1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
#include "swmr_common.h"
#define MAX_REMOVE_SIZE 10
static hid_t
open_skeleton(const char *filename, unsigned verbose)
{
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 */
/* Create file access property list */
if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 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);
printf("mdc_config.initial_size = %lu\n", (unsigned long)mdc_config.initial_size);
printf("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)
printf("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);
}
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 */
/* 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)random() % 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)
printf("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("Usage error!\n");
printf("Usage: swmr_remove_writer [-q] [-f <# of shrinks between flushing file contents>] <# of shrinks>\n");
printf("<# of shrinks between flushing file contents> should be 0 (for no flushing) or between 1 and (<# of shrinks> - 1)\n");
printf("Defaults to verbose (no '-q' given) and flushing every 1000 shrinks('-f 1000')\n");
exit(1);
}
int main(int argc, const char *argv[])
{
hid_t fid; /* File ID for file opened */
time_t curr_time; /* Current time, for seeding random number generator */
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 u; /* Local index variable */
/* 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 = atol(argv[u + 1]);
if(flush_count < 0)
usage();
u += 2;
break;
/* Be quiet */
case 'q':
verbose = 0;
u++;
break;
default:
usage();
break;
} /* end switch */
} /* end if */
else {
/* Get the number of records to append */
nshrinks = atol(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) {
printf("Parameters:\n");
printf("\t# of shrinks between flushes = %ld\n", flush_count);
printf("\t# of shrinks = %ld\n", nshrinks);
} /* end if */
/* Create randomized set of numbers */
curr_time = time(NULL);
srandom((unsigned)curr_time);
/* Emit informational message */
if(verbose)
printf("Generating symbol names\n");
/* Generate dataset names */
if(generate_symbols() < 0)
return(-1);
/* Emit informational message */
if(verbose)
printf("Opening skeleton file: %s\n", FILENAME);
/* Open file skeleton */
if((fid = open_skeleton(FILENAME, verbose)) < 0) {
printf("Error opening skeleton file!\n");
exit(1);
} /* end if */
/* Emit informational message */
if(verbose)
printf("Removing records\n");
/* Remove records from datasets */
if(remove_records(fid, verbose, (unsigned long)nshrinks, (unsigned long)flush_count) < 0) {
printf("Error removing records from datasets!\n");
exit(1);
} /* end if */
/* Emit informational message */
if(verbose)
printf("Releasing symbols\n");
/* Clean up the symbols */
if(shutdown_symbols() < 0) {
printf("Error releasing symbols!\n");
exit(1);
} /* end if */
/* Emit informational message */
if(verbose)
printf("Closing objects\n");
/* Close objects opened */
if(H5Fclose(fid) < 0) {
printf("Error closing file!\n");
exit(1);
} /* end if */
return(0);
}
|
