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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * Copyright by the Board of Trustees of the University of Illinois. *
+ * All rights reserved. *
+ * *
+ * This file is part of HDF5. The full HDF5 copyright notice, including *
+ * terms governing use, modification, and redistribution, is contained in *
+ * the files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic HDF5 document set and *
+ * is linked from the top-level documents page. It can also be found at *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
+ * access to either file, you may request a copy from help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created: swmr_remove_writer.c
+ *
+ * Purpose: Removes data from a randomly selected subset of the datasets
+ * in the SWMR test file.
+ *
+ * This program is intended to run concurrently with the
+ * swmr_remove_reader program. It is also run AFTER a sequential
+ * (not concurrent!) invoking of swmr_writer so the writer
+ * can dump a bunch of data into the datasets. Otherwise,
+ * there wouldn't be much to shrink :)
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/***********/
+/* Headers */
+/***********/
+
+#include "h5test.h"
+#include "swmr_common.h"
+
+/****************/
+/* Local Macros */
+/****************/
+
+/* The maximum number of records to remove in one step */
+#define MAX_REMOVE_SIZE 10
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static hid_t open_skeleton(const char *filename, unsigned verbose, unsigned old);
+static int remove_records(hid_t fid, unsigned verbose, unsigned long nshrinks,
+ unsigned long flush_count);
+static void usage(void);
+
+
+/*-------------------------------------------------------------------------
+ * Function: open_skeleton
+ *
+ * Purpose: Opens the SWMR HDF5 file and datasets.
+ *
+ * Parameters: const char *filename
+ * The filename of the SWMR HDF5 file to open
+ *
+ * unsigned verbose
+ * Whether or not to emit verbose console messages
+ *
+ * Return: Success: The file ID of the opened SWMR file
+ * The dataset IDs are stored in a global array
+ *
+ * Failure: -1
+ *
+ *-------------------------------------------------------------------------
+ */
+static hid_t
+open_skeleton(const char *filename, unsigned verbose, unsigned old)
+{
+ hid_t fid; /* File ID for new HDF5 file */
+ hid_t fapl; /* File access property list */
+ hid_t sid; /* Dataspace ID */
+ hsize_t dim[2]; /* Dataspace dimensions */
+ unsigned u, v; /* Local index variable */
+
+ HDassert(filename);
+
+ /* Create file access property list */
+ if((fapl = h5_fileaccess()) < 0)
+ return -1;
+
+ if(!old) {
+ /* Set to use the latest library format */
+ if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+ return -1;
+ }
+
+#ifdef QAK
+/* Increase the initial size of the metadata cache */
+ {
+ H5AC_cache_config_t mdc_config;
+
+ mdc_config.version = H5AC__CURR_CACHE_CONFIG_VERSION;
+ H5Pget_mdc_config(fapl, &mdc_config);
+ HDfprintf(stderr, "mdc_config.initial_size = %lu\n", (unsigned long)mdc_config.initial_size);
+ HDfprintf(stderr, "mdc_config.epoch_length = %lu\n", (unsigned long)mdc_config.epoch_length);
+ mdc_config.set_initial_size = 1;
+ mdc_config.initial_size = 16 * 1024 * 1024;
+ /* mdc_config.epoch_length = 5000; */
+ H5Pset_mdc_config(fapl, &mdc_config);
+ }
+#endif /* QAK */
+
+#ifdef QAK
+ H5Pset_fapl_log(fapl, "append.log", H5FD_LOG_ALL, (size_t)(512 * 1024 * 1024));
+#endif /* QAK */
+
+ /* Open the file */
+ if((fid = H5Fopen(filename, H5F_ACC_RDWR | H5F_ACC_SWMR_WRITE, fapl)) < 0)
+ return -1;
+
+ /* Close file access property list */
+ if(H5Pclose(fapl) < 0)
+ return -1;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Opening datasets\n");
+
+ /* Open the datasets */
+ for(u = 0; u < NLEVELS; u++)
+ for(v = 0; v < symbol_count[u]; v++) {
+ if((symbol_info[u][v].dsid = H5Dopen2(fid, symbol_info[u][v].name, H5P_DEFAULT)) < 0)
+ return -1;
+ if((sid = H5Dget_space(symbol_info[u][v].dsid)) < 0)
+ return -1;
+ if(2 != H5Sget_simple_extent_ndims(sid))
+ return -1;
+ if(H5Sget_simple_extent_dims(sid, dim, NULL) < 0)
+ return -1;
+ symbol_info[u][v].nrecords = dim[1];
+ } /* end for */
+
+ return fid;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function: remove_records
+ *
+ * Purpose: Removes a specified number of records from random datasets in
+ * the SWMR test file.
+ *
+ * Parameters: hid_t fid
+ * The file ID of the SWMR HDF5 file
+ *
+ * unsigned verbose
+ * Whether or not to emit verbose console messages
+ *
+ * unsigned long nshrinks
+ * # of records to remove from the datasets
+ *
+ * unsigned long flush_count
+ * # of records to write before flushing the file to disk
+ *
+ * Return: Success: 0
+ * Failure: -1
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+remove_records(hid_t fid, unsigned verbose, unsigned long nshrinks, unsigned long flush_count)
+{
+ unsigned long shrink_to_flush; /* # of removals before flush */
+ hsize_t dim[2] = {1,0}; /* Dataspace dimensions */
+ unsigned long u, v; /* Local index variables */
+
+ HDassert(fid >= 0);
+
+ /* Remove records from random datasets, according to frequency distribution */
+ shrink_to_flush = flush_count;
+ for(u = 0; u < nshrinks; u++) {
+ symbol_info_t *symbol; /* Symbol to remove record from */
+ hsize_t remove_size; /* Size to reduce dataset dimension by */
+
+ /* Get a random dataset, according to the symbol distribution */
+ symbol = choose_dataset();
+
+ /* Shrink the dataset's dataspace */
+ remove_size = (hsize_t)HDrandom() % MAX_REMOVE_SIZE + 1;
+ if(remove_size > symbol->nrecords)
+ symbol->nrecords = 0;
+ else
+ symbol->nrecords -= remove_size;
+ dim[1] = symbol->nrecords;
+ if(H5Dset_extent(symbol->dsid, dim) < 0)
+ return -1;
+
+ /* Check for flushing file */
+ if(flush_count > 0) {
+ /* Decrement count of records to write before flushing */
+ shrink_to_flush--;
+
+ /* Check for counter being reached */
+ if(0 == shrink_to_flush) {
+ /* Flush contents of file */
+ if(H5Fflush(fid, H5F_SCOPE_GLOBAL) < 0)
+ return -1;
+
+ /* Reset flush counter */
+ shrink_to_flush = flush_count;
+ } /* end if */
+ } /* end if */
+ } /* end for */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Closing datasets\n");
+
+ /* Close the datasets */
+ for(u = 0; u < NLEVELS; u++)
+ for(v = 0; v < symbol_count[u]; v++)
+ if(H5Dclose(symbol_info[u][v].dsid) < 0)
+ return -1;
+
+ return 0;
+}
+
+static void
+usage(void)
+{
+ printf("\n");
+ printf("Usage error!\n");
+ printf("\n");
+ printf("Usage: swmr_remove_writer [-q] [-o] [-f <# of shrinks between flushing\n");
+ printf(" file contents>] [-r <random seed>] <# of shrinks>\n");
+ printf("\n");
+ printf("<# of shrinks between flushing file contents> should be 0 (for no\n");
+ printf("flushing) or between 1 and (<# of shrinks> - 1)\n");
+ printf("\n");
+ printf("Defaults to verbose (no '-q' given), latest format when opening file (no '-o' given),\n");
+ printf("flushing every 1000 shrinks ('-f 1000'), and will generate a random seed (no -r given).\n");
+ printf("\n");
+ HDexit(1);
+}
+
+int main(int argc, const char *argv[])
+{
+ hid_t fid; /* File ID for file opened */
+ long nshrinks = 0; /* # of times to shrink the dataset */
+ long flush_count = 1000; /* # of records to write between flushing file */
+ unsigned verbose = 1; /* Whether to emit some informational messages */
+ unsigned old = 0; /* Whether to use non-latest-format when opening file */
+ unsigned use_seed = 0; /* Set to 1 if a seed was set on the command line */
+ unsigned random_seed = 0; /* Random # seed */
+ unsigned u; /* Local index variable */
+ int temp;
+
+ /* Parse command line options */
+ if(argc < 2)
+ usage();
+ if(argc > 1) {
+ u = 1;
+ while(u < (unsigned)argc) {
+ if(argv[u][0] == '-') {
+ switch(argv[u][1]) {
+ /* # of records to write between flushing file */
+ case 'f':
+ flush_count = HDatol(argv[u + 1]);
+ if(flush_count < 0)
+ usage();
+ u += 2;
+ break;
+
+ /* Be quiet */
+ case 'q':
+ verbose = 0;
+ u++;
+ break;
+
+ /* Random # seed */
+ case 'r':
+ use_seed = 1;
+ temp = HDatoi(argv[u + 1]);
+ random_seed = (unsigned)temp;
+ u += 2;
+ break;
+
+ /* Use non-latest-format when opening file */
+ case 'o':
+ old = 1;
+ u++;
+ break;
+
+ default:
+ usage();
+ break;
+ } /* end switch */
+ } /* end if */
+ else {
+ /* Get the number of records to append */
+ nshrinks = HDatol(argv[u]);
+ if(nshrinks <= 0)
+ usage();
+
+ u++;
+ } /* end else */
+ } /* end while */
+ } /* end if */
+ if(nshrinks <= 0)
+ usage();
+ if(flush_count >= nshrinks)
+ usage();
+
+ /* Emit informational message */
+ if(verbose) {
+ HDfprintf(stderr, "Parameters:\n");
+ HDfprintf(stderr, "\t# of shrinks between flushes = %ld\n", flush_count);
+ HDfprintf(stderr, "\t# of shrinks = %ld\n", nshrinks);
+ } /* end if */
+
+ /* Set the random seed */
+ if(0 == use_seed) {
+ struct timeval t;
+ HDgettimeofday(&t, NULL);
+ random_seed = (unsigned)(t.tv_usec);
+ } /* end if */
+ HDsrandom(random_seed);
+ /* ALWAYS emit the random seed for possible debugging */
+ HDfprintf(stderr, "Using writer random seed: %u\n", random_seed);
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Generating symbol names\n");
+
+ /* Generate dataset names */
+ if(generate_symbols() < 0)
+ return -1;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Opening skeleton file: %s\n", FILENAME);
+
+ /* Open file skeleton */
+ if((fid = open_skeleton(FILENAME, verbose, old)) < 0) {
+ HDfprintf(stderr, "Error opening skeleton file!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Send a message to indicate "H5Fopen" is complete--releasing the file lock */
+ h5_send_message(WRITER_MESSAGE, NULL, NULL);
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Removing records\n");
+
+ /* Remove records from datasets */
+ if(remove_records(fid, verbose, (unsigned long)nshrinks, (unsigned long)flush_count) < 0) {
+ HDfprintf(stderr, "Error removing records from datasets!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Releasing symbols\n");
+
+ /* Clean up the symbols */
+ if(shutdown_symbols() < 0) {
+ HDfprintf(stderr, "Error releasing symbols!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Closing objects\n");
+
+ /* Close objects opened */
+ if(H5Fclose(fid) < 0) {
+ HDfprintf(stderr, "Error closing file!\n");
+ HDexit(1);
+ } /* end if */
+
+ return 0;
+}