I downloaded 1.38, and then the
http://brick.kernel.dk/snaps/fio-git-latest.tar.gz. Both exhibited
identical behavior.
Both built with no problems on a centos-5.4 x86-64 box.
REPORTING-BUGS mentioned cat .git/HEAD, so I'll report it:
ref: refs/heads/master
Goal:
To benchmark randomly accessing a 1GB file with different blocksizes
to see how blocksize effects bandwidth.
rand.fio:
[random-read]
rw=randread
size=128m # just enough to get the numbers
filesize=1G # make sure the seek distance is randomly over 1GB file
directory=/mnt/tmp
blocksize=1024k
BTW, the fio.1 page says:
blocksize=int[,int], bs=int[,int]
Block size for I/O units. Default: 4k. Values for reads and
writes can be specified seperately in the format read,write,
either of which may be empty to leave that value at its default.
BTW, that should be separately not "seperately"
So since I wanted to vary the blocksize I figured I'd do it on the
command line so I said:
./fio --showcmd ~/rand.fio
fio --name=random-read --rw=randread --size=128m --filesize=1G
--directory=/mnt/tmp --blocksize=1024k
To I tried to run it:
./fio --name=random-read --rw=randread --size=128m --filesize=1G
--directory=/mnt/tmp --blocksize=1024k
./fio: unrecognized option `--blocksize=1024k'
I tried to use the config file except for the blocksize. I deleted the
blocksize= line from rand.fio and:
./fio --blocksize=1m ~/rand.fio
./fio: unrecognized option `--blocksize=1m'
Potential fixes:
1) fix showcmd to report a different flag for setting --blocksize
2) fix fio to accept --blocksize
Expected behavior:
I expected ./fio ~/rand.fio to work exactly like the arguments reported
by ./fio --showcmd.
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