S:
I want to get benchmark from pNFS+ fscache with iozone
But iozone can't work well
/proc/fs/nfsfs/volumes show that the fsc is YES
I have open cachefiled and mount a ssd (ext3/user_xattr) on /var/fscache
When I use iozone to test read/re-read it can't write page to the SSD DISK
/var/log/messages show that first it can write 4 pages successfully
after NFS: nfs_getpages_from_fscache: no page: -105
Then it won't write any page to fscache
If i use( cp /mnt/file ./ ) The fscache works well
I confuse and have google many web page. change source code to latest
one But can't handle it.
I wish any help
Thanks
yours
GongMeng
> S:
>
> I want to get benchmark from pNFS+ fscache with iozone
>
> But iozone can't work well
> /proc/fs/nfsfs/volumes show that the fsc is YES
>
> I have open cachefiled and mount a ssd (ext3/user_xattr) on /var/fscache
>
> When I use iozone to test read/re-read it can't write page to the SSD DISK
>
> /var/log/messages show that first it can write 4 pages successfully
>
> after NFS: nfs_getpages_from_fscache: no page: -105
Please confirm whether do you have enough memory when get this error,
i guess iozone eats lot of memory.
And, maybe the information of /proc/fs/fscache/states is useful, please
puts it.
--
Regards
Bian Naimeng
Thank you
I have checked the memory ( 12G.) and sometimes memory is only 512M
(I set it in grub.conf)
fscache works well I have sent /proc/fs/fscache/states to David
(RedHat who write fscache)
ENOBUFS is just normal infor
But once fscache detect a ENOBUFS It can't alloc more buff Then
no more data can be write to disk
nfs_readpages_to_fscache __nfs_readpages_from_fscache may report ENOBUF
After that no buff will be alloc
Thank you for replaying this mail
yours
GongMeng
On Wed, Sep 15, 2010 at 5:28 PM, Bian Naimeng <[email protected]> wrote:
>> S:
>>
>> I want to get benchmark from pNFS+ fscache with iozone
>>
>> But ?iozone can't work well
>> /proc/fs/nfsfs/volumes ? show that ?the fsc is YES
>>
>> I have open cachefiled and mount a ssd (ext3/user_xattr) on /var/fscache
>>
>> When I use iozone to test read/re-read ? it can't write page to the SSD DISK
>>
>> /var/log/messages ?show that ?first it can write 4 pages successfully
>>
>> after NFS: nfs_getpages_from_fscache: no page: -105
>
> ?Please confirm whether do you have enough memory when get this error,
> ?i guess iozone eats lot of memory.
>
> ?And, maybe the information of /proc/fs/fscache/states is useful, please
> ?puts it.
>
> --
> Regards
> Bian Naimeng
>
>