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SubjectA few filesystem benchmarks w/ReiserFS4 vs Other Filesystems
Are balanced b-trees better for removing many files over dancing onces?
See rm -rf benchmark.

# -------------------------------------------------------------------- #
Filesystems to test:
# -------------------------------------------------------------------- #
Each file system was created with fdisk to be +1024MB.
# -------------------------------------------------------------------- #
With default initilization commands: mkfs.fs /dev/hdb[1-7]
# -------------------------------------------------------------------- #
Filesystem Size Used Avail Use% Mounted on
/dev/hdb1 962M 20K 913M 1% /fs/ext2
/dev/hdb2 962M 17M 897M 2% /fs/ext3
/dev/hdb3 977M 33M 945M 4% /fs/reiser3
/dev/hdb5 929M 144K 929M 1% /fs/reiser4
/dev/hdb6 973M 256K 973M 1% /fs/jfs
/dev/hdb7 973M 144K 972M 1% /fs/xfs
# -------------------------------------------------------------------- #
Untar the Linux 2.6.8.1 tarball on each file system.
# -------------------------------------------------------------------- #
ext2 | 46.88 sec @ 10% cpu
ext3 | 44.44 sec @ 12% cpu
jfs | 57.36 sec @ 15% cpu
rs3 | 37.03 sec @ 23% cpu
rs4 | 27.42 sec @ 42% cpu
xfs | 49.74 sec @ 17% cpu
# -------------------------------------------------------------------- #
Execute rm -rf linux-2.6.8.1 on each file system.
# -------------------------------------------------------------------- #
ext2 | 10.26 sec @ 22% cpu
ext3 | 10.02 sec @ 25% cpu
jfs | 26.67 sec @ 27% cpu
rs3 | 03.22 sec @ 74% cpu
rs4 | 25.58 sec @ 50% cpu <- What happened to reiserfs4 here?
xfs | 12.51 sec @ 47% cpu
# -------------------------------------------------------------------- #
Create a 500MB file with dd to each filesystem with 1MB blocks.
# -------------------------------------------------------------------- #
ext2 | 15.72 sec @ 26% cpu
ext3 | 17.04 sec @ 31% cpu
jfs | 29.57 sec @ 25% cpu
rs3 | 15.21 sec @ 27% cpu
rs4 | 23.96 sec @ 23% cpu <- What happened to reiserfs4 here?
xfs | 19.07 sec @ 29% cpu

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