pleasing speed with SSD? I have about 5-10 snapshots on my backup 2TB eSATA disk which I currently rsync to. This seems to work quite well still. But I have no idea how that would turn out with 100 snapshots or more. And about 1 TB is free, so at least I´d expect no serious freespace fragmentation like on the BTRFS in my SSD (extra post for that one). Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
