[svn-r9359] Purpose:

    Bug fix

Description:
    Relax restrictions on parallel I/O to allow compressed, chunked datasets
to be read in parallel (collective access will be degraded to independent
access, but will retrieve the information still).

Platforms tested:
    FreeBSD 4.10 (sleipnir) w/parallel
    Solaris 2.7 (arabica)
    IRIX64 6.5 (modi4)
    h5committest

7 files changed, 487 insertions, 37 deletions

diff --git a/testpar/t_coll_chunk.c b/testpar/t_coll_chunk.c
index 680940f..c7d4bef 100644
--- a/testpar/t_coll_chunk.c
+++ b/testpar/t_coll_chunk.c
@@ -93,7 +93,7 @@ coll_chunk4(void)
   char *filename;
   int mpi_size;
   MPI_Comm comm = MPI_COMM_WORLD;
-   MPI_Comm_size(comm,&mpi_size); 
+  MPI_Comm_size(comm,&mpi_size);           
   filename = (char *) GetTestParameters();
   coll_chunktest(filename,mpi_size*2,BYROW_DISCONT);
 
@@ -339,17 +339,8 @@ ccslab_set(int mpi_rank, int mpi_size, hssize_t start[], hsize_t count[],
 	break;
     case BYROW_DISCONT:
 	/* Each process takes several disjoint blocks. */
-        /*
-	block[0] = 2;
-	block[1] = 2;
-	stride[0] = 3;
-	stride[1] = 6;
-	count[0] = 2;
-	count[1] = 3;
-        */
-        
-        block[0] = 1;
-        block[1] = 1;
+	block[0] = 1;
+	block[1] = 1;
         stride[0] = 3;
         stride[1] = 3;
         count[0]  = (SPACE_DIM1/mpi_size)/(stride[0]*block[0]);
diff --git a/testpar/t_dset.c b/testpar/t_dset.c
index baa1b51..b45fdb3 100644
--- a/testpar/t_dset.c
+++ b/testpar/t_dset.c
@@ -232,7 +232,7 @@ dataset_writeInd(void)
     hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
     hsize_t dims[RANK];   	/* dataset dim sizes */
     DATATYPE *data_array1 = NULL;	/* data buffer */
-    char *filename;
+    const char *filename;
 
     hssize_t   start[RANK];			/* for hyperslab setting */
     hsize_t count[RANK], stride[RANK];		/* for hyperslab setting */
@@ -244,7 +244,7 @@ dataset_writeInd(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Independent write test on file %s\n", filename);
 
@@ -378,7 +378,7 @@ dataset_readInd(void)
     hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
     DATATYPE *data_array1 = NULL;	/* data buffer */
     DATATYPE *data_origin1 = NULL; 	/* expected data buffer */
-    char *filename;
+    const char *filename;
 
     hssize_t   start[RANK];			/* for hyperslab setting */
     hsize_t count[RANK], stride[RANK];		/* for hyperslab setting */
@@ -390,7 +390,7 @@ dataset_readInd(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Independent read test on file %s\n", filename);
 
@@ -504,7 +504,7 @@ dataset_writeAll(void)
     hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
     hsize_t dims[RANK];   	/* dataset dim sizes */
     DATATYPE *data_array1 = NULL;	/* data buffer */
-    char *filename;
+    const char *filename;
 
     hssize_t   start[RANK];			/* for hyperslab setting */
     hsize_t count[RANK], stride[RANK];		/* for hyperslab setting */
@@ -516,7 +516,7 @@ dataset_writeAll(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Collective write test on file %s\n", filename);
 
@@ -863,7 +863,7 @@ dataset_readAll(void)
     hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
     DATATYPE *data_array1 = NULL;	/* data buffer */
     DATATYPE *data_origin1 = NULL; 	/* expected data buffer */
-    char *filename;
+    const char *filename;
 
     hssize_t   start[RANK];			/* for hyperslab setting */
     hsize_t count[RANK], stride[RANK];		/* for hyperslab setting */
@@ -875,7 +875,7 @@ dataset_readAll(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Collective read test on file %s\n", filename);
 
@@ -1084,7 +1084,7 @@ extend_writeInd(void)
     hid_t mem_dataspace;	/* memory dataspace ID */
     hid_t dataset1, dataset2;	/* Dataset ID */
     hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
-    char *filename;
+    const char *filename;
     hsize_t dims[RANK];   	/* dataset dim sizes */
     hsize_t max_dims[RANK] =
 		{H5S_UNLIMITED, H5S_UNLIMITED};	/* dataset maximum dim sizes */
@@ -1103,7 +1103,7 @@ extend_writeInd(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Extend independent write test on file %s\n", filename);
 
@@ -1312,7 +1312,7 @@ extend_writeInd(void)
 void
 extend_writeInd2(void)
 {
-    char *filename;
+    const char *filename;
     hid_t fid;                  /* HDF5 file ID */
     hid_t fapl;			/* File access templates */
     hid_t fs;   		/* File dataspace ID */
@@ -1331,7 +1331,7 @@ extend_writeInd2(void)
     int i;                      /* Local index variable */
     herr_t ret;         	/* Generic return value */
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Extend independent write test #2 on file %s\n", filename);
 
@@ -1485,7 +1485,7 @@ extend_readInd(void)
     DATATYPE *data_array1 = NULL;	/* data buffer */
     DATATYPE *data_array2 = NULL;	/* data buffer */
     DATATYPE *data_origin1 = NULL; 	/* expected data buffer */
-    char *filename;
+    const char *filename;
 
     hssize_t   start[RANK];			/* for hyperslab setting */
     hsize_t count[RANK], stride[RANK];		/* for hyperslab setting */
@@ -1497,7 +1497,7 @@ extend_readInd(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Extend independent read test on file %s\n", filename);
 
@@ -1662,7 +1662,7 @@ extend_writeAll(void)
     hid_t mem_dataspace;	/* memory dataspace ID */
     hid_t dataset1, dataset2;	/* Dataset ID */
     hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
-    char *filename;
+    const char *filename;
     hsize_t dims[RANK];   	/* dataset dim sizes */
     hsize_t max_dims[RANK] =
 		{H5S_UNLIMITED, H5S_UNLIMITED};	/* dataset maximum dim sizes */
@@ -1681,7 +1681,7 @@ extend_writeAll(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Extend independent write test on file %s\n", filename);
 
@@ -1907,7 +1907,7 @@ extend_readAll(void)
     hid_t mem_dataspace;	/* memory dataspace ID */
     hid_t dataset1, dataset2;	/* Dataset ID */
     hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
-    char *filename;
+    const char *filename;
     hsize_t dims[RANK];   	/* dataset dim sizes */
     DATATYPE *data_array1 = NULL;	/* data buffer */
     DATATYPE *data_array2 = NULL;	/* data buffer */
@@ -1923,7 +1923,7 @@ extend_readAll(void)
     MPI_Comm comm = MPI_COMM_WORLD;
     MPI_Info info = MPI_INFO_NULL;
 
-    filename = (char *) GetTestParameters();
+    filename = GetTestParameters();
     if (VERBOSE_MED)
 	printf("Extend independent read test on file %s\n", filename);
 
@@ -2078,3 +2078,161 @@ extend_readAll(void)
     if (data_array2) free(data_array2);
     if (data_origin1) free(data_origin1);
 }
+
+/*
+ * Example of using the parallel HDF5 library to read a compressed
+ * dataset in an HDF5 file with collective parallel access support.
+ */
+
+#ifdef H5_HAVE_FILTER_DEFLATE
+void
+compress_readAll(void)
+{
+    hid_t fid;                  /* HDF5 file ID */
+    hid_t acc_tpl;		/* File access templates */
+    hid_t dcpl;                 /* Dataset creation property list */
+    hid_t xfer_plist;		/* Dataset transfer properties list */
+    hid_t dataspace;		/* Dataspace ID */
+    hid_t dataset;		/* Dataset ID */
+    int rank=1;                 /* Dataspace rank */
+    hsize_t dim=dim0;           /* Dataspace dimensions */
+    unsigned u;                 /* Local index variable */
+    hbool_t use_gpfs = FALSE;   /* Use GPFS hints */
+    DATATYPE *data_read = NULL;	/* data buffer */
+    DATATYPE *data_orig = NULL; /* expected data buffer */
+    const char *filename;
+    MPI_Comm comm = MPI_COMM_WORLD;
+    MPI_Info info = MPI_INFO_NULL;
+    int mpi_size, mpi_rank;
+    herr_t ret;         	/* Generic return value */
+
+    filename = GetTestParameters();
+    if (VERBOSE_MED)
+	printf("Collective chunked dataset read test on file %s\n", filename);
+
+    /* Retrieve MPI parameters */
+    MPI_Comm_size(comm,&mpi_size);
+    MPI_Comm_rank(comm,&mpi_rank);
+
+    /* Allocate data buffer */
+    data_orig = (DATATYPE *)HDmalloc((size_t)dim*sizeof(DATATYPE));
+    VRFY((data_orig != NULL), "data_origin1 malloc succeeded");
+    data_read = (DATATYPE *)HDmalloc((size_t)dim*sizeof(DATATYPE));
+    VRFY((data_read != NULL), "data_array1 malloc succeeded");
+
+    /* Initialize data buffers */
+    for(u=0; u<dim;u++)
+        data_orig[u]=u;
+
+    /* Process zero creates the file with a compressed, chunked dataset */
+    if(mpi_rank==0) {
+        hsize_t chunk_dim;           /* Chunk dimensions */
+
+        /* Create the file */
+        fid = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+        VRFY((fid > 0), "H5Fcreate succeeded");
+
+        /* Create property list for chunking and compression */
+        dcpl = H5Pcreate(H5P_DATASET_CREATE);
+        VRFY((dcpl > 0), "H5Pcreate succeeded");
+
+        ret=H5Pset_layout(dcpl, H5D_CHUNKED);
+        VRFY((ret >= 0), "H5Pset_layout succeeded");
+
+        /* Use eight chunks */
+        chunk_dim=dim/8;
+        ret=H5Pset_chunk(dcpl, rank, &chunk_dim);
+        VRFY((ret >= 0), "H5Pset_chunk succeeded");
+
+        ret=H5Pset_deflate(dcpl, 9);
+        VRFY((ret >= 0), "H5Pset_deflate succeeded");
+
+        /* Create dataspace */
+        dataspace = H5Screate_simple(rank, &dim, NULL);
+        VRFY((dataspace > 0), "H5Screate_simple succeeded");
+
+        /* Create dataset */
+        dataset = H5Dcreate(fid, "compressed_data", H5T_NATIVE_INT, dataspace, dcpl); 
+        VRFY((dataset > 0), "H5Screate_simple succeeded");
+
+        /* Write compressed data */
+        ret=H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data_orig);
+        VRFY((ret >= 0), "H5Dwrite succeeded");
+
+        /* Close objects */
+        ret=H5Pclose(dcpl);
+        VRFY((ret >= 0), "H5Pclose succeeded");
+        ret=H5Sclose(dataspace);
+        VRFY((ret >= 0), "H5Sclose succeeded");
+        ret=H5Dclose(dataset);
+        VRFY((ret >= 0), "H5Dclose succeeded");
+        ret=H5Fclose(fid);
+        VRFY((ret >= 0), "H5Fclose succeeded");
+    }
+
+    /* Wait for file to be created */
+    MPI_Barrier(comm);
+
+    /* -------------------
+     * OPEN AN HDF5 FILE
+     * -------------------*/
+
+    /* setup file access template */
+    acc_tpl = create_faccess_plist(comm, info, facc_type, use_gpfs);
+    VRFY((acc_tpl >= 0), "");
+
+    /* open the file collectively */
+    fid=H5Fopen(filename,H5F_ACC_RDWR,acc_tpl);
+    VRFY((fid > 0), "H5Fopen succeeded");
+
+    /* Release file-access template */
+    ret=H5Pclose(acc_tpl);
+    VRFY((ret >= 0), "H5Pclose succeeded");
+
+
+    /* Open dataset with compressed chunks */
+    dataset = H5Dopen(fid, "compressed_data");
+    VRFY((dataset > 0), "H5Dopen succeeded");
+
+    /* Try reading & writing data */
+    if(dataset>0) {
+        /* Create dataset transfer property list */
+        xfer_plist = H5Pcreate(H5P_DATASET_XFER);
+        VRFY((xfer_plist > 0), "H5Pcreate succeeded");
+
+        ret=H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_COLLECTIVE);
+        VRFY((ret >= 0), "H5Pset_dxpl_mpio succeeded");
+
+        /* Try reading the data */
+        ret=H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, xfer_plist, data_read);
+        VRFY((ret >= 0), "H5Pset_dxpl_mpio succeeded");
+
+        /* Verify data read */
+        for(u=0; u<dim; u++)
+            if(data_orig[u]!=data_read[u]) {
+                printf("Line #%d: written!=retrieved: data_orig[%u]=%d, data_read[%u]=%d\n",__LINE__,
+                    (unsigned)u,data_orig[u],(unsigned)u,data_read[u]);
+                nerrors++;
+            }
+
+        /* Writing to the compressed, chunked dataset in parallel should fail */
+        H5E_BEGIN_TRY {
+            ret=H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, xfer_plist, data_read);
+        } H5E_END_TRY;
+        VRFY((ret < 0), "H5Dwrite failed");
+
+        ret=H5Pclose(xfer_plist);
+        VRFY((ret >= 0), "H5Pclose succeeded");
+        ret=H5Dclose(dataset);
+        VRFY((ret >= 0), "H5Dclose succeeded");
+    } /* end if */
+
+    ret=H5Fclose(fid);
+    VRFY((ret >= 0), "H5Fclose succeeded");
+
+    /* release data buffers */
+    if (data_read) HDfree(data_read);
+    if (data_orig) HDfree(data_orig);
+}
+#endif /* H5_HAVE_FILTER_DEFLATE */
+
diff --git a/testpar/t_file.c b/testpar/t_file.c
index c83a1af..6fcde32 100644
--- a/testpar/t_file.c
+++ b/testpar/t_file.c
@@ -12,8 +12,6 @@
  * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/* $Id$ */
-
 /*
  * Parallel tests for file operations
  */
diff --git a/testpar/t_mdset.c b/testpar/t_mdset.c
index e437b22..191a1f8 100644
--- a/testpar/t_mdset.c
+++ b/testpar/t_mdset.c
@@ -12,8 +12,6 @@
  * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/* $Id$ */
-
 #include "testphdf5.h"
 
 #define DIM  2
@@ -1291,6 +1289,295 @@ void get_slab(hssize_t chunk_origin[],
         count[0] = count[1] = 1;
 }
 
+/* 
+ * This function is based on bug demonstration code provided by Thomas
+ * Guignon (thomas.guignon@ifp.fr), and is intended to verify the 
+ * correctness of my fix for that bug.
+ *
+ * In essence, the bug appeared when at least one process attempted to 
+ * write a point selection -- for which collective I/O is not supported, 
+ * and at least one other attempted to write some other type of selection 
+ * for which collective I/O is supported.  
+ *
+ * Since the processes did not compare notes before performing the I/O, 
+ * some would attempt collective I/O while others performed independent
+ * I/O.  A hang resulted.
+ *
+ * This function reproduces this situation.  At present the test hangs
+ * on failure.
+ *                                         JRM - 9/13/04
+ *
+ * Changes:	None.
+ */
+
+#define N 4
+
+void io_mode_confusion(void)
+{
+    /*
+     * HDF5 APIs definitions
+     */
+    
+    const int   rank = 1;
+    const char *dataset_name = "IntArray";
+
+    hid_t       file_id, dset_id;         /* file and dataset identifiers */
+    hid_t       filespace, memspace;      /* file and memory dataspace */
+                                          /* identifiers               */
+    hsize_t     dimsf[1];                 /* dataset dimensions */
+    int         data[N] = {1};            /* pointer to data buffer to write */ 
+    hssize_t    select[N] = {0L,1L,2L,3L};
+    hssize_t    start[1];
+    hsize_t stride[1];
+    hsize_t count[1];
+    hsize_t block[1];
+    hid_t       plist_id;                 /* property list identifier */
+    int         i;
+    herr_t      status;
+
+
+    /*
+     * MPI variables
+     */
+
+    int mpi_size, mpi_rank;
+
+
+    /*
+     * test bed related variables
+     */
+
+    char *		fcn_name = "io_mode_confusion";
+    const hbool_t	verbose = FALSE;
+    H5Ptest_param_t *	pt;
+    char *		filename;
+
+
+    pt = (H5Ptest_param_t *) GetTestParameters();
+    filename = pt->name;
+
+    MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
+    MPI_Comm_size(MPI_COMM_WORLD, &mpi_size);
+
+    /*
+     * Set up file access property list with parallel I/O access
+     */
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Setting up property list.\n", 
+                  mpi_rank, fcn_name);
+
+    plist_id = H5Pcreate(H5P_FILE_ACCESS);
+
+    VRFY((plist_id != -1), "H5Pcreate() failed");
+
+    status = H5Pset_fapl_mpio(plist_id, MPI_COMM_WORLD, MPI_INFO_NULL);
+
+    VRFY(( status >= 0 ), "H5Pset_fapl_mpio() failed");
+
+
+    /*
+     * Create a new file collectively and release property list identifier.
+     */
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Creating new file.\n", mpi_rank, fcn_name);
+
+    file_id = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, plist_id);
+
+    VRFY(( file_id >= 0 ), "H5Fcreate() failed");
+
+    status = H5Pclose(plist_id);
+
+    VRFY(( status >= 0 ), "H5Pclose() failed");
+
+
+    /*
+     * Create the dataspace for the dataset.
+     */
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Creating the dataspace for the dataset.\n",
+                  mpi_rank, fcn_name);
+
+    dimsf[0] = N;
+
+    filespace = H5Screate_simple(rank, dimsf, NULL);
+
+    VRFY(( filespace >= 0 ), "H5Screate_simple() failed.");
+
+
+    /*
+     * Create the dataset with default properties and close filespace.
+     */
+
+    if ( verbose )
+        HDfprintf(stdout,
+                  "%0d:%s: Creating the dataset, and closing filespace.\n",
+                  mpi_rank, fcn_name);
+
+    dset_id = H5Dcreate(file_id, dataset_name, H5T_NATIVE_INT, filespace,
+                        H5P_DEFAULT);
+
+    VRFY(( dset_id >= 0 ), "H5Dcreate() failed");
+
+    status = H5Sclose(filespace);
+
+    VRFY(( status >= 0 ), "H5Sclose() failed");
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Calling H5Screate_simple().\n", 
+                  mpi_rank, fcn_name);
+
+    memspace = H5Screate_simple(rank, dimsf, NULL);
+
+    VRFY(( memspace >= 0 ), "H5Screate_simple() failed.");
+
+
+    if( mpi_rank == 0 ) {
+     
+        if ( verbose )
+            HDfprintf(stdout, "%0d:%s: Calling H5Sselect_all(memspace).\n",
+                      mpi_rank, fcn_name);
+
+        status = H5Sselect_all(memspace);
+
+        VRFY(( status >= 0 ), "H5Sselect_all() failed");
+
+    } else {
+
+        if ( verbose )
+            HDfprintf(stdout, "%0d:%s: Calling H5Sselect_none(memspace).\n",
+                      mpi_rank, fcn_name);
+
+        status = H5Sselect_none(memspace);
+
+        VRFY(( status >= 0 ), "H5Sselect_none() failed");
+     
+    }
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Calling MPI_Barrier().\n", 
+                  mpi_rank, fcn_name);
+
+    MPI_Barrier(MPI_COMM_WORLD);
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Calling H5Dget_space().\n", 
+                  mpi_rank, fcn_name);
+
+    filespace = H5Dget_space(dset_id);
+
+    VRFY(( filespace >= 0 ), "H5Dget_space() failed");
+
+
+    start[0] = 0L;
+    stride[0] = 1;
+    count[0] = 1;
+    block[0] = N;
+
+    if ( mpi_rank == 0 ) {
+
+        /* select all */
+
+        if ( verbose )
+             HDfprintf(stdout,
+                       "%0d:%s: Calling H5Sselect_elements() -- set up hang?\n",
+                       mpi_rank, fcn_name);
+
+        status = H5Sselect_elements(filespace, H5S_SELECT_SET, N, 
+                                    (const hssize_t **)&select);
+
+        VRFY(( status >= 0 ), "H5Sselect_elements() failed");
+
+    } else {
+
+        /* select nothing */
+
+        if ( verbose )
+            HDfprintf(stdout, "%0d:%s: Calling H5Sselect_none().\n",
+                      mpi_rank, fcn_name);
+
+        status = H5Sselect_none(filespace);
+
+        VRFY(( status >= 0 ), "H5Sselect_none() failed");
+
+    }
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Calling MPI_Barrier().\n", 
+                  mpi_rank, fcn_name);
+
+    MPI_Barrier(MPI_COMM_WORLD);
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Calling H5Pcreate().\n", mpi_rank, fcn_name);
+
+    plist_id = H5Pcreate(H5P_DATASET_XFER);
+
+    VRFY(( plist_id != -1 ), "H5Pcreate() failed");
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Calling H5Pset_dxpl_mpio().\n", 
+                  mpi_rank, fcn_name);
+
+    status = H5Pset_dxpl_mpio(plist_id, H5FD_MPIO_COLLECTIVE);
+
+    VRFY(( status >= 0 ), "H5Pset_dxpl_mpio() failed");
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Calling H5Dwrite() -- hang here?.\n",
+                  mpi_rank, fcn_name);
+
+    status = H5Dwrite(dset_id, H5T_NATIVE_INT, memspace, filespace,
+                      plist_id, data);
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Returned from H5Dwrite(), status=%d.\n", 
+                  mpi_rank, fcn_name, status);
+
+    VRFY(( status >= 0 ), "H5Dwrite() failed");
+
+    /*
+     * Close/release resources.
+     */
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Cleaning up from test.\n", 
+                  mpi_rank, fcn_name);
+
+    status = H5Dclose(dset_id);
+    VRFY(( status >= 0 ), "H5Dclose() failed");
+
+    status = H5Sclose(filespace);
+    VRFY(( status >= 0 ), "H5Dclose() failed");
+
+    status = H5Sclose(memspace);
+    VRFY(( status >= 0 ), "H5Sclose() failed");
+
+    status = H5Pclose(plist_id);
+    VRFY(( status >= 0 ), "H5Pclose() failed");
+
+    status = H5Fclose(file_id);
+    VRFY(( status >= 0 ), "H5Fclose() failed");
+
+
+    if ( verbose )
+        HDfprintf(stdout, "%0d:%s: Done.\n", mpi_rank);
+
+    return;
+
+} /* io_mode_confusion() */
+
+#undef N
+
 /*=============================================================================
  *                         End of t_mdset.c
  *===========================================================================*/
diff --git a/testpar/t_ph5basic.c b/testpar/t_ph5basic.c
index 85b5924..0c92c46 100644
--- a/testpar/t_ph5basic.c
+++ b/testpar/t_ph5basic.c
@@ -11,7 +11,6 @@
  * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
  * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/* $Id$ */
 
 /*
  * Test parallel HDF5 basic components
diff --git a/testpar/testphdf5.c b/testpar/testphdf5.c
index 1db6e9a..d8fb74b 100644
--- a/testpar/testphdf5.c
+++ b/testpar/testphdf5.c
@@ -41,7 +41,7 @@ void *old_client_data;			/* previous error handler arg.*/
 /* FILENAME and filenames must have the same number of names.
  * Use PARATESTFILE in general and use a separated filename only if the file
  * created in one test is accessed by a different test.
- * filenames[0] is reserved as the file name for PARATESTFILE.
+ * FILENAME[0] is reserved as the file name for PARATESTFILE.
  */
 #define PARATESTFILE filenames[0]
 const char *FILENAME[2]={
@@ -334,6 +334,7 @@ int main(int argc, char **argv)
     int mpi_size, mpi_rank;				/* mpi variables */
     H5Ptest_param_t ndsets_params, ngroups_params;
     H5Ptest_param_t collngroups_params;
+    H5Ptest_param_t io_mode_confusion_params;
 
     /* Un-buffer the stdout and stderr */
     setbuf(stderr, NULL);
@@ -384,6 +385,11 @@ int main(int argc, char **argv)
     AddTest("eidsetw2", extend_writeInd2, NULL, 
 	    "extendible dataset independent write #2", PARATESTFILE);
 
+#ifdef H5_HAVE_FILTER_DEFLATE
+    AddTest("cmpdsetr", compress_readAll, NULL, 
+	    "compressed dataset collective read", PARATESTFILE);
+#endif /* H5_HAVE_FILTER_DEFLATE */
+
     ndsets_params.name = PARATESTFILE;
     ndsets_params.count = ndatasets;
     AddTest("ndsetw", multiple_dset_write, NULL, 
@@ -432,6 +438,13 @@ int main(int argc, char **argv)
 	      "collective to independent chunk io",PARATESTFILE);
     }
 
+    io_mode_confusion_params.name  = PARATESTFILE;
+    io_mode_confusion_params.count = 0; /* value not used */
+
+    AddTest("I/Omodeconf", io_mode_confusion, NULL, 
+	    "I/O mode confusion test -- hangs quickly on failure", 
+            &io_mode_confusion_params);
+
     /* Display testing information */
     TestInfo(argv[0]);
 
diff --git a/testpar/testphdf5.h b/testpar/testphdf5.h
index b295317..a01c62e 100644
--- a/testpar/testphdf5.h
+++ b/testpar/testphdf5.h
@@ -133,7 +133,7 @@ typedef int DATATYPE;
 extern int dim0, dim1;				/*Dataset dimensions */
 extern int chunkdim0, chunkdim1;		/*Chunk dimensions */
 extern int nerrors;				/*errors count */
-extern H5E_auto_t old_func;		        /* previous error handler */
+extern H5E_auto_t old_func;			/* previous error handler */
 extern void *old_client_data;			/*previous error handler arg.*/
 extern int facc_type;				/*Test file access type */
 
@@ -162,6 +162,10 @@ void coll_chunk1(void);
 void coll_chunk2(void);
 void coll_chunk3(void);
 void coll_chunk4(void);
+void io_mode_confusion(void);
+#ifdef H5_HAVE_FILTER_DEFLATE
+void compress_readAll(void);
+#endif /* H5_HAVE_FILTER_DEFLATE */
 
 /* commonly used prototypes */
 hid_t create_faccess_plist(MPI_Comm comm, MPI_Info info, int l_facc_type, hbool_t use_gpfs);