/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by The HDF Group. * * 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 COPYING file, which can be found at the root of the source code * * distribution tree, or in https://www.hdfgroup.org/licenses. * * If you do not have access to either file, you may request a copy from * * help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /*------------------------------------------------------------------------- * * Created: swmr_sparse_reader.c * * Purpose: Reads data from a randomly selected subset of the datasets * in the SWMR test file. Unlike the regular reader, these * datasets will be shrinking. * * This program is intended to run concurrently with the * swmr_sparse_writer program. * *------------------------------------------------------------------------- */ /***********/ /* Headers */ /***********/ #include "h5test.h" #include "swmr_common.h" /****************/ /* Local Macros */ /****************/ #define TIMEOUT 300 /*******************/ /* Local Variables */ /*******************/ static hid_t symbol_tid = (H5I_INVALID_HID); /********************/ /* Local Prototypes */ /********************/ static int check_dataset(hid_t fid, unsigned verbose, const symbol_info_t *symbol, symbol_t *record, hid_t rec_sid); static int read_records(const char *filename, unsigned verbose, unsigned long nrecords, unsigned poll_time, unsigned reopen_count); static void usage(void); /*------------------------------------------------------------------------- * Function: check_dataset * * Purpose: For a given dataset, checks to make sure that the stated * and actual sizes are the same. If they are not, then * we have an inconsistent dataset due to a SWMR error. * * Parameters: hid_t fid * The SWMR test file's ID. * * unsigned verbose * Whether verbose console output is desired. * * const symbol_info_t *symbol * The dataset from which to read (the ID is in the struct). * Must be pre-allocated. * * symbol_t *record * Memory for the record. Must be pre-allocated. * * hid_t rec_sid * The memory dataspace for access. It's always the same so * there is no need to re-create it every time this function * is called. * * Return: Success: 0 * Failure: -1 * *------------------------------------------------------------------------- */ static int check_dataset(hid_t fid, unsigned verbose, const symbol_info_t *symbol, symbol_t *record, hid_t rec_sid) { hid_t dsid; /* Dataset ID */ hid_t file_sid; /* Dataset's space ID */ hsize_t start[2] = {0, 0}; /* Hyperslab selection values */ hsize_t count[2] = {1, 1}; /* Hyperslab selection values */ assert(fid >= 0); assert(symbol); assert(record); assert(rec_sid >= 0); /* Open dataset for symbol */ if ((dsid = H5Dopen2(fid, symbol->name, H5P_DEFAULT)) < 0) return -1; /* Get the dataset's dataspace */ if ((file_sid = H5Dget_space(dsid)) < 0) return -1; /* Choose the random record in the dataset (will be the same as chosen by * the writer) */ start[1] = (hsize_t)HDrandom() % symbol->nrecords; if (H5Sselect_hyperslab(file_sid, H5S_SELECT_SET, start, NULL, count, NULL) < 0) return -1; /* Emit informational message */ if (verbose) fprintf(stderr, "Symbol = '%s', location = %" PRIuMAX ",%" PRIuMAX "\n", symbol->name, (uintmax_t)start[0], (uintmax_t)start[1]); /* Read record from dataset */ record->rec_id = UINT64_MAX; if (H5Dread(dsid, symbol_tid, rec_sid, file_sid, H5P_DEFAULT, record) < 0) return -1; /* Verify record value */ if (record->rec_id != start[1]) { fprintf(stderr, "*** ERROR ***\n"); fprintf(stderr, "Incorrect record value!\n"); fprintf(stderr, "Symbol = '%s', location = %" PRIuMAX ",%" PRIuMAX ", record->rec_id = %" PRIu64 "\n", symbol->name, (uintmax_t)start[0], (uintmax_t)start[1], record->rec_id); return -1; } /* end if */ /* Close the dataset's dataspace */ if (H5Sclose(file_sid) < 0) return -1; /* Close dataset for symbol */ if (H5Dclose(dsid) < 0) return -1; return 0; } /* end check_dataset() */ /*------------------------------------------------------------------------- * Function: read_records * * Purpose: For a given dataset, checks to make sure that the stated * and actual sizes are the same. If they are not, then * we have an inconsistent dataset due to a SWMR error. * * Parameters: const char *filename * The SWMR test file's name. * * unsigned verbose * Whether verbose console output is desired. * * unsigned long nrecords * The total number of records to read. * * unsigned poll_time * The amount of time to sleep (s). * * unsigned reopen_count * * * Return: Success: 0 * Failure: -1 * *------------------------------------------------------------------------- */ static int read_records(const char *filename, unsigned verbose, unsigned long nrecords, unsigned poll_time, unsigned reopen_count) { hid_t fid; /* File ID */ hid_t aid; /* Attribute ID */ time_t start_time; /* Starting time */ hid_t mem_sid; /* Memory dataspace ID */ symbol_t record; /* The record to add to the dataset */ unsigned seed; /* Seed for random number generator */ unsigned iter_to_reopen = reopen_count; /* # of iterations until reopen */ unsigned long u; /* Local index variable */ hid_t fapl; assert(filename); assert(poll_time != 0); /* Create file access property list */ if ((fapl = h5_fileaccess()) < 0) return -1; H5Pset_fclose_degree(fapl, H5F_CLOSE_SEMI); /* Emit informational message */ if (verbose) fprintf(stderr, "Opening file: %s\n", filename); /* Open the file */ if ((fid = H5Fopen(filename, H5F_ACC_RDONLY | H5F_ACC_SWMR_READ, fapl)) < 0) return -1; /* Seed the random number generator with the attribute in the file */ if ((aid = H5Aopen(fid, "seed", H5P_DEFAULT)) < 0) return -1; if (H5Aread(aid, H5T_NATIVE_UINT, &seed) < 0) return -1; if (H5Aclose(aid) < 0) return -1; HDsrandom(seed); /* Reset the record */ /* (record's 'info' field might need to change for each record written, also) */ memset(&record, 0, sizeof(record)); /* Create a dataspace for the record to read */ if ((mem_sid = H5Screate(H5S_SCALAR)) < 0) return -1; /* Emit informational message */ if (verbose) fprintf(stderr, "Reading records\n"); /* Get the starting time */ start_time = time(NULL); /* Read records */ for (u = 0; u < nrecords; u++) { symbol_info_t *symbol = NULL; /* Symbol (dataset) */ htri_t attr_exists; /* Whether the sequence number attribute exists */ unsigned long file_u; /* Attribute sequence number (writer's "u") */ /* Get a random dataset, according to the symbol distribution */ symbol = choose_dataset(); /* Fill in "nrecords" field. Note that this depends on the writer * using the same algorithm and "nrecords" */ symbol->nrecords = nrecords / 5; /* Wait until we can read the dataset */ do { /* Check if sequence attribute exists */ if ((attr_exists = H5Aexists_by_name(fid, symbol->name, "seq", H5P_DEFAULT)) < 0) return -1; if (attr_exists) { /* Read sequence number attribute */ if ((aid = H5Aopen_by_name(fid, symbol->name, "seq", H5P_DEFAULT, H5P_DEFAULT)) < 0) return -1; if (H5Aread(aid, H5T_NATIVE_ULONG, &file_u) < 0) return -1; if (H5Aclose(aid) < 0) return -1; /* Check if sequence number is at least u - if so, this should * guarantee that this record has been written */ if (file_u >= u) break; } /* end if */ /* Check for timeout */ if (time(NULL) >= (time_t)(start_time + (time_t)TIMEOUT)) { fprintf(stderr, "Reader timed out\n"); return -1; } /* end if */ /* Pause */ HDsleep(poll_time); /* Retrieve and print the collection of metadata read retries */ if (print_metadata_retries_info(fid) < 0) fprintf(stderr, "Warning: could not obtain metadata retries info\n"); /* Reopen the file */ if (H5Fclose(fid) < 0) return -1; if ((fid = H5Fopen(filename, H5F_ACC_RDONLY | H5F_ACC_SWMR_READ, fapl)) < 0) return -1; iter_to_reopen = reopen_count; } while (1); /* Emit informational message */ if (verbose) fprintf(stderr, "Checking dataset %lu\n", u); /* Check dataset */ if (check_dataset(fid, verbose, symbol, &record, mem_sid) < 0) return -1; memset(&record, 0, sizeof(record)); /* Check for reopen */ iter_to_reopen--; if (iter_to_reopen == 0) { /* Emit informational message */ if (verbose) fprintf(stderr, "Reopening file: %s\n", filename); /* Retrieve and print the collection of metadata read retries */ if (print_metadata_retries_info(fid) < 0) fprintf(stderr, "Warning: could not obtain metadata retries info\n"); /* Reopen the file */ if (H5Fclose(fid) < 0) return -1; if ((fid = H5Fopen(filename, H5F_ACC_RDONLY | H5F_ACC_SWMR_READ, fapl)) < 0) return -1; iter_to_reopen = reopen_count; } /* end if */ } /* end while */ /* Retrieve and print the collection of metadata read retries */ if (print_metadata_retries_info(fid) < 0) fprintf(stderr, "Warning: could not obtain metadata retries info\n"); /* Close file */ if (H5Fclose(fid) < 0) return -1; /* Close the memory dataspace */ if (H5Sclose(mem_sid) < 0) return -1; return 0; } /* end read_records() */ static void usage(void) { printf("\n"); printf("Usage error!\n"); printf("\n"); printf("Usage: swmr_sparse_reader [-q] [-s <# of seconds to wait for writer>]\n"); printf(" [-n <# of reads between reopens>] <# of records>\n"); printf("\n"); printf("Defaults to verbose (no '-q' given), 1 second wait ('-s 1') and 1 read\n"); printf("between reopens ('-r 1')\n"); printf("\n"); printf("Note that the # of records *must* be the same as that supplied to\n"); printf("swmr_sparse_writer\n"); printf("\n"); exit(EXIT_FAILURE); } /* end usage() */ int main(int argc, char *argv[]) { long nrecords = 0; /* # of records to read */ int poll_time = 1; /* # of seconds to sleep when waiting for writer */ int reopen_count = 1; /* # of reads between reopens */ unsigned verbose = 1; /* Whether to emit some informational messages */ unsigned u; /* Local index variables */ /* 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 reads between reopens */ case 'n': reopen_count = atoi(argv[u + 1]); if (reopen_count < 0) usage(); u += 2; break; /* Be quiet */ case 'q': verbose = 0; u++; break; /* # of seconds between polling */ case 's': poll_time = atoi(argv[u + 1]); if (poll_time < 0) usage(); u += 2; break; default: usage(); break; } /* end switch */ } /* end if */ else { /* Get the number of records to read */ nrecords = atol(argv[u]); if (nrecords <= 0) usage(); u++; } /* end else */ } /* end while */ } /* end if */ /* Emit informational message */ if (verbose) { fprintf(stderr, "Parameters:\n"); fprintf(stderr, "\t# of seconds between polling = %d\n", poll_time); fprintf(stderr, "\t# of reads between reopens = %d\n", reopen_count); fprintf(stderr, "\t# of records to read = %ld\n", nrecords); } /* end if */ /* Emit informational message */ if (verbose) fprintf(stderr, "Generating symbol names\n"); /* Generate dataset names */ if (generate_symbols() < 0) { fprintf(stderr, "Error generating symbol names!\n"); exit(EXIT_FAILURE); } /* end if */ /* Create datatype for creating datasets */ if ((symbol_tid = create_symbol_datatype()) < 0) return -1; /* Reading records from datasets */ if (read_records(FILENAME, verbose, (unsigned long)nrecords, (unsigned)poll_time, (unsigned)reopen_count) < 0) { fprintf(stderr, "Error reading records from datasets!\n"); exit(EXIT_FAILURE); } /* end if */ /* Emit informational message */ if (verbose) fprintf(stderr, "Releasing symbols\n"); /* Clean up the symbols */ if (shutdown_symbols() < 0) { fprintf(stderr, "Error releasing symbols!\n"); exit(EXIT_FAILURE); } /* end if */ /* Emit informational message */ if (verbose) fprintf(stderr, "Closing objects\n"); /* Close objects created */ if (H5Tclose(symbol_tid) < 0) { fprintf(stderr, "Error closing symbol datatype!\n"); exit(EXIT_FAILURE); } /* end if */ return 0; }