Alfred,
It looks like a bug with iozone. I tried it on ext3:
[root@client01 test]# /opt/benchmarks/iozone-3.315/bin/iozone -s 3k
-i 0 -i 1 -f test1
Iozone: Performance Test of File I/O
Version $Revision: 3.315 $
Compiled for 64 bit mode.
Build: linux-AMD64
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root.
Run began: Fri Jan 2 04:47:58 2009
File size set to 3 KB
Command line used: /opt/benchmarks/iozone-3.315/bin/iozone -s
3k -i 0 -i 1 -f test1
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random
random bkwd record stride
KB reclen write rewrite read reread read
write read rewrite read fwrite frewrite fread freread
3 4 0 0
Error reading block 0 d9d00000
read: Bad file descriptor
[root@client01 test]#
It gives error for -s <= 3k
strace output shows that iozone is calling close() twice on the same fd:
close(3) = 0
close(3) = -1 EBADF (Bad file descriptor)
The second close getting EBADF
Krishna
On Fri, Jan 2, 2009 at 8:47 AM, yaomin @ gmail <yangyaomin@xxxxxxxxx> wrote:
> Hey, Guys
>
> When I use IOZone to test my gluster configuration, an error happens if
> the file's size is smaller or equal to 1KB.
>
>
> Thanks,
> Alfred Yang.
>
>
>
>
> Below is the message:
>
> /opt/iozone/bin/iozone -f /mnt/new/test1 -s 1k -i 0 -i 1
> Iozone: Performance Test of File I/O
> Version $Revision: 3.315 $
> Compiled for 32 bit mode.
> Build: linux
>
> Contributors:William Norcott, Don Capps, Isom Crawford, Kirby
> Collins
> Al Slater, Scott Rhine, Mike Wisner, Ken Goss
> Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
> Randy Dunlap, Mark Montague, Dan Million, Gavin
> Brebner,
> Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy,
> Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root.
>
> Run began: Fri Jan 2 11:00:14 2009
>
> File size set to 1 KB
> Command line used: /opt/iozone/bin/iozone -f /mnt/new/test1 -s 1k -i
> 0 -i 1
> Output is in Kbytes/sec
> Time Resolution = 0.000001 seconds.
> Processor cache size set to 1024 Kbytes.
> Processor cache line size set to 32 bytes.
> File stride size set to 17 * record size.
> random
> random bkwd record stride
> KB reclen write rewrite read reread read
> write read rewrite read fwrite frewrite fread freread
> 1 4 0 0
> Error reading block 0 f6e00000
> read: Bad file descriptor
>
>
