h3. PIO current supports the following configuration:

 {color:green}Additions from 1/24/07 telecon{color}
# -
- Parallel Disk I/O for:
# -binary files using MPI-IO
# -netCDF files using pNetCDF
- Data rearrangement via MCT
h3. Ongoing Work:

# -
- Rearrangement of directory structure and improvement of build procedure.  \[{color:red}Loy{color}\]
- Evaluate extensibility of PIO interface \[{color:red}Vertenstein, Craig, Eaton, Worley{color}\] 
- Debugging of the MCT + {binary files,pNetCDF} files.  This problem only appears to occur for a small number of IO processes on BGL (<32)  \[{color:red}Loy, Dennis{color}\]
- Debugging of {binary, pNetCDF} files.  This problem only appears to occur for a small number of IO processes on BGL (<32) \[{color:red}Dennis{color}\]
- Refining of prototype implementation of PIO in POP. \[{color:red}Dennis{color}\]
 
# - Writing of 'holes' in the output file.
# - Support for record numbers.

h3. Additional Work:
# -
-  {color:green}Add support for sequential binary IO {color}
- Improve support for 1D and 3D arrays in PIO.  Create a test code that exercises 1D and 3D array writes. 
- Improve parallel performance.  Possibly through the use of MPI-IO hints, or careful use of MCT and layouts.  
- More extensive testing is need.  Currently it has only been lightly tested on BGL and AIX5.
- Support for use of serial netCDF calls.  Use MCT rearranger to redistribute data to a single processor.  Disk I/O is subsequently performed by calling the serial netCDF interface. \[{color:green}Loy{color}\]
- Support for use of serial binary calls.  Use MCT rearranger to redistribute data to a single processor.  Disk I/O is subsequently performed by calling a FORTRAN read or write.\[{color:green}Loy{color}\]
- Support for calling of PIO from non-MPI environment.  
- Need to simplify the interface to PIO_initDecomp.  This could probably be done by using a single global segmap or GDOF approach. Code within PIO_initDecomp could subsequently translate decomposition information for use by MPI data structures or pNetCDF.
- General restructuring of the PIO internals.  Need to modify code such that it can be easily compiled without pNetCDF, or without MPI-IO, etc...