[Pvfs2-developers] Changing the number of I/O servers

[Christina Patrick]

Hi Rob,

I am willing to try it out. However, I don't know how to do so using pvfs2-cp.
Sorry to trouble you, but could you please tell me how to do it.

Thanks and Regards,
Christina.

On Wed, Jul 15, 2009 at 1:55 PM, Rob Latham<robl at mcs.anl.gov> wrote:
> On Wed, Jul 15, 2009 at 12:15:58PM -0400, Christina Patrick wrote:
>> Hi Rob,
>>
>> I checked PVFS_sys_create and got the following:
>>
>> attr.dfile_count = 1
>>
>> attr = {owner = 13950, group = 105, perms = 420, __padperms = 0,
>>         atime = 1247673018, mtime = 1247673018, ctime = 1247673018, size = 0,
>>         link_target = 0x0, __padlink_target = 0, dfile_count = 1,
>>         __paddfile_count = 0, dist_name = 0x0, __paddist_name = 0,
>>         dist_params = 0x0, __paddist_params = 0, dirent_count = 0,
>>         objtype = PVFS_TYPE_NONE, flags = 0, mask = 33554495, blksize = 0}
>>
>> However, the file is still striped across three I/O servers.
>
> That suggests ROMIO is doing the right things and we've got something
> going on with the system interface.
>
> Can you play around with options to pvfs2-cp and see if you can create
> files striped across 1, several, and all servers?
>
> ==rob
>
> --
> Rob Latham
> Mathematics and Computer Science Division
> Argonne National Lab, IL USA
>