Re: Urgent problem while using Fio to test random write performance

[David Nellans <david@nellans.org>]

you're randwrite to a raw partition. if you had a filesystem on that 
partition you were trying to use, then well, your data is gone/corrupted.
without a filesystem on it, i'm not sure how you'd think that your disc 
usage has become "100%" without some xgui widgit warning you, so seems 
likely you did something you didn't mean to with regards to writing to 
/dev/sdb1 directly

if you use fio on devices/partitions with a filesystem, you need to have 
it write to files or it will trash your filesystem



On 05/21/2015 03:17 AM, Nan WANG wrote:
> hi all~
>     I wanted to use fio to test random write performance, the command 
> line is as forllowing:
>
>       fio --filename=/dev/sdb1 --direct=1 --iodepth 1 --thread 
> --rw=randwrite --ioengine=psync --bs=16k --size=200G --numjobs=10 
> --runtime=1000 --group_reporting --name=mytest
>
>     After the execution of fio finished, my disc usage become 100%, is 
> there any method to release the content written by Fio?
>
>  Thanks a lot in advance!!
>