Changeset 1485 for XIOS/dev/XIOS_DEV_CMIP6/src/io/inetcdf4.cpp

Timestamp:

04/17/18 11:55:51 (6 years ago)

Author:

oabramkina

Message:

Enforcing sequential I/O on the client side during reading of metadata by client processes. Parallel I/O can still be used in this case via setting file attribute "read_metadata_par" to true.

File:

• XIOS/dev/XIOS_DEV_CMIP6/src/io/inetcdf4.cpp (modified) (2 diffs)

XIOS/dev/XIOS_DEV_CMIP6/src/io/inetcdf4.cpp

@@ -7 +7 @@
 namespace xios
 {
-  CINetCDF4::CINetCDF4(const StdString& filename, const MPI_Comm* comm /*= NULL*/, bool multifile /*= true*/, const StdString& timeCounterName /*= "time_counter"*/)
+  CINetCDF4::CINetCDF4(const StdString& filename, const MPI_Comm* comm /*= NULL*/, bool multifile /*= true*/,
+                       bool readMetaDataPar /*= false*/, const StdString& timeCounterName /*= "time_counter"*/)
   {
     // Don't use parallel mode if there is only one process
@@ -17 +18 @@
         comm = NULL;
     }
-    mpi = comm && !multifile;
+    mpi = comm && !multifile && readMetaDataPar;
 
     // The file format will be detected automatically by NetCDF, it is safe to always set NC_MPIIO