Hi!
I've got a benchmark about "reiser4 on mysql" and found a remarkable
extremely low performance, i managed to turn off fsync() in
fs/reiser4/plugin/file/file.c (nullify the sync_unix_file() function),
but it STILL VERY SLOW. I could not found any information about both
in the mailing-list and google-groups. Here is the detail:
C2.26+I845G+256MB+WD80GB
Slackware 11.0(Vanilla 2.6.18.3+r4_patch+1.0.5)
mysql-5.0.24a
testing use the "sql-bench", all result in seconds.
Alter ATIS Big Connect Create Insert
Ext3.o 32 21 25 221 203 1979
JFS 15 21 25 223 114 1711
XFS 22 22 25 229 1091 1744
R3 29 20 25 224 194 1731
R4 70 73 27 276 2667 3499
nofsync 51 72 26 271 594 3227
Seems even R4 w/o fsync speeds up abit, it's still TERRIBLY SLOW.
could you tell me why?
THANKS!
