[PVFS-users] Questions on changing striping parameters with pvfs_stat

[Phil Carns]

> Greetings,
> 
> I've just started using PVFS.  I have an I/O bench program where I would
> like to set the striping parameters (via the pvfs_stat structure) to different
> values than the default.  According to the documentation, I need to use
> pvfs_open to specify these striping parameters.
> 
> My questions are:
> 
>   1) I have downloaded the source.  I notice that both the utility programs
>      and example programs link to a library called libminipvfs.a.  If I
>      want to do static linking, is this the library I need to use?  (libpvfs.a 
>      does not contain the pvfs calls, and libminipvfs.a was not installed in 
>      /usr/lib when I performed the install, which is why I am asking.)

Yes- this is the best library to use if you are going to use the pvfs_xxx
interface.  It does not contain anything except those functions.  (As a
side note, they should be available in the libpvfs.a as well, but I would
recommend just using the mini for this setup).  

>   2) Once I use ppfs_open, do I need to use the ppfs_* library calls for
>      the other I/O functions (for example, read/write), and can I just
>      use the Unix I/O functions?

You should use all of one or the other- either all pvfs_xxx calls or all
Unix I/O functions.

Good luck.  And of course if you come up with any interesting results we
are always happy to hear about them :)

-Phil