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[netCDF #NVI-857322]: Re: [netcdfgroup] Wondering about when NetCDF data hits the disk...

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  • Subject: [netCDF #NVI-857322]: Re: [netcdfgroup] Wondering about when NetCDF data hits the disk...
  • Date: Tue, 03 Nov 2009 05:31:10 -0700
Thomas,

I should have pointed out that for a quick test you don't really need to 
download and build 
a snapshot distribution, you could just insert the fsync() call in nc.c 
according to this
context diff patch:

$ cvs diff -c -r2.152 libsrc/nc.c
Index: libsrc/nc.c
===================================================================
RCS file: /upc/share/CVS/netcdf-3/libsrc/nc.c,v
retrieving revision 2.152
retrieving revision 2.154
diff -c -r2.152 -r2.154
*** libsrc/nc.c 17 May 2009 21:18:29 -0000      2.152
--- libsrc/nc.c 2 Nov 2009 14:51:46 -0000       2.154
***************
*** 1462,1468 ****
        if(status != NC_NOERR)
                return status;
  
!       return ncp->nciop->sync(ncp->nciop);
  }
  
  
--- 1462,1477 ----
        if(status != NC_NOERR)
                return status;
  
!       status = ncp->nciop->sync(ncp->nciop);
!       if(status != NC_NOERR)
!               return status;
! 
! #ifdef USE_FSYNC
!       /* experimental, to see if it improves NFS concurrent access */
!       status = fsync(ncp->nciop->fd);
! #endif        /* USE_FSYN */
! 
!       return status;
  }

--Russ



Russ Rew                                         UCAR Unidata Program
address@hidden                     http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: NVI-857322
Department: Support netCDF
Priority: Normal
Status: Closed