[Pvfs2-users] How to use pvfs2_open_

[Rob Latham]

On Sat, May 30, 2009 at 12:04:30PM -0500, Ariel Briceño wrote:
> in each machine (both machines are IO servers),
> when i try to use pvfs2_open in my code like this:

Hi Ariel

I see over on the irc channel that you do not want to use MPI.  I just
wanted to point out that you could use the MPI_FILE routines even if
your application is serial.   

> Another issue is, although i copied
> /usr/src/pvfs-2.8.1/examples/pvfs2-server.rc
> to /etc/rc.d/init.d/pvfs2-server i can't do /etc/rc.d/init.d/pvfs2-server
> start or
> /etc/rc.d/init.d/pvfs2-server stop. Why is this?

I think pvfs2-server.rc might only work out-of-the-box on redhat-like
systems?  I'm not sure: it probably requires some site-specific
modifications.  You might be better off starting and stopping by hand
if you aren't familiar with your distributions init scripts.

> In the machine that i want to mount the pvfs2 volume i did
> 
> cd /usr/src/pvfs-2.8.1/src/apps/kernel/linux/
> ./pvfs2-client -f -p ./pvfs2-client-core
> 
> and the result was
> 
> pvfs2-client starting
> Spawning new child process
> Waiting on child with pid 5544
> About to exec: ./pvfs2-client-core, with args: pvfs2-client-core --child -a
> 5 -n 5 --logtype file -L /tmp/pvfs2-client.log
> 
> but nothing more happened. Whatn is wrong?

Looks like it's behaving exactly as it should: you passed the -f flag,
which keeps it in the foreground.  

You should be able to, in another terminal, mount PVFS now.

==rob

-- 
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA