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db_bench_init.c
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db_bench_init.c
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//rb-tree implementation
#include"tree/tree.h"
#include <stddef.h>
#include<stdlib.h>
//random number generator
#include"tinymt/tinymt32.h"
#include<assert.h>
#include<string.h>
//time
#include<sys/time.h>
//leveldb
#include<leveldb/c.h>
#include<stdio.h>
//zeromq
#include<czmq.h>
int
main ()
{
unsigned int N_KEYS;
unsigned int N_BATCH;
printf("\n number of keys:");
scanf("%u",&N_KEYS);
printf("\n batch size:");
scanf("%u",&N_BATCH);
tinymt32_t tinymt32;
//initialize random generator
tinymt32_init (&tinymt32, 0);
int iter;
int sec_iter;
int stop;
int counter;
//initialize database
char *errptr = NULL;
leveldb_options_t *options = leveldb_options_create ();
/* initializeOptions */
leveldb_options_set_create_if_missing (options, 1);
leveldb_options_set_write_buffer_size(options,120000000 );
leveldb_options_set_max_open_files(options,800000);
/*open Database */
leveldb_t *db_helper =
leveldb_open (options, "/mnt/database/database_helper", &errptr);
leveldb_t *db = leveldb_open (options, "/mnt/database/database", &errptr);
leveldb_readoptions_t *readoptions = leveldb_readoptions_create ();
leveldb_writeoptions_t *writeoptions = leveldb_writeoptions_create ();
leveldb_writebatch_t* batch=leveldb_writebatch_create();
int64_t diff = zclock_time ();
//write into database_helper
iter=0;
while( iter < N_KEYS)
{
sec_iter=0;
while((iter<N_KEYS) && (sec_iter<N_BATCH)){
unsigned int key = tinymt32_generate_uint32 (&tinymt32);
unsigned int val = tinymt32_generate_uint32 (&tinymt32);
leveldb_writebatch_put (batch,
(const char *) &key, sizeof (int),
(const char *) &val, sizeof (int));
sec_iter++;
iter++;
}
leveldb_write(
db_helper,
writeoptions,
batch,
&errptr);
if(errptr!=NULL){
printf("\n%s",errptr);
}
assert (errptr == NULL);
leveldb_writebatch_clear(batch);
}
leveldb_writebatch_destroy(batch);
diff = zclock_time () - diff;
printf ("\nrandom write: %d", diff);
diff = zclock_time ();
//write sequentially into db
leveldb_iterator_t *liter = leveldb_create_iterator (db_helper,
readoptions);
leveldb_iter_seek_to_first (liter);
while (leveldb_iter_valid (liter))
{
size_t length;
char key[4];
memcpy (key, leveldb_iter_key (liter, &length), 4);
char val[4];
memcpy (val, leveldb_iter_value (liter, &length), 4);
leveldb_iter_get_error (liter, &errptr);
assert (errptr == NULL);
leveldb_put (db,
writeoptions,
(const char *) &key, sizeof (int),
(const char *) &val, sizeof (int), &errptr);
assert (errptr == NULL);
leveldb_iter_next (liter);
}
diff = zclock_time () - diff;
leveldb_close (db);
leveldb_close (db_helper);
}