On 10/27/2015 02:33 PM, Hyukjoong Kim wrote:
Hi,
I'm trying to replay iolog using fio iolog, but i failed with that.
simply, I check the example trace with write_iolog option, and I got
trace like this,
--------------
fio version 2 iolog
/mnt/test/rand-write.1.0 add
/mnt/test/rand-write.1.0 open
/mnt/test/rand-write.1.0 read 64757760 4096
/mnt/test/rand-write.1.0 read 794873856 4096
/mnt/test/rand-write.1.0 read 905355264 4096
/mnt/test/rand-write.1.0 write 504672256 4096
-------------
So, I make a new trace with similar format like this
-------------
fio version 2 iolog
/dev/sdb open
/dev/sdb write 4096 4096
------------
However, I failed to replay both with different error.
Firstly, I ran extracted file (fio --name test --read_iolog=trace
--replay_redirect=/dev/sdb), but error was like this,
--------------------------------------------
test: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1
fio-2.0.10
Starting 1 process
bad iolog2: fio version 2 iolog
fio: pid=14839, got signal=11
Run status group 0 (all jobs):
--------------------------------------------
and if I delete the first line than, fio said don't support iolog 1
Secondly, I ran the file I made with same command, and error was
different from former,
----------------------------------------
test: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1
fio-2.0.10
Starting 1 process
fio: pid=12868, got signal=11
Run status group 0 (all jobs):
--------------------------------------------------
I think fio was killed by someone, but I don't know why.
So,, how can I fix this problem? I tried this behavior with apt
repository fio, and current git, and fio 2.0.10 also, but error was
same.
Are you sure you tried a recent version? I just tried your trace file
with current git:
axboe@xps13:/home/axboe/git/fio $ ./fio --name=replay
--read_iolog=replay.log
replay: (g=0): rw=read, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1
fio-2.2.10-26-g3d57
Starting 1 process
[...]
Run status group 0 (all jobs):
READ: io=12KB, aggrb=222KB/s, minb=222KB/s, maxb=222KB/s,
mint=54msec, maxt=54msec
WRITE: io=4KB, aggrb=74KB/s, minb=74KB/s, maxb=74KB/s, mint=54msec,
maxt=54msec
and it's working fine. 2.0.10 is pretty old.
Assuming current -git, does it work without replay_redirect? Does it
work with that option?
--
Jens Axboe
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