read/write benchmarking: UFS2 vs ZFS vs EXT3 vs ZFS RAIDZ vs Linux MDRAID

[Dan Naumov]

To continue the subject of filesystem benchmarking (search the list
for READ results posted a few days ago), here are some write and
read/write results:

Methodology: /data/5M and /data/1M have 5GB of data each in
randomly-ordered chunks 5MB and 1MB in size, respectively.
/data/zero.bin is a contiguous 8GB file. A process writes a burst of
5MB to a random location in /data/zero.bin once per second; other
processes read chunks from /data/1M or /data/5M as appropriate (and as
fast as possible) until the entire 5G dataset is read.

Contiguous Write Performance:
http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-contig-write.png
Random Access Read/Write (5mb read chunks):
http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-5MB-readwrite.png
Random Access Read/Write (1mb read chunks):
http://virtual.tehinterweb.net/livejournal/2009-06-22_zfs_diskperf/zfs-diskperf-1MB-readwrite.png

These results are from the following forum thread:
http://episteme.arstechnica.com/eve/forums/a/tpc/f/96509133/m/857002910041/p/4


Sincerely,
- Dan Naumov