filename prefixes

[Gerald Creager]

It's a namelist.input spec: NOCOLONS

I'm sorting thru some other issues with pnetcdf and WRF right now... I'm 
having to change it so it'll create wrfout_dxx files with the striping 
info correct at file creation. If anyone's had to do this, I'd 
appreciate a clue...

gerry

Jim Edwards wrote:
> Hi Johnny,
> 
> I think that the real problem may be that WRF uses the colon character 
> in filenames and the filesystem reserves this same character for special 
> use.   I think that there is a compile option for wrf not to use colons.
> 
> Jim
> 
> On Wed, Aug 11, 2010 at 4:44 PM, Johnny Chang <Johnny.Chang at nasa.gov 
> <mailto:Johnny.Chang at nasa.gov>> wrote:
> 
>     Hello,
> 
>     I am helping a user trouble-shoot a runtime error using
>     parallel-netcdf version 1.1.1 and mvapich2/1.2p1/intel-PIC.
> 
>     The error message is:
> 
>      0: MPI_File_open : File does not exist, error stack:
>     ADIO_RESOLVEFILETYPE_PREFIX(546): Invalid file name
>     wrfout_d01_2006-07-25_00:00:00
>      open_hist_w : error opening wrfout_d01_2006-07-25_00:00:00 for
>     writing. ***
> 
>     While googling the ADIO_RESOLVEFILETYPE_PREFIX error, we found the
>     ad_fstype.c code containing:
> 
>     477     /*
>     478       ADIO_FileSysType_prefix - determines file system type for
>     a file using
>     479       a prefix on the file name.  upper layer should have
>     already determined
>     480       that a prefix is present.
>     481    
>     482     Input Parameters:
>     483     . filename - path to file, including prefix (xxx:)
>     484    
>     485     Output Parameters:
>     486     . fstype - pointer to integer in which to store file system
>     type (ADIO_XXX)
>     487     . error_code - pointer to integer in which to store error code
>     488    
>     489       Returns MPI_SUCCESS in error_code on success.  Filename
>     not having a prefix
>     490       is considered an error. Except for on Windows systems
>     where the default is NTFS.
>     491    
>     492      */
>     493     static void ADIO_FileSysType_prefix(char *filename, int
>     *fstype, int *error_code)
>     494     {
>     495         static char myname[] = "ADIO_RESOLVEFILETYPE_PREFIX";
>     496         *error_code = MPI_SUCCESS;
>     497    
>     498         if (!strncmp(filename, "pfs:", 4) || !strncmp(filename,
>     "PFS:", 4)) {
>     499             *fstype = ADIO_PFS;
>     500         }
> 
>             ...
> 
> 
>     557     #else
>     558             *fstype = 0;
>     559             /* --BEGIN ERROR HANDLING-- */
>     560             *error_code = MPIO_Err_create_code(MPI_SUCCESS,
>     MPIR_ERR_RECOVERABLE,
>     561                                                myname, __LINE__,
>     MPI_ERR_NO_SUCH_FILE,
>     562                                                "**filename",
>     "**filename %s", filename);
>     563             /* --END ERROR HANDLING-- */
>     564     #endif
>     565         }
>     566     }
> 
>     which seems to indicate that the MVAPICH2 library is expecting
>     parallel-netcdf
>     to pre-pend a prefix on the filename passed to the MVAPICH2 library.
> 
>     We are running on a Lustre filesystem.  So, we think that the
>     parallel-netcdf
>     library should have passed the "lustre:" or "LUSTRE:" prefix along
>     with the
>     actual filename.  Are we right in this interpretation of the error?
> 
>     If so, then perhaps the parallel-netcdf library was not built correctly?
> 
>     Here is the beginning part of config.log:
> 
>     ------------------------------------------------------------------------
> 
>     This file contains any messages produced by compilers while
>     running configure, to aid debugging if configure makes a mistake.
> 
>     It was created by configure, which was
>     generated by GNU Autoconf 2.61.  Invocation command line was
> 
>      $ ./configure --prefix=/nasa/parallel-netcdf/1.1.1/mvapich2
>     --with-mpi=/nasa/mvapich2/1.2p1/intel-PIC
> 
>     ## --------- ##
>     ## Platform. ##
>     ## --------- ##
> 
>     hostname = pbspl1
>     uname -m = x86_64
>     uname -r = 2.6.16.60-0.42.5.03schamp-nasa
>     uname -s = Linux
>     uname -v = #1 SMP Tue Nov 10 20:46:20 UTC 2009
> 
>     /usr/bin/uname -p = unknown
>     /bin/uname -X     = unknown
> 
>     /bin/arch              = x86_64
>     /usr/bin/arch -k       = unknown
>     /usr/convex/getsysinfo = unknown
>     /usr/bin/hostinfo      = unknown
>     /bin/machine           = unknown
>     /usr/bin/oslevel       = unknown
>     /bin/universe          = unknown
> 
>     PATH: /nasa/intel/Compiler/11.1/046/bin/intel64
>     PATH: /nasa/intel/Compiler/11.1/046/mkl/tools/environment
>     PATH: /nasa/mvapich2/1.2p1/intel-PIC/bin
>     PATH: /u/jrappley/bin
> 
>     If the problem is in the parallel-netcdf build, let us know
>     what is the fix.
> 
>     Thanks in advance!
> 
>     Johnny
>     -- 
>     Johnny Chang
>     650-604-4356
> 
> 

-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843