On Sun, 9 Dec 2012 06:17:39 +0100 (CET) Jan Engelhardt <[email protected]> wrote:
> > 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). CoW filesystem incurs fragmentation by its nature, not specifically snapshots. Even without snapshots, rewriting portions of existing files will write the new blocks not over the original ones, but elsewhere, thus increasing fragmentation. -- With respect, Roman ~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Stallman had a printer, with code he could not see. So he began to tinker, and set the software free."
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