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4636584d5b
re: https://github.com/Unidata/netcdf-c/issues/1154 Inadvertently, the behavior of NC_DISKLESS with nc_create() was changed in release 4.6.1. Previously, the NC_WRITE flag needed to be explicitly used with NC_DISKLESS in order to cause the created file to be persisted to disk. Additional analyis indicated that the current NC_DISKLESS implementation was seriously flawed. This PR attempts to clean up and regularize the situation with respect to NC_DISKLESS control. One important aspect of diskless operation is that there are two different notions of write. 1. The file is read-write vs read-only when using the netcdf API. 2. The file is persisted or not to disk at nc_close(). Previously, these two were conflated. The rules now are as follows. 1. NC_DISKLESS + NC_WRITE means that the file is read/write using the netcdf API 2. NC_DISKLESS + NC_PERSIST means that the file is persisted to a disk file at nc_close. 3. NC_DISKLESS + NC_PERSIST + NC_WRITE means both 1 and 2. The NC_PERSIST flag is new and takes over the obsolete NC_MPIPOSIX flag. NC_MPIPOSIX is still defined, but is now an alias for the NC_MPIIO flag. It is also now the case that for netcdf-4, NC_DISKLESS is independent of NC_INMEMORY and in fact it is an error to specify both flags simultaneously. Finally, the MMAP code was fixed to use NC_PERSIST as well. Also marked MMAP as deprecated. Also added a test case to test various combinations of NC_DISKLESS, NC_PERSIST, and NC_WRITE. This PR affects a number of files and especially test cases that used NC_DISKLESS. Misc. Unrelated fixes 1. fixed some warnings in ncdump/dumplib.c
59 lines
1.2 KiB
Bash
Executable File
59 lines
1.2 KiB
Bash
Executable File
#!/bin/sh
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if test "x$srcdir" = x ; then srcdir=`pwd`; fi
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. ../test_common.sh
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set -e
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# Get the target OS and CPU
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CPU=`uname -p`
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OS=`uname`
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#Constants
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FILE1=tst_diskless.nc
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FILE2=tst_diskless2.nc
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FILE3=tst_diskless3.nc
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echo ""
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echo "*** Testing create files with mmap"
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echo "**** Test create mmap netCDF classic file without persistence"
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${execdir}/tst_diskless mmap
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echo "PASS: create mmap netCDF classic file without persistence"
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echo ""
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echo "**** Test create mmap netCDF classic file with persistence"
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rm -f $FILE1
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${execdir}/tst_diskless mmap persist
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if test -f $FILE1 ; then
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echo "**** $FILE1 created"
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# ${NCDUMP} $FILE1
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echo "PASS: create mmap netCDF classic file with persistence"
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else
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echo "#### $FILE1 not created"
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echo "FAIL: create mmap netCDF classic file with persistence"
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fi
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rm -f tmp1.cdl tmp2.cdl tmp1.nc tmp2.nc
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echo ""
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echo "**** Testing open files with mmap"
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# clear old files
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rm -f tst_diskless3_file.cdl tst_diskless3_memory.cdl
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echo ""
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echo "**** Open and modify file using mmap"
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rm -f $FILE3
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${execdir}/tst_diskless3 diskless mmap
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${NCDUMP} $FILE3 >tst_diskless3_memory.cdl
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# compare
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diff tst_diskless3_file.cdl tst_diskless3_memory.cdl
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# cleanup
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rm -f $FILE3 tst_diskless3_file.cdl tst_diskless3_memory.cdl
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exit
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