Unaligned AIO/DIO

[Troels Arvin <troels@xxxxxxxx>]

Hello,

Running fio 1.55 on RHEL 6.1 x86_64 with a multipath FC storage backend 
on an EXT4 file system.

Some minutes after starting fio, I see the following in syslog:
kernel: EXT4-fs (dm-28): Unaligned AIO/DIO on inode 4063238 by fio; 
performance will be poor.

Should I be worried? Is there something wrong with my storage layout?
Or am I using fio in strange way?

My job file:

[changed-from-iometer-file-access-server]
bssplit=512/10:1k/5:2k/5:4k/60:8k/2:16k/4:32k/4:64k/10
rw=randrw
rwmixread=70
direct=1
size=10g
ioengine=libaio
iodepth=256
write_bw_log
write_lat_log
numjobs=6

--
Regards,
Troels Arvin <troels@xxxxxxxx>
http://troels.arvin.dk/
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