[svn-r439] Changed the PHDF test programs substantially. Used to be just one

big testphdf5.c file.  Broke it into modules of related routines.
    testphdf5.c -- main routine and global variables initialization plus
		   some ulitility routines.
    t_file.c -- tests of file operations using parallel I/O.
    t_dset.c -- tests of datasets operations.

1 files changed, 51 insertions, 896 deletions

diff --git a/testpar/testphdf5.c b/testpar/testphdf5.c
index 03c3d92..1d8b632 100644
--- a/testpar/testphdf5.c
+++ b/testpar/testphdf5.c
@@ -1,84 +1,16 @@
-
 /* $Id$ */
 
 /*
- * Example of using the parallel HDF5 library to access datasets.
- *
- * This program contains two parts.  In the first part, the mpi processes
- * collectively create a new parallel HDF5 file and create two fixed
- * dimension datasets in it.  Then each process writes a hyperslab into
- * each dataset in an independent mode.  All processes collectively
- * close the datasets and the file.
- * In the second part, the processes collectively open the created file
- * and the two datasets in it.  Then each process reads a hyperslab from
- * each dataset in an independent mode and prints them out.
- * All processes collectively close the datasets and the file.
+ * Main driver of the Parallel HDF5 tests
  */
 
-#include <assert.h>
-#include <hdf5.h>
-#include <mpi.h>
-#include <mpio.h>
-
-/* Temporary source code */
-#define FAIL -1
-/* temporary code end */
-
-/* Define some handy debugging shorthands, routines, ... */
-/* debugging tools */
-
-#define MESG(x)								      \
-	if (verbose) printf("%s\n", x);					      \
-
-#define VRFY(val, mesg) do {                                                  \
-    if (val) {                                                                \
-	if (*mesg != '\0'){						      \
-	    MESG(mesg);							      \
-	}								      \
-    }								      	      \
-    else{								      \
-        printf("*** Assertion failed (%s) at line %4d in %s\n",               \
-	    mesg, (int)__LINE__, __FILE__);     			      \
-        nerrors++;                                                            \
-        H5Eprint (stdout);                                                    \
-	if (!verbose) exit(nerrors);					      \
-    }                                                                         \
-    H5Eclear();                                                               \
-} while(0)
-
-#define MPI_BANNER(mesg)\
-    {printf("--------------------------------\n");\
-    printf("Proc %d: ", mpi_rank); \
-    printf("*** %s\n", mesg);\
-    printf("--------------------------------\n");}
-
-#define SYNC(comm)\
-    {MPI_BANNER("doing a SYNC"); MPI_Barrier(comm); MPI_BANNER("SYNC DONE");}
-/* End of Define some handy debugging shorthands, routines, ... */
-
-/* Constants definitions */
-/* 24 is a multiple of 2, 3, 4, 6, 8, 12.  Neat for parallel tests. */
-#define SPACE1_DIM1	24
-#define SPACE1_DIM2	24
-#define SPACE1_RANK	2
-#define DATASETNAME1	"Data1"
-#define DATASETNAME2	"Data2"
-#define DATASETNAME3	"Data3"
-/* hyperslab layout styles */
-#define BYROW		1	/* divide into slabs of rows */
-#define BYCOL		2	/* divide into blocks of columns */
-
-
-/* dataset data type.  Int's can be easily octo dumped. */
-typedef int DATATYPE;
+#include <testphdf5.h>
 
 /* global variables */
 int nerrors = 0;				/* errors count */
-
-int mpi_size, mpi_rank;				/* mpi variables */
-
-/* option flags */
 int verbose = 0;			/* verbose, default as no. */
+
+/* other option flags */
 int doread=1;				/* read test */
 int dowrite=1;				/* write test */
 
@@ -89,8 +21,7 @@ int dowrite=1;				/* write test */
 /* continue. */
 #include <sys/types.h>
 #include <sys/stat.h>
-void pause_proc(MPI_Comm comm, int mpi_rank, char* mpi_name, int mpi_namelen,
-    int argc, char **argv)
+void pause_proc(MPI_Comm comm, int argc, char **argv)
 {
 
     int pid;
@@ -100,14 +31,22 @@ void pause_proc(MPI_Comm comm, int mpi_rank, char* mpi_name, int mpi_namelen,
     int loops = 0;
     int time_int = 10;
 
+    /* mpi variables */
+    int  mpi_size, mpi_rank;
+    int  mpi_namelen;		
+    char mpi_name[MPI_MAX_PROCESSOR_NAME];
+
 #ifdef DISABLED
     /* check if an pause interval option is given */
     if (--argc > 0 && isdigit(*++argv))
 	time_int = atoi(*argv);
 #endif
     pid = getpid();
+    MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
+    MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+    MPI_Get_processor_name(mpi_name, &mpi_namelen);
 
-    if (mpi_rank == 0)
+    if (MAINPROCESS)
 	while ((stat(greenlight, &statbuf) == -1) && loops < maxloop){
 	    if (!loops++){
 		printf("Proc %d (%*s, %d): You may attach %d for debugging.\n",
@@ -121,806 +60,6 @@ void pause_proc(MPI_Comm comm, int mpi_rank, char* mpi_name, int mpi_namelen,
 }
 #endif	/* USE_PAUSE */
 
-/*
- * Setup the dimensions of the hyperslab.
- * Two modes--by rows or by columns.
- * Assume dimension rank is 2.
- */
-void
-slab_set(hssize_t start[], hsize_t count[], hsize_t stride[], int mode)
-{
-    switch (mode){
-    case BYROW:
-	/* Each process takes a slabs of rows. */
-	stride[0] = 1;
-	stride[1] = 1;
-	count[0] = SPACE1_DIM1/mpi_size;
-	count[1] = SPACE1_DIM2;
-	start[0] = mpi_rank*count[0];
-	start[1] = 0;
-if (verbose) printf("slab_set BYROW\n");
-	break;
-    case BYCOL:
-	/* Each process takes a block of columns. */
-	stride[0] = 1;
-	stride[1] = 1;
-	count[0] = SPACE1_DIM1;
-	count[1] = SPACE1_DIM2/mpi_size;
-	start[0] = 0;
-	start[1] = mpi_rank*count[1];
-#ifdef DISABLED
-	/* change the above macro to #ifndef if you want to test */
-	/* zero elements access. */
-	printf("set to size 0\n");
-	if (!(mpi_rank % 3))
-	    count[1]=0;
-#endif
-if (verbose) printf("slab_set BYCOL\n");
-	break;
-    default:
-	/* Unknown mode.  Set it to cover the whole dataset. */
-	printf("unknown slab_set mode (%d)\n", mode);
-	stride[0] = 1;
-	stride[1] = 1;
-	count[0] = SPACE1_DIM1;
-	count[1] = SPACE1_DIM2;
-	start[0] = 0;
-	start[1] = 0;
-if (verbose) printf("slab_set wholeset\n");
-	break;
-    }
-if (verbose){
-    printf("start[]=(%d,%d), count[]=(%d,%d), total datapoints=%d\n",
-	start[0], start[1], count[0], count[1], count[0]*count[1]);
-    }
-}
-
-
-/*
- * Fill the dataset with trivial data for testing.
- * Assume dimension rank is 2 and data is stored contiguous.
- */
-void
-dataset_fill(hssize_t start[], hsize_t count[], hsize_t stride[], DATATYPE * dataset)
-{
-    DATATYPE *dataptr = dataset;
-    int i, j;
-
-    /* put some trivial data in the data_array */
-    for (i=0; i < count[0]; i++){
-	for (j=0; j < count[1]; j++){
-	    *dataptr = (i*stride[0]+start[0])*100 + (j*stride[1]+start[1]+1);
-	    dataptr++;
-	}
-    }
-}
-
-
-/*
- * Print the content of the dataset.
- */
-void dataset_print(hssize_t start[], hsize_t count[], hsize_t stride[], DATATYPE * dataset)
-{
-    DATATYPE *dataptr = dataset;
-    int i, j;
-
-    /* print the column heading */
-    printf("%-8s", "Cols:");
-    for (j=0; j < count[1]; j++){
-	printf("%3d ", start[1]+j);
-    }
-    printf("\n");
-
-    /* print the slab data */
-    for (i=0; i < count[0]; i++){
-	printf("Row %2d: ", (int)(i*stride[0]+start[0]));
-	for (j=0; j < count[1]; j++){
-	    printf("%03d ", *dataptr++);
-	}
-	printf("\n");
-    }
-}
-
-
-/*
- * Print the content of the dataset.
- */
-int dataset_vrfy(hssize_t start[], hsize_t count[], hsize_t stride[], DATATYPE *dataset, DATATYPE *original)
-{
-#define MAX_ERR_REPORT	10		/* Maximum number of errors reported */
-    DATATYPE *dataptr = dataset;
-    DATATYPE *originptr = original;
-
-    int i, j, vrfyerrs;
-
-    /* print it if verbose */
-    if (verbose)
-	dataset_print(start, count, stride, dataset);
-
-    vrfyerrs = 0;
-    for (i=0; i < count[0]; i++){
-	for (j=0; j < count[1]; j++){
-	    if (*dataset != *original){
-		if (vrfyerrs++ < MAX_ERR_REPORT){
-		    printf("Dataset Verify failed at [%d][%d](row %d, col %d): expect %d, got %d\n",
-			i, j,
-			(int)(i*stride[0]+start[0]), (int)(j*stride[1]+start[1]),
-			*(original), *(dataset));
-		}
-		dataset++;
-		original++;
-	    }
-	}
-    }
-    if (vrfyerrs > MAX_ERR_REPORT)
-	printf("[more errors ...]\n");
-    if (vrfyerrs)
-	printf("%d errors found in dataset_vrfy\n", vrfyerrs);
-    return(vrfyerrs);
-}
-
-
-/*
- * Example of using the parallel HDF5 library to create two datasets
- * in one HDF5 files with parallel MPIO access support.
- * The Datasets are of sizes (number-of-mpi-processes x DIM1) x DIM2.
- * Each process controls only a slab of size DIM1 x DIM2 within each
- * dataset.
- */
-
-void
-phdf5writeInd(char *filename)
-{
-    hid_t fid1, fid2;		/* HDF5 file IDs */
-    hid_t acc_tpl1;		/* File access templates */
-    hid_t sid1,sid2;   		/* Dataspace ID */
-    hid_t file_dataspace;	/* File dataspace ID */
-    hid_t mem_dataspace;	/* memory dataspace ID */
-    hid_t dataset1, dataset2;	/* Dataset ID */
-    int rank = SPACE1_RANK; 	/* Logical rank of dataspace */
-    hsize_t dims1[SPACE1_RANK] =
-	{SPACE1_DIM1,SPACE1_DIM2};	/* dataspace dim sizes */
-    hsize_t dimslocal1[SPACE1_RANK] =
-	{SPACE1_DIM1,SPACE1_DIM2}; 	/* local dataspace dim sizes */
-    DATATYPE data_array1[SPACE1_DIM1][SPACE1_DIM2];	/* data buffer */
-
-    hssize_t   start[SPACE1_RANK];			/* for hyperslab setting */
-    hsize_t count[SPACE1_RANK], stride[SPACE1_RANK];	/* for hyperslab setting */
-
-    herr_t ret;         	/* Generic return value */
-    int   i, j;
-    int mpi_size, mpi_rank;
-    char *fname;
-    int mrc;			/* mpi return code */
-    
-    MPI_Comm comm = MPI_COMM_WORLD;
-    MPI_Info info = MPI_INFO_NULL;
-
-    if (verbose)
-	printf("Independent write test on file %s\n", filename);
-
-    /* set up MPI parameters */
-    MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
-    MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
-
-    /* -------------------
-     * START AN HDF5 FILE 
-     * -------------------*/
-    /* setup file access template with parallel IO access. */
-    acc_tpl1 = H5Pcreate (H5P_FILE_ACCESS);
-    VRFY((acc_tpl1 != FAIL), "H5Pcreate access succeed");
-    /* set Parallel access with communicator */
-    ret = H5Pset_mpi(acc_tpl1, comm, info);     
-    VRFY((ret != FAIL), "H5Pset_mpi succeed");
-
-    /* create the file collectively */
-    fid1=H5Fcreate(filename,H5F_ACC_TRUNC,H5P_DEFAULT,acc_tpl1);
-    VRFY((fid1 != FAIL), "H5Fcreate succeed");
-
-    /* Release file-access template */
-    ret=H5Pclose(acc_tpl1);
-    VRFY((ret != FAIL), "");
-
-
-    /* --------------------------
-     * Define the dimensions of the overall datasets
-     * and the slabs local to the MPI process.
-     * ------------------------- */
-    /* setup dimensionality object */
-    sid1 = H5Screate_simple (SPACE1_RANK, dims1, NULL);
-    VRFY((sid1 != FAIL), "H5Screate_simple succeed");
-
-    
-    /* create a dataset collectively */
-    dataset1 = H5Dcreate(fid1, DATASETNAME1, H5T_NATIVE_INT, sid1,
-			H5P_DEFAULT);
-    VRFY((dataset1 != FAIL), "H5Dcreate succeed");
-
-    /* create another dataset collectively */
-    dataset2 = H5Dcreate(fid1, DATASETNAME2, H5T_NATIVE_INT, sid1,
-			H5P_DEFAULT);
-    VRFY((dataset2 != FAIL), "H5Dcreate succeed");
-
-
-
-    /* set up dimensions of the slab this process accesses */
-    slab_set(start, count, stride, BYROW);
-
-    /* put some trivial data in the data_array */
-    dataset_fill(start, count, stride, &data_array1[0][0]);
-    MESG("data_array initialized");
-
-    /* create a file dataspace independently */
-    file_dataspace = H5Dget_space (dataset1);				    
-    VRFY((file_dataspace != FAIL), "H5Dget_space succeed");
-    ret=H5Sset_hyperslab(file_dataspace, start, count, stride); 
-    VRFY((ret != FAIL), "H5Sset_hyperslab succeed");
-
-    /* create a memory dataspace independently */
-    mem_dataspace = H5Screate_simple (SPACE1_RANK, count, NULL);
-    VRFY((mem_dataspace != FAIL), "");
-
-    /* write data independently */
-    ret = H5Dwrite(dataset1, H5T_NATIVE_INT, mem_dataspace, file_dataspace,	    
-	    H5P_DEFAULT, data_array1);					    
-    VRFY((ret != FAIL), "H5Dwrite succeed");
-
-    /* write data independently */
-    ret = H5Dwrite(dataset2, H5T_NATIVE_INT, mem_dataspace, file_dataspace,	    
-	    H5P_DEFAULT, data_array1);					    
-    VRFY((ret != FAIL), "H5Dwrite succeed");
-
-    /* release dataspace ID */
-    H5Sclose(file_dataspace);
-
-    /* close dataset collectively */					    
-    ret=H5Dclose(dataset1);
-    VRFY((ret != FAIL), "H5Dclose1 succeed");
-    ret=H5Dclose(dataset2);
-    VRFY((ret != FAIL), "H5Dclose2 succeed");
-
-    /* release all IDs created */
-    H5Sclose(sid1);
-
-    /* close the file collectively */					    
-    H5Fclose(fid1);							    
-}
-
-/* Example of using the parallel HDF5 library to read a dataset */
-void
-phdf5readInd(char *filename)
-{
-    hid_t fid1, fid2;		/* HDF5 file IDs */
-    hid_t acc_tpl1;		/* File access templates */
-    hid_t sid1,sid2;   		/* Dataspace ID */
-    hid_t file_dataspace;	/* File dataspace ID */
-    hid_t mem_dataspace;	/* memory dataspace ID */
-    hid_t dataset1, dataset2;	/* Dataset ID */
-    int rank = SPACE1_RANK; 	/* Logical rank of dataspace */
-    hsize_t dims1[] = {SPACE1_DIM1,SPACE1_DIM2};   	/* dataspace dim sizes */
-    DATATYPE data_array1[SPACE1_DIM1][SPACE1_DIM2];	/* data buffer */
-    DATATYPE data_origin1[SPACE1_DIM1][SPACE1_DIM2];	/* expected data buffer */
-
-    hssize_t   start[SPACE1_RANK];			/* for hyperslab setting */
-    hsize_t count[SPACE1_RANK], stride[SPACE1_RANK];	/* for hyperslab setting */
-
-    herr_t ret;         	/* Generic return value */
-    int   i, j;
-    int mpi_size, mpi_rank;
-
-    MPI_Comm comm = MPI_COMM_WORLD;
-    MPI_Info info = MPI_INFO_NULL;
-
-    if (verbose)
-	printf("Independent read test on file %s\n", filename);
-
-    /* set up MPI parameters */
-    MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
-    MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
-
-
-    /* setup file access template */
-    acc_tpl1 = H5Pcreate (H5P_FILE_ACCESS);
-    VRFY((acc_tpl1 != FAIL), "");
-    /* set Parallel access with communicator */
-    ret = H5Pset_mpi(acc_tpl1, comm, info);     
-    VRFY((ret != FAIL), "");
-
-
-    /* open the file collectively */
-    fid1=H5Fopen(filename,H5F_ACC_RDWR,acc_tpl1);
-    VRFY((fid1 != FAIL), "");
-
-    /* Release file-access template */
-    ret=H5Pclose(acc_tpl1);
-    VRFY((ret != FAIL), "");
-
-    /* open the dataset1 collectively */
-    dataset1 = H5Dopen(fid1, DATASETNAME1);
-    VRFY((dataset1 != FAIL), "");
-
-    /* open another dataset collectively */
-    dataset2 = H5Dopen(fid1, DATASETNAME1);
-    VRFY((dataset2 != FAIL), "");
-
-
-    /* set up dimensions of the slab this process accesses */
-    slab_set(start, count, stride, BYROW);
-
-    /* create a file dataspace independently */
-    file_dataspace = H5Dget_space (dataset1);
-    VRFY((file_dataspace != FAIL), "");
-    ret=H5Sset_hyperslab(file_dataspace, start, count, stride); 
-    VRFY((ret != FAIL), "");
-
-    /* create a memory dataspace independently */
-    mem_dataspace = H5Screate_simple (SPACE1_RANK, count, NULL);
-    VRFY((mem_dataspace != FAIL), "");
-
-    /* fill dataset with test data */
-    dataset_fill(start, count, stride, &data_origin1[0][0]);
-
-    /* read data independently */
-    ret = H5Dread(dataset1, H5T_NATIVE_INT, mem_dataspace, file_dataspace,
-	    H5P_DEFAULT, data_array1);
-    VRFY((ret != FAIL), "");
-
-    /* verify the read data with original expected data */
-    ret = dataset_vrfy(start, count, stride, &data_array1[0][0], &data_origin1[0][0]);
-    if (ret) nerrors++;
-
-    /* read data independently */
-    ret = H5Dread(dataset2, H5T_NATIVE_INT, mem_dataspace, file_dataspace,
-	    H5P_DEFAULT, data_array1);
-    VRFY((ret != FAIL), "");
-
-    /* verify the read data with original expected data */
-    ret = dataset_vrfy(start, count, stride, &data_array1[0][0], &data_origin1[0][0]);
-    if (ret) nerrors++;
-
-    /* close dataset collectively */
-    ret=H5Dclose(dataset1);
-    VRFY((ret != FAIL), "");
-    ret=H5Dclose(dataset2);
-    VRFY((ret != FAIL), "");
-
-    /* release all IDs created */
-    H5Sclose(file_dataspace);
-
-    /* close the file collectively */
-    H5Fclose(fid1);
-}
-
-
-/*
- * Example of using the parallel HDF5 library to create two datasets
- * in one HDF5 file with collective parallel access support.
- * The Datasets are of sizes (number-of-mpi-processes x DIM1) x DIM2.
- * Each process controls only a slab of size DIM1 x DIM2 within each
- * dataset. [Note: not so yet.  Datasets are of sizes DIM1xDIM2 and
- * each process controls a hyperslab within.]
- */
-
-void
-phdf5writeAll(char *filename)
-{
-    hid_t fid1, fid2;		/* HDF5 file IDs */
-    hid_t acc_tpl1;		/* File access templates */
-    hid_t xfer_plist;		/* Dataset transfer properties list */
-    hid_t sid1,sid2;   		/* Dataspace ID */
-    hid_t file_dataspace;	/* File dataspace ID */
-    hid_t mem_dataspace;	/* memory dataspace ID */
-    hid_t dataset1, dataset2;	/* Dataset ID */
-    hid_t datatype;		/* Datatype ID */
-    int rank = SPACE1_RANK; 	/* Logical rank of dataspace */
-    hsize_t dims1[SPACE1_RANK] =
-	{SPACE1_DIM1,SPACE1_DIM2};	/* dataspace dim sizes */
-    DATATYPE data_array1[SPACE1_DIM1][SPACE1_DIM2];	/* data buffer */
-
-    hssize_t   start[SPACE1_RANK];			/* for hyperslab setting */
-    hsize_t count[SPACE1_RANK], stride[SPACE1_RANK];	/* for hyperslab setting */
-
-    herr_t ret;         	/* Generic return value */
-    int mpi_size, mpi_rank;
-    
-    MPI_Comm comm = MPI_COMM_WORLD;
-    MPI_Info info = MPI_INFO_NULL;
-
-    if (verbose)
-	printf("Collective write test on file %s\n", filename);
-
-    /* set up MPI parameters */
-    MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
-    MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
-
-    /* -------------------
-     * START AN HDF5 FILE 
-     * -------------------*/
-    /* setup file access template with parallel IO access. */
-    acc_tpl1 = H5Pcreate (H5P_FILE_ACCESS);
-    VRFY((acc_tpl1 != FAIL), "H5Pcreate access succeed");
-    /* set Parallel access with communicator */
-    ret = H5Pset_mpi(acc_tpl1, comm, info);     
-    VRFY((ret != FAIL), "H5Pset_mpi succeed");
-
-    /* create the file collectively */
-    fid1=H5Fcreate(filename,H5F_ACC_TRUNC,H5P_DEFAULT,acc_tpl1);
-    VRFY((fid1 != FAIL), "H5Fcreate succeed");
-
-    /* Release file-access template */
-    ret=H5Pclose(acc_tpl1);
-    VRFY((ret != FAIL), "");
-
-
-    /* --------------------------
-     * Define the dimensions of the overall datasets
-     * and create the dataset
-     * ------------------------- */
-    /* setup dimensionality object */
-    sid1 = H5Screate_simple (SPACE1_RANK, dims1, NULL);
-    VRFY((sid1 != FAIL), "H5Screate_simple succeed");
-
-    
-    /* create a dataset collectively */
-    dataset1 = H5Dcreate(fid1, DATASETNAME1, H5T_NATIVE_INT, sid1, H5P_DEFAULT);
-    VRFY((dataset1 != FAIL), "H5Dcreate succeed");
-
-    /* create another dataset collectively */
-    datatype = H5Tcopy(H5T_NATIVE_INT32);
-    ret = H5Tset_order(datatype, H5T_ORDER_LE);
-    VRFY((ret != FAIL), "H5Tset_order succeed");
-
-    dataset2 = H5Dcreate(fid1, DATASETNAME2, datatype, sid1, H5P_DEFAULT);
-    VRFY((dataset2 != FAIL), "H5Dcreate 2 succeed");
-
-    /*
-     * Set up dimensions of the slab this process accesses.
-     */
-
-    /* Dataset1: each process takes a block of rows. */
-    slab_set(start, count, stride, BYROW);
-
-    /* create a file dataspace independently */
-    file_dataspace = H5Dget_space (dataset1);				    
-    VRFY((file_dataspace != FAIL), "H5Dget_space succeed");
-    ret=H5Sset_hyperslab(file_dataspace, start, count, stride); 
-    VRFY((ret != FAIL), "H5Sset_hyperslab succeed");
-
-    /* create a memory dataspace independently */
-    mem_dataspace = H5Screate_simple (SPACE1_RANK, count, NULL);
-    VRFY((mem_dataspace != FAIL), "");
-
-    /* fill the local slab with some trivial data */
-    dataset_fill(start, count, stride, &data_array1[0][0]);
-    MESG("data_array initialized");
-    if (verbose){
-	MESG("data_array created");
-	dataset_print(start, count, stride, &data_array1[0][0]);
-    }
-
-    /* set up the collective transfer properties list */
-    xfer_plist = H5Pcreate (H5P_DATASET_XFER);
-    VRFY((xfer_plist != FAIL), "");
-    ret=H5Pset_xfer(xfer_plist, H5D_XFER_COLLECTIVE);
-    VRFY((ret != FAIL), "H5Pcreate xfer succeed");
-
-    /* write data collectively */
-    ret = H5Dwrite(dataset1, H5T_NATIVE_INT, mem_dataspace, file_dataspace,
-	    xfer_plist, data_array1);					    
-    VRFY((ret != FAIL), "H5Dwrite dataset1 succeed");
-
-    /* release all temporary handles. */
-    /* Could have used them for dataset2 but it is cleaner */
-    /* to create them again.*/
-    H5Sclose(file_dataspace);
-    H5Sclose(mem_dataspace);
-    H5Pclose(xfer_plist);
-
-    /* Dataset2: each process takes a block of columns. */
-    slab_set(start, count, stride, BYCOL);
-
-    /* put some trivial data in the data_array */
-    dataset_fill(start, count, stride, &data_array1[0][0]);
-    MESG("data_array initialized");
-    if (verbose){
-	MESG("data_array created");
-	dataset_print(start, count, stride, &data_array1[0][0]);
-    }
-
-    /* create a file dataspace independently */
-    file_dataspace = H5Dget_space (dataset1);				    
-    VRFY((file_dataspace != FAIL), "H5Dget_space succeed");
-    ret=H5Sset_hyperslab(file_dataspace, start, count, stride); 
-    VRFY((ret != FAIL), "H5Sset_hyperslab succeed");
-
-    /* create a memory dataspace independently */
-    mem_dataspace = H5Screate_simple (SPACE1_RANK, count, NULL);
-    VRFY((mem_dataspace != FAIL), "");
-
-    /* fill the local slab with some trivial data */
-    dataset_fill(start, count, stride, &data_array1[0][0]);
-    MESG("data_array initialized");
-    if (verbose){
-	MESG("data_array created");
-	dataset_print(start, count, stride, &data_array1[0][0]);
-    }
-
-    /* set up the collective transfer properties list */
-    xfer_plist = H5Pcreate (H5P_DATASET_XFER);
-    VRFY((xfer_plist != FAIL), "");
-    ret=H5Pset_xfer(xfer_plist, H5D_XFER_COLLECTIVE);
-    VRFY((ret != FAIL), "H5Pcreate xfer succeed");
-
-    /* write data independently */
-printf("WRITING TO DATASET2\n");
-    ret = H5Dwrite(dataset2, H5T_NATIVE_INT, mem_dataspace, file_dataspace,
-	    xfer_plist, data_array1);					    
-    VRFY((ret != FAIL), "H5Dwrite dataset2 succeed");
-
-    /* release all temporary handles. */
-    H5Sclose(file_dataspace);
-    H5Sclose(mem_dataspace);
-    H5Pclose(xfer_plist);
-
-
-    /*
-     * All writes completed.  Close datasets collectively
-     */					    
-    ret=H5Dclose(dataset1);
-    VRFY((ret != FAIL), "H5Dclose1 succeed");
-    ret=H5Dclose(dataset2);
-    VRFY((ret != FAIL), "H5Dclose2 succeed");
-
-    /* release all IDs created */
-    H5Sclose(sid1);
-
-    /* close the file collectively */					    
-    H5Fclose(fid1);							    
-}
-
-/*
- * Example of using the parallel HDF5 library to read two datasets
- * in one HDF5 file with collective parallel access support.
- * The Datasets are of sizes (number-of-mpi-processes x DIM1) x DIM2.
- * Each process controls only a slab of size DIM1 x DIM2 within each
- * dataset. [Note: not so yet.  Datasets are of sizes DIM1xDIM2 and
- * each process controls a hyperslab within.]
- */
-
-void
-phdf5readAll(char *filename)
-{
-    hid_t fid1, fid2;		/* HDF5 file IDs */
-    hid_t acc_tpl1;		/* File access templates */
-    hid_t xfer_plist;		/* Dataset transfer properties list */
-    hid_t sid1,sid2;   		/* Dataspace ID */
-    hid_t file_dataspace;	/* File dataspace ID */
-    hid_t mem_dataspace;	/* memory dataspace ID */
-    hid_t dataset1, dataset2;	/* Dataset ID */
-    int rank = SPACE1_RANK; 	/* Logical rank of dataspace */
-    hsize_t dims1[] = {SPACE1_DIM1,SPACE1_DIM2};   	/* dataspace dim sizes */
-    DATATYPE data_array1[SPACE1_DIM1][SPACE1_DIM2];	/* data buffer */
-    DATATYPE data_origin1[SPACE1_DIM1][SPACE1_DIM2];	/* expected data buffer */
-
-    hssize_t   start[SPACE1_RANK];			/* for hyperslab setting */
-    hsize_t count[SPACE1_RANK], stride[SPACE1_RANK];	/* for hyperslab setting */
-
-    herr_t ret;         	/* Generic return value */
-    int mpi_size, mpi_rank;
-
-    MPI_Comm comm = MPI_COMM_WORLD;
-    MPI_Info info = MPI_INFO_NULL;
-
-    if (verbose)
-	printf("Collective read test on file %s\n", filename);
-
-    /* set up MPI parameters */
-    MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
-    MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
-
-    /* -------------------
-     * OPEN AN HDF5 FILE 
-     * -------------------*/
-    /* setup file access template with parallel IO access. */
-    acc_tpl1 = H5Pcreate (H5P_FILE_ACCESS);
-    VRFY((acc_tpl1 != FAIL), "H5Pcreate access succeed");
-    /* set Parallel access with communicator */
-    ret = H5Pset_mpi(acc_tpl1, comm, info);     
-    VRFY((ret != FAIL), "H5Pset_mpi succeed");
-
-    /* open the file collectively */
-    fid1=H5Fopen(filename,H5F_ACC_RDWR,acc_tpl1);
-    VRFY((fid1 != FAIL), "H5Fopen succeed");
-
-    /* Release file-access template */
-    ret=H5Pclose(acc_tpl1);
-    VRFY((ret != FAIL), "");
-
-
-    /* --------------------------
-     * Open the datasets in it
-     * ------------------------- */
-    /* open the dataset1 collectively */
-    dataset1 = H5Dopen(fid1, DATASETNAME1);
-    VRFY((dataset1 != FAIL), "H5Dopen succeed");
-
-    /* open another dataset collectively */
-    dataset2 = H5Dopen(fid1, DATASETNAME2);
-    VRFY((dataset2 != FAIL), "H5Dopen 2 succeed");
-
-    /*
-     * Set up dimensions of the slab this process accesses.
-     */
-
-    /* Dataset1: each process takes a block of columns. */
-    slab_set(start, count, stride, BYCOL);
-
-    /* create a file dataspace independently */
-    file_dataspace = H5Dget_space (dataset1);				    
-    VRFY((file_dataspace != FAIL), "H5Dget_space succeed");
-    ret=H5Sset_hyperslab(file_dataspace, start, count, stride); 
-    VRFY((ret != FAIL), "H5Sset_hyperslab succeed");
-
-    /* create a memory dataspace independently */
-    mem_dataspace = H5Screate_simple (SPACE1_RANK, count, NULL);
-    VRFY((mem_dataspace != FAIL), "");
-
-    /* fill dataset with test data */
-    dataset_fill(start, count, stride, &data_origin1[0][0]);
-    MESG("data_array initialized");
-    if (verbose){
-	MESG("data_array created");
-	dataset_print(start, count, stride, &data_origin1[0][0]);
-    }
-
-    /* set up the collective transfer properties list */
-    xfer_plist = H5Pcreate (H5P_DATASET_XFER);
-    VRFY((xfer_plist != FAIL), "");
-    ret=H5Pset_xfer(xfer_plist, H5D_XFER_COLLECTIVE);
-    VRFY((ret != FAIL), "H5Pcreate xfer succeed");
-
-    /* read data collectively */
-    ret = H5Dread(dataset1, H5T_NATIVE_INT, mem_dataspace, file_dataspace,
-	    xfer_plist, data_array1);					    
-    VRFY((ret != FAIL), "H5Dread succeed");
-
-    /* verify the read data with original expected data */
-    ret = dataset_vrfy(start, count, stride, &data_array1[0][0], &data_origin1[0][0]);
-    if (ret) nerrors++;
-
-    /* release all temporary handles. */
-    /* Could have used them for dataset2 but it is cleaner */
-    /* to create them again.*/
-    H5Sclose(file_dataspace);
-    H5Sclose(mem_dataspace);
-    H5Pclose(xfer_plist);
-
-    /* Dataset2: each process takes a block of rows. */
-    slab_set(start, count, stride, BYROW);
-
-    /* create a file dataspace independently */
-    file_dataspace = H5Dget_space (dataset1);				    
-    VRFY((file_dataspace != FAIL), "H5Dget_space succeed");
-    ret=H5Sset_hyperslab(file_dataspace, start, count, stride); 
-    VRFY((ret != FAIL), "H5Sset_hyperslab succeed");
-
-    /* create a memory dataspace independently */
-    mem_dataspace = H5Screate_simple (SPACE1_RANK, count, NULL);
-    VRFY((mem_dataspace != FAIL), "");
-
-    /* fill dataset with test data */
-    dataset_fill(start, count, stride, &data_origin1[0][0]);
-    MESG("data_array initialized");
-    if (verbose){
-	MESG("data_array created");
-	dataset_print(start, count, stride, &data_origin1[0][0]);
-    }
-
-    /* set up the collective transfer properties list */
-    xfer_plist = H5Pcreate (H5P_DATASET_XFER);
-    VRFY((xfer_plist != FAIL), "");
-    ret=H5Pset_xfer(xfer_plist, H5D_XFER_COLLECTIVE);
-    VRFY((ret != FAIL), "H5Pcreate xfer succeed");
-
-    /* read data independently */
-    ret = H5Dread(dataset2, H5T_NATIVE_INT, mem_dataspace, file_dataspace,
-	    xfer_plist, data_array1);					    
-    VRFY((ret != FAIL), "H5Dread succeed");
-
-    /* verify the read data with original expected data */
-    ret = dataset_vrfy(start, count, stride, &data_array1[0][0], &data_origin1[0][0]);
-    if (ret) nerrors++;
-
-    /* release all temporary handles. */
-    H5Sclose(file_dataspace);
-    H5Sclose(mem_dataspace);
-    H5Pclose(xfer_plist);
-
-
-    /*
-     * All reads completed.  Close datasets collectively
-     */					    
-    ret=H5Dclose(dataset1);
-    VRFY((ret != FAIL), "H5Dclose1 succeed");
-    ret=H5Dclose(dataset2);
-    VRFY((ret != FAIL), "H5Dclose2 succeed");
-
-    /* close the file collectively */					    
-    H5Fclose(fid1);							    
-}
-
-/*
- * test file access by communicator besides COMM_WORLD.
- * Split COMM_WORLD into two, one (even_comm) contains the original
- * processes of even ranks.  The other (odd_comm) contains the original
- * processes of odd ranks.  Processes in even_comm creates a file, then
- * cloose it, using even_comm.  Processes in old_comm just do a barrier
- * using odd_comm.  Then they all do a barrier using COMM_WORLD.
- * If the file creation and cloose does not do correct collective action
- * according to the communicator argument, the processes will freeze up
- * sooner or later due to barrier mixed up.
- */
-void
-test_split_comm_access(char *filename[])
-{
-    int mpi_size, mpi_rank;
-    MPI_Comm comm;
-    MPI_Info info = MPI_INFO_NULL;
-    int color, mrc;
-    int newrank, newprocs;
-    hid_t fid;			/* file IDs */
-    hid_t acc_tpl;		/* File access properties */
-    herr_t ret;			/* generic return value */
-
-    if (verbose)
-	printf("Split Communicator access test on file %s %s\n",
-	    filename[0], filename[1]);
-
-    /* set up MPI parameters */
-    MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
-    MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
-    color = mpi_rank%2;
-    mrc = MPI_Comm_split (MPI_COMM_WORLD, color, mpi_rank, &comm);
-    VRFY((mrc==MPI_SUCCESS), "");
-    MPI_Comm_size(comm,&newprocs);
-    MPI_Comm_rank(comm,&newrank);
-
-    if (color){
-	/* odd-rank processes */
-	mrc = MPI_Barrier(comm);
-	VRFY((mrc==MPI_SUCCESS), "");
-    }else{
-	/* even-rank processes */
-	int sub_mpi_rank;	/* rank in the sub-comm */
-	MPI_Comm_rank(comm,&sub_mpi_rank);
-
-	/* setup file access template */
-	acc_tpl = H5Pcreate (H5P_FILE_ACCESS);
-	VRFY((acc_tpl != FAIL), "");
-	
-	/* set Parallel access with communicator */
-	ret = H5Pset_mpi(acc_tpl, comm, info);     
-	VRFY((ret != FAIL), "");
-
-	/* create the file collectively */
-	fid=H5Fcreate(filename[color],H5F_ACC_TRUNC,H5P_DEFAULT,acc_tpl);
-	VRFY((fid != FAIL), "H5Fcreate succeed");
-
-	/* Release file-access template */
-	ret=H5Pclose(acc_tpl);
-	VRFY((ret != FAIL), "");
-
-	/* close the file */
-	ret=H5Fclose(fid);
-	VRFY((ret != FAIL), "");
-
-	/* detele the test file */
-	if (sub_mpi_rank == 0){
-	    mrc = MPI_File_delete(filename[color], info);
-	    VRFY((mrc==MPI_SUCCESS), "");
-	}
-    }
-}
 
 /*
  * Show command usage
@@ -965,43 +104,59 @@ parse_options(int argc, char **argv){
 
 main(int argc, char **argv)
 {
-    char    *filenames[]={ "ParaEg1.h5f", "ParaEg2.h5f" };
+    char    *filenames[]={  "ParaEg1.h5f",
+			    "ParaEg2.h5f",
+			    "ParaEg3.h5f"
+			 };
 
-    int mpi_namelen;		
-    char mpi_name[MPI_MAX_PROCESSOR_NAME];
+    int mpi_size, mpi_rank;				/* mpi variables */
+
+    MPI_Init(&argc, &argv);
+    MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
+    MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+
+    if (MAINPROCESS){
+	printf("===================================\n");
+	printf("PHDF5 TESTS START\n");
+	printf("===================================\n");
+    }
 
-    MPI_Init(&argc,&argv);
-    MPI_Comm_size(MPI_COMM_WORLD,&mpi_size);
-    MPI_Comm_rank(MPI_COMM_WORLD,&mpi_rank);
-    MPI_Get_processor_name(mpi_name,&mpi_namelen);
     /* Make sure datasets can be divided into equal chunks by the processes */
-    if ((SPACE1_DIM1 % mpi_size) || (SPACE1_DIM2 % mpi_size)){
-	printf("DIM1(%d) and DIM2(%d) must be multiples of processes (%d)\n",
-	    SPACE1_DIM1, SPACE1_DIM2, mpi_size);
+    if ((DIM1 % mpi_size) || (DIM2 % mpi_size)){
+	if (MAINPROCESS)
+	    printf("DIM1(%d) and DIM2(%d) must be multiples of processes(%d)\n",
+		    DIM1, DIM2, mpi_size);
 	nerrors++;
 	goto finish;
     }
 
 #ifdef USE_PAUSE
-    pause_proc(MPI_COMM_WORLD, mpi_rank, mpi_name, mpi_namelen, argc, argv);
+    pause_proc(MPI_COMM_WORLD, argc, argv);
 #endif
 
     if (parse_options(argc, argv) != 0)
 	goto finish;
 
     if (dowrite){
-	MPI_BANNER("testing PHDF5 dataset using split communicators...");
+	MPI_BANNER("testing dataset using split communicators...");
 	test_split_comm_access(filenames);
-	MPI_BANNER("testing PHDF5 dataset independent write...");
-	phdf5writeInd(filenames[0]);
-	MPI_BANNER("testing PHDF5 dataset collective write...");
-	phdf5writeAll(filenames[1]);
+
+	MPI_BANNER("testing dataset independent write...");
+	dataset_writeInd(filenames[0]);
+
+	MPI_BANNER("testing dataset collective write...");
+	dataset_writeAll(filenames[1]);
+	MPI_BANNER("testing extendable dataset independent write...");
+	extend_writeInd(filenames[2]);
     }
     if (doread){
-	MPI_BANNER("testing PHDF5 dataset independent read...");
-	phdf5readInd(filenames[0]);
-	MPI_BANNER("testing PHDF5 dataset collective read...");
-	phdf5readAll(filenames[1]);
+	MPI_BANNER("testing dataset independent read...");
+	dataset_readInd(filenames[0]);
+
+	MPI_BANNER("testing dataset collective read...");
+	dataset_readAll(filenames[1]);
+	MPI_BANNER("testing extendable dataset independent read...");
+	extend_readInd(filenames[2]);
     }
 
     if (!(dowrite || doread)){
@@ -1010,7 +165,7 @@ main(int argc, char **argv)
     }
 
 finish:
-    if (mpi_rank == 0){		/* only process 0 reports */
+    if (MAINPROCESS){		/* only process 0 reports */
 	printf("===================================\n");
 	if (nerrors){
 	    printf("***PHDF5 tests detected %d errors***\n", nerrors);