[Btrfs-devel] btrfs stability

[Rekrutacja119]

running postmark with numbers set to 20 000, transactions to 10 000 and
subdirectories to 20 000 i have following results with btrfs:
    24 seconds total
    11 seconds of transactions (909 per second)
Data:
    26.48 megabytes read (1.10 megabytes per second)
    136.18 megabytes written (5.67 megabytes per second)

same for xfs is:
Time:
    70 seconds total
    52 seconds of transactions (192 per second)
Data:
    26.48 megabytes read (387.33 kilobytes per second)
    136.18 megabytes written (1.95 megabytes per second)

it looks MUCH worse with more realistic setup, of 100 000 subdirs, 100 000
files and 20 000 transactions. xfs slowed to 65KB/s !! on 4 drive RAID5 (new
drives, just bought, seagete 500GB ones)
btrfs was stable

ext3 tests not possible because it would take like a day. (it is creating
subdirs very very slow)
ext4 is the same as ext3
reiserfs is comparable speed to xfs
reiser4 is comparable speed to btrfs

i only tested with postmark, as this is going to be users file array, with
files up to 3MB, and mostly in 5-50KB range
so no need to test how many MB/s it can copy with large files

also - how can i turn on dir_index on xfs? i think it's mkfs.ext3 option
(and it is default on in /etc/mke2fs.conf)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://oss.oracle.com/pipermail/btrfs-devel/attachments/20080308/0e4f2bb5/attachment.html