struct TSDB_metric_t * TSDB_create(struct TSDB_create_opts_t *opts) {
int fd, write_len,len;
int size = sizeof(unsigned long long);
int version = 1;
assert(opts->magic == TSDB_create_opts_magic);
assert(opts->columns > 0);
if(!opts->created_time)
opts->created_time = time(NULL);
if(!opts->resolution)
opts->resolution = 60;
fd = open(opts->filename, O_CREAT | O_RDWR | O_EXCL, 0755);
if(fd == -1)
printf("Cannot open %s (%s)\n", opts->filename, strerror(errno));
assert(fd != -1);
write_len = write(fd, &size, 4);
assert(write_len == 4);
write_len = write(fd, &version, 4);
assert(write_len == 4);
write_len = write(fd, &opts->resolution, 4);
assert(write_len == 4);
write_len = write(fd, &opts->columns, 4);
assert(write_len == 4);
write_len = write(fd, &opts->created_time, size);
assert(write_len == size);
len = strlen(opts->name) + 1;
write_len = write(fd, &opts->flags, 4);
assert(write_len == 4);
write_len = write(fd, &len, 4);
assert(write_len == 4);
write_len = write(fd, opts->name, strlen(opts->name)+1);
assert(write_len == strlen(opts->name)+1);
int i;
for(i = 0; i < opts->columns; i++) {
len = strlen(opts->col_names[i]) + 1;
write_len = write(fd, &opts->col_flags[i], 4);
assert(write_len == 4);
write_len = write(fd, &len, 4);
assert(write_len == 4);
write_len = write(fd, opts->col_names[i], len);
assert(write_len == len);
}
close(fd);
return TSDB_open(opts->filename);
}
int agg_main(int argc, char * const *argv) {
int o, start, end, interval, column, difference;
char *filename = 0;
difference = column = start = end = interval = 0;
while ((o = getopt(argc, argv,
"f:s:e:i:h:c:d")) != -1) {
switch(o) {
case 'd':
difference = 1;
break;
case 'c':
column = atoi(optarg);
break;
case 'f':
filename = malloc(strlen(optarg)+1);
memcpy(filename, optarg, strlen(optarg)+1);
break;
case 's':
start = atoi(optarg);
break;
case 'e':
end = atoi(optarg);
break;
case 'i':
interval = atoi(optarg);
break;
}
}
if(!filename || !start || !end || !interval) {
WARN("Usage: ngr agg [options]\n");
return agg_usage();
}
int flags;
if (difference)
flags = TSDB_COUNTER;
else
flags = TSDB_GAUGE;
struct TSDB_metric_t *metric = TSDB_open(filename);
struct TSDB_range_t *range = TSDB_timespan(metric, start, end);
struct TSDB_range_t *aggregate = TSDB_aggregate(range, interval, flags);
int rows = aggregate->rows;
int i = 0;
while(rows--) {
int offset = ((i * aggregate->columns) + column);
printf("AVG: %.4f MAX: %llu MIN: %llu STDDEV: %f\n", aggregate->agg[offset].avg, aggregate->agg[offset].max, aggregate->agg[offset].min, aggregate->agg[offset].stddev);
i++;
}
return 0;
}
