Here is what I had been planning on sending:
Is there a means in the MPI-IO proposal for caching information in/with
a file handle? I was pondering how I would write using MPI-IO a library
we are considering writing. One thought that came to mind was that
storing information associated with particular files would be easier if there
were a facility similar to MPI_Attr_put/get but for files. I was
pondering proposing such, when the thought of using MPI-IO hints came to
mind. However, I am uncertain this would work. Also, with
the proposed redefinition of from hints to an info structure, I was wondering
whether my idea would work with the change.
Basically my idea for caching information using hints is:
1. My library would use a hint name that does not start with MPI_ to
attempt to avoid conflicts.
2. The user would attach the hint using MPI_Open, MPI_Fcntl as with
a hint to MPI-IO
3. In my library I would retrieve the hints using MPI_Fcntl.
Would this work based on the proposed standard and could I do something
similar using the info structure?
John Wilson