Hi,
I have a particularly uncomplicated setup (a desktop PC with a hard
disk) and I'm seeing particularly slow performance from btrfs. A `git
status` in the linux source tree takes about 46 seconds after dropping
caches, whereas on other machines using ext4 this takes about 13s. My
mail client (evolution) also seems to perform particularly poorly on
this setup, and my hunch is that it's spending a lot of time waiting on
the filesystem.
I've tried mounting with noatime, and this has had no effect. Anyone
got any ideas?
Here are the things that the wiki page asked for [1]:
uname -a:
Linux zarniwoop.blob 3.16.2-200.fc20.x86_64 #1 SMP Mon Sep 8
11:54:45 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
btrfs --version:
Btrfs v3.16
btrfs fi show:
Label: 'fedora' uuid: 717c0a1b-815c-4e6a-86c0-60b921e84d75
Total devices 1 FS bytes used 1.49TiB
devid 1 size 2.72TiB used 1.50TiB path /dev/sda4
Btrfs v3.16
btrfs fi df /:
Data, single: total=1.48TiB, used=1.48TiB
System, DUP: total=32.00MiB, used=208.00KiB
Metadata, DUP: total=11.50GiB, used=10.43GiB
unknown, single: total=512.00MiB, used=0.00
dmesg dump is attached.
Please CC any responses to me, as I'm not subscribed to the list.
Cheers,
Rob
[1] btrfs.wiki.kernel.org/index.php/Btrfs_mailing_list