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libdb/examples/c/ex_bulk.c

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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2001, 2011 Oracle and/or its affiliates. All rights reserved.
*
* $Id$
*/
/*
* ex_bulk - Demonstrate usage of all bulk APIs available in Berkeley DB.
* NOTE: Though this example code generates timing information, it's important
* to note that it is written as code to demonstrate functionality, and is not
* optimized as a benchmark.
*/
#include <sys/types.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#define DATABASE "ex_bulk.db" /* Database name */
#define DATALEN 20 /* The length of data */
#define NS_PER_MS 1000000 /* Nanoseconds in a millisecond */
#define NS_PER_US 1000 /* Nanoseconds in a microsecond */
#define PUTS_PER_TXN 10
#define STRLEN DATALEN - sizeof(int) /* The length of string */
#define UPDATES_PER_BULK_PUT 100
#ifdef _WIN32
#include <sys/timeb.h>
extern int getopt(int, char * const *, const char *);
/* Implement a basic high res timer with a POSIX interface for Windows. */
struct timeval {
time_t tv_sec;
long tv_usec;
};
int gettimeofday(struct timeval *tv, struct timezone *tz)
{
struct _timeb now;
_ftime(&now);
tv->tv_sec = now.time;
tv->tv_usec = now.millitm * NS_PER_US;
return (0);
}
#define CLEANUP_CMD "rmdir EX_BULK /q/s"
#else
#include <sys/time.h>
#include <unistd.h>
#define CLEANUP_CMD "rm -rf EX_BULK"
#endif
#include <db.h>
int bulk_delete(DB_ENV *, DB *, int, int, int *, int *, int);
int bulk_delete_sec(DB_ENV *, DB *, int, int, int *, int *, int);
int bulk_fill(DB_ENV *, DB *, int, int, int *, int *, int);
int bulk_get(DB_ENV *, DB *, int, int, int, int *, int);
int compare_int(DB *, const DBT *, const DBT *);
DB_ENV *db_init(char *, char *, u_int);
int get_first_str(DB *, const DBT *, const DBT *, DBT *);
int get_string(const char *, char *, int);
int main(int, char *[]);
void usage(void);
const char *progname = "ex_bulk"; /* Program name */
const char tstring[STRLEN] = "0123456789abcde"; /* Const string */
struct data {
int id;
char str[STRLEN];
};
int
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
DB *dbp, *sdbp;
DB_ENV *dbenv;
DB_TXN *txnp;
struct timeval start_time, end_time;
double secs;
u_int cache, pagesize;
int biter, ch, count, dups, init, iter, num;
int ret, rflag, sflag, bulk, delete, pair, verbose;
dbp = sdbp = NULL;
dbenv = NULL;
txnp = NULL;
iter = num = 1000000;
dups = init = rflag = sflag = bulk = delete = verbose = 0;
pagesize = 65536;
cache = 1000 * pagesize;
while ((ch = getopt(argc, argv, "c:d:i:n:p:vDIRSU")) != EOF)
switch (ch) {
case 'c':
cache = (u_int)atoi(optarg);
break;
case 'd':
dups = atoi(optarg);
break;
case 'i':
iter = atoi(optarg);
break;
case 'n':
num = atoi(optarg);
break;
case 'p':
pagesize = (u_int)atoi(optarg);
break;
case 'v':
verbose = 1;
break;
case 'D':
delete = 1;
break;
case 'I':
init = 1;
break;
case 'R':
rflag = 1;
break;
case 'S':
sflag = 1;
break;
case 'U':
bulk = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
/* Remove the previous environment and database(s). */
if (!rflag) {
system(CLEANUP_CMD);
system("mkdir EX_BULK");
}
if ((dbenv = db_init("EX_BULK", "ex_bulk", cache)) == NULL)
return (-1);
if (init)
exit(0);
/* Create and initialize database object, open the database. */
if ((ret = db_create(&dbp, dbenv, 0)) != 0) {
fprintf(stderr,
"%s: db_create: %s\n", progname, db_strerror(ret));
exit(EXIT_FAILURE);
}
dbp->set_errfile(dbp, stderr);
dbp->set_errpfx(dbp, progname);
if ((ret = dbp->set_bt_compare(dbp, compare_int)) != 0) {
dbp->err(dbp, ret, "set_bt_compare");
goto err;
}
if ((ret = dbp->set_pagesize(dbp, pagesize)) != 0) {
dbp->err(dbp, ret, "set_pagesize");
goto err;
}
if (dups && (ret = dbp->set_flags(dbp, DB_DUP)) != 0) {
dbp->err(dbp, ret, "set_flags");
goto err;
}
if ((ret = dbenv->txn_begin(dbenv, NULL, &txnp, 0)) != 0)
goto err;
if ((ret = dbp->open(dbp, txnp, DATABASE, "primary", DB_BTREE,
DB_CREATE , 0664)) != 0) {
dbp->err(dbp, ret, "%s: open", DATABASE);
if (txnp != NULL)
(void)txnp->abort(txnp);
goto err;
}
if (sflag) {
/*
* Open secondary database. The keys in secondary database
* are the first charactor in str of struct data in data
* field of primary database.
*/
if ((ret = db_create(&sdbp, dbenv, 0)) != 0) {
fprintf(stderr, "%s: db_create: %s\n",
progname, db_strerror(ret));
exit(EXIT_FAILURE);
}
if ((ret = sdbp->set_flags(sdbp, DB_DUPSORT)) != 0) {
sdbp->err(sdbp, ret, "set_flags");
goto err;
}
if ((ret = sdbp->open(sdbp, txnp, DATABASE, "secondary",
DB_BTREE, DB_CREATE, 0664)) != 0) {
sdbp->err(sdbp, ret, "%s: secondary open", DATABASE);
if (txnp != NULL)
(void)txnp->abort(txnp);
goto err;
}
if ((ret = dbp->associate(dbp, txnp, sdbp, get_first_str,
0)) != 0) {
dbp->err(dbp, ret, "%s: associate", DATABASE);
if (txnp != NULL)
(void)txnp->abort(txnp);
goto err;
}
}
if ((ret = txnp->commit(txnp, 0)) != 0)
goto err;
txnp = NULL;
if (rflag) {
/* Time the get loop. */
(void)gettimeofday(&start_time, NULL);
if ((ret = bulk_get(
dbenv, dbp, num, dups, iter, &count, verbose)) != 0)
goto err;
(void)gettimeofday(&end_time, NULL);
secs =
(((double)end_time.tv_sec * 1000000 +
end_time.tv_usec) -
((double)start_time.tv_sec * 1000000 +
start_time.tv_usec)) / 1000000;
printf("[STAT] Read %d records read using %d batches",
count, iter);
printf(" in %.2f seconds: ", secs);
printf("%.0f records/second\n", (double)count / secs);
} else {
/* Time the fill loop. */
(void)gettimeofday(&start_time, NULL);
if ((ret = bulk_fill(dbenv, dbp, num, dups, &count,
&biter, verbose)) != 0)
goto err;
(void)gettimeofday(&end_time, NULL);
secs = (((double)end_time.tv_sec * 1000000 +
end_time.tv_usec) -
((double)start_time.tv_sec * 1000000 +
start_time.tv_usec)) / 1000000;
printf("[STAT] Insert %d records using %d batches",
count, biter);
printf(" in %.2f seconds: ", secs);
printf("%.0f records/second\n", (double)count / secs);
if (delete) {
if (sflag) {
pair = rand() % 2;
/* Time the delete loop in secondary db */
(void)gettimeofday(&start_time, NULL);
if ((ret = bulk_delete_sec(dbenv, sdbp, num,
pair, &count, &iter, verbose)) != 0)
goto err;
(void)gettimeofday(&end_time, NULL);
secs = (((double)end_time.tv_sec * 1000000 +
end_time.tv_usec) -
((double)start_time.tv_sec * 1000000 +
start_time.tv_usec)) / 1000000;
printf("[STAT] Delete %d %s using %d batches",
count, (pair) ? "records" : "keys", iter);
printf(" in %.2f seconds: ", secs);
printf("%.0f records/second\n",
(double)count / secs);
} else {
/* Time the delete loop in primary db */
(void)gettimeofday(&start_time, NULL);
if ((ret = bulk_delete(dbenv, dbp, num, dups,
&count, &iter, verbose)) != 0)
goto err;
(void)gettimeofday(&end_time, NULL);
secs = (((double)end_time.tv_sec * 1000000 +
end_time.tv_usec) -
((double)start_time.tv_sec * 1000000 +
start_time.tv_usec)) / 1000000;
printf(
"[STAT] Delete %d records using %d batches",
count, iter);
printf(" in %.2f seconds: ", secs);
printf("%.0f records/second\n",
(double)count / secs);
}
}
}
/* Close everything down. */
if (sflag)
if ((ret = sdbp->close(sdbp, rflag ? DB_NOSYNC : 0)) != 0) {
fprintf(stderr, "%s: DB->close: %s\n",
progname, db_strerror(ret));
return (1);
}
if ((ret = dbp->close(dbp, rflag ? DB_NOSYNC : 0)) != 0) {
fprintf(stderr,
"%s: DB->close: %s\n", progname, db_strerror(ret));
return (1);
}
return (ret);
err:
if (sflag)
(void)sdbp->close(sdbp, 0);
(void)dbp->close(dbp, 0);
return (1);
}
/*
* bulk_delete - bulk_delete from a db
* Since we open/created the db with transactions, we need to delete
* from it with transactions. We'll bundle the deletes UPDATES_PER_BULK_PUT
* to a transaction.
*/
int
bulk_delete(dbenv, dbp, num, dups, countp, iterp, verbose)
DB_ENV *dbenv;
DB *dbp;
int num, dups, verbose;
int *countp, *iterp;
{
DBT key;
DB_TXN *txnp;
struct data *data_val;
u_int32_t flag;
int count, i, j, iter, ret;
void *ptrk;
txnp = NULL;
count = flag = iter = ret = 0;
memset(&key, 0, sizeof(DBT));
j = rand() % num;
/*
* Need to account for proper buffer size, the buffer must be at
* least as large as the page size of the underlying database,
* aligned for unsigned integer access, and be a multiple of 1024
* bytes in size.
*/
key.ulen = (u_int32_t)UPDATES_PER_BULK_PUT *
(sizeof(u_int32_t) + DATALEN) * 1024;
key.flags = DB_DBT_USERMEM | DB_DBT_BULK;
key.data = malloc(key.ulen);
memset(key.data, 0, key.ulen);
data_val = malloc(DATALEN);
memset(data_val, 0, DATALEN);
/*
* If DB_MULTIPLE, delete all records with a specified set of keys
* in a DBT. The DBT is constructed by DB_MULTIPLE_WRITE_NEXT. If
* DB_MULTIPLE_KEY, delete a specific set of key/data pairs in the
* DBT constructed by DB_MULTIPLE_KEY_WRITE_NEXT. Here, delete
* keys before the random key, if there are duplicate records,
* delete duplicate pairs with DB_MULTIPLE_KEY, unless, delete keys
* with DB_MULTIPLE.
*/
flag |= (dups) ? DB_MULTIPLE : DB_MULTIPLE_KEY;
DB_MULTIPLE_WRITE_INIT(ptrk, &key);
for (i = 0; i < j; i++) {
if (i % UPDATES_PER_BULK_PUT == 0) {
if (txnp != NULL) {
if ((ret = txnp->commit(txnp, 0)) != 0)
goto err;
txnp = NULL;
}
if ((ret =
dbenv->txn_begin(dbenv, NULL, &txnp, 0)) != 0)
goto err;
}
if (dups) {
DB_MULTIPLE_WRITE_NEXT(ptrk, &key, &i, sizeof(i));
assert(ptrk != NULL);
count++;
if (verbose)
printf("Delete key: %d\n", i);
} else {
data_val->id = 0;
do {
get_string(tstring, data_val->str, i);
DB_MULTIPLE_KEY_WRITE_NEXT(ptrk, &key, &i,
sizeof(i), data_val, DATALEN);
assert(ptrk != NULL);
count++;
if (verbose)
printf(
"Delete key: %d, \tdata: (id %d, str %s)\n",
i, data_val->id, data_val->str);
} while (++data_val->id < dups);
}
if ((i + 1) % UPDATES_PER_BULK_PUT == 0) {
switch (ret = dbp->del(dbp, txnp, &key, flag)) {
case 0:
iter++;
DB_MULTIPLE_WRITE_INIT(ptrk, &key);
break;
default:
dbp->err(dbp, ret, "Bulk DB->del");
goto err;
}
}
}
if ((j % UPDATES_PER_BULK_PUT) != 0) {
switch (ret = dbp->del(dbp, txnp, &key, flag)) {
case 0:
iter++;
break;
default:
dbp->err(dbp, ret, "Bulk DB->del");
goto err;
}
}
if (txnp != NULL) {
ret = txnp->commit(txnp, 0);
txnp = NULL;
}
*countp = count;
*iterp = iter;
err: if (txnp != NULL)
(void)txnp->abort(txnp);
free(data_val);
free(key.data);
return (ret);
}
/*
* bulk_delete_sec - bulk_delete_sec from a secondary db
*/
int
bulk_delete_sec(dbenv, dbp, num, pair, countp, iterp, verbose)
DB_ENV *dbenv;
DB *dbp;
int num, verbose, pair;
int *countp, *iterp;
{
DBT key;
DB_TXN *txnp;
u_int32_t flag;
int count, i, iter, j, k, rc, ret;
void *ptrk;
char ch;
txnp = NULL;
count = flag = iter = ret = 0;
memset(&key, 0, sizeof(DBT));
rc = rand() % (STRLEN - 1);
/*
* Need to account for proper buffer size, the buffer must be at
* least as large as the page size of the underlying database,
* aligned for unsigned integer access, and be a multiple of
* 1024 bytes in size.
*/
key.ulen = (u_int32_t)UPDATES_PER_BULK_PUT *
(sizeof(u_int32_t) + DATALEN) * 1024;
key.flags = DB_DBT_USERMEM | DB_DBT_BULK;
key.data = malloc(key.ulen);
memset(key.data, 0, key.ulen);
/*
* Bulk delete records from a random key, which is one of charaters
* in tstring. If DB_MULTIPLE, delete all characters before the random
* key in the tstring. If DB_MULTIPLE_KEY, get duplicate data to the
* specified keys and delete key/data pairs.
*/
flag |= (pair) ? DB_MULTIPLE_KEY : DB_MULTIPLE;
DB_MULTIPLE_WRITE_INIT(ptrk, &key);
for (i = 0; i <= rc; i++) {
if (i % UPDATES_PER_BULK_PUT == 0) {
if (txnp != NULL) {
if ((ret = txnp->commit(txnp, 0)) != 0)
goto err;
txnp = NULL;
}
if ((ret = dbenv->txn_begin(
dbenv, NULL, &txnp, 0)) != 0)
goto err;
}
ch = tstring[i];
if (!pair) {
DB_MULTIPLE_WRITE_NEXT(ptrk, &key, &ch, sizeof(ch));
assert(ptrk != NULL);
count++;
if (verbose)
printf("Delete key: %c\n", ch);
} else {
j = 0;
do {
k = j * (STRLEN - 1) + i;
DB_MULTIPLE_KEY_WRITE_NEXT(ptrk, &key, &ch,
sizeof(ch), &k, sizeof(k));
assert(ptrk != NULL);
count++;
if (verbose)
printf(
"Delete secondary key: %c, \tdata: %d\n",
ch, k);
} while (++j < (int)(num / (STRLEN - 1)));
}
if ((i + 1) % UPDATES_PER_BULK_PUT == 0) {
switch (ret = dbp->del(dbp, txnp, &key, flag)) {
case 0:
iter++;
DB_MULTIPLE_WRITE_INIT(ptrk, &key);
break;
default:
dbp->err(dbp, ret, "Bulk DB->del");
goto err;
}
}
}
if ((rc % UPDATES_PER_BULK_PUT) != 0) {
switch (ret = dbp->del(dbp, txnp, &key, flag)) {
case 0:
iter++;
break;
default:
dbp->err(dbp, ret, "Bulk DB->del");
goto err;
}
}
if (txnp != NULL) {
ret = txnp->commit(txnp, 0);
txnp = NULL;
}
*countp = count;
*iterp = iter;
err: if (txnp != NULL)
(void)txnp->abort(txnp);
free(key.data);
return (ret);
}
/*
* bulk_fill - bulk_fill a db
* Since we open/created the db with transactions, we need to populate
* it with transactions. We'll bundle the puts UPDATES_PER_BULK_PUT to a
* transaction.
*/
int
bulk_fill(dbenv, dbp, num, dups, countp, iterp, verbose)
DB_ENV *dbenv;
DB *dbp;
int num, dups, verbose;
int *countp, *iterp;
{
DBT key, data;
u_int32_t flag;
DB_TXN *txnp;
struct data *data_val;
int count, i, iter, ret;
void *ptrk, *ptrd;
txnp = NULL;
count = flag = iter = ret = 0;
ptrk = ptrd = NULL;
data_val = malloc(DATALEN);
memset(data_val, 0, DATALEN);
memset(&key, 0, sizeof(DBT));
memset(&data, 0, sizeof(DBT));
/*
* Need to account for proper buffer size,
* The buffer must be at least as large as the page size of
* the underlying database, aligned for unsigned integer
* access, and be a multiple of 1024 bytes in size.
*/
key.ulen = (u_int32_t) UPDATES_PER_BULK_PUT *
(sizeof(u_int32_t) + DATALEN) * 1024;
key.flags = DB_DBT_USERMEM | DB_DBT_BULK;
key.data = malloc(key.ulen);
memset(key.data, 0, key.ulen);
data.ulen = (u_int32_t)UPDATES_PER_BULK_PUT *
(u_int32_t)DATALEN * 1024;
data.flags = DB_DBT_USERMEM | DB_DBT_BULK;
data.data = malloc(data.ulen);
memset(data.data, 0, data.ulen);
/*
* We could bulk insert with either DB_MULTIPLE in two buffers or
* DB_MULTIPLE_KEY in one buffer. With DB_MULTIPLE, all keys are
* constructed in key DBT, all data is constructed in data DBT.
* With DB_MULTIPLE_KEY, all key/data pairs are constructed in
* the key DBT. Here, we use DB_MULTIPLE mode when there are
* duplicate records.
*/
flag |= (dups) ? DB_MULTIPLE : DB_MULTIPLE_KEY;
DB_MULTIPLE_WRITE_INIT(ptrk, &key);
if (dups)
DB_MULTIPLE_WRITE_INIT(ptrd, &data);
for (i = 0; i < num; i++) {
if (i % UPDATES_PER_BULK_PUT == 0) {
if (txnp != NULL) {
if ((ret = txnp->commit(txnp, 0)) != 0)
goto err;
txnp = NULL;
}
if ((ret =
dbenv->txn_begin(dbenv, NULL, &txnp, 0)) != 0)
goto err;
}
data_val->id = 0;
do {
get_string(tstring, data_val->str, i);
if (dups) {
DB_MULTIPLE_WRITE_NEXT(ptrk, &key,
&i, sizeof(i));
assert(ptrk != NULL);
DB_MULTIPLE_WRITE_NEXT(ptrd, &data,
data_val, DATALEN);
assert(ptrd != NULL);
} else {
DB_MULTIPLE_KEY_WRITE_NEXT(ptrk,
&key, &i, sizeof(i), data_val, DATALEN);
assert(ptrk != NULL);
}
if (verbose)
printf(
"Insert key: %d, \t data: (id %d, str %s)\n",
i, data_val->id, data_val->str);
count++;
} while (++data_val->id < dups);
if ((i + 1) % UPDATES_PER_BULK_PUT == 0) {
switch (ret = dbp->put(dbp, txnp, &key, &data, flag)) {
case 0:
iter++;
DB_MULTIPLE_WRITE_INIT(ptrk, &key);
if (dups)
DB_MULTIPLE_WRITE_INIT(ptrd, &data);
break;
default:
dbp->err(dbp, ret, "Bulk DB->put");
goto err;
}
}
}
if ((num % UPDATES_PER_BULK_PUT) != 0) {
switch (ret = dbp->put(dbp, txnp, &key, &data, flag)) {
case 0:
iter++;
break;
default:
dbp->err(dbp, ret, "Bulk DB->put");
goto err;
}
}
if (txnp != NULL) {
ret = txnp->commit(txnp, 0);
txnp = NULL;
}
*countp = count;
*iterp = iter;
err:
if (txnp != NULL)
(void)txnp->abort(txnp);
free(key.data);
free(data.data);
free(data_val);
return (ret);
}
/*
* bulk_get -- loop getting batches of records.
*/
int
bulk_get(dbenv, dbp, num, dups, iter, countp, verbose)
DB_ENV *dbenv;
DB *dbp;
int num, dups, iter, *countp, verbose;
{
DBC *dbcp;
DBT key, data;
DB_TXN *txnp;
u_int32_t flags, len, klen;
int count, i, j, ret;
void *pointer, *dp, *kp;
klen = count = ret = 0;
dbcp = NULL;
dp = kp = pointer = NULL;
txnp = NULL;
/* Initialize key DBT and data DBT, malloc bulk buffer. */
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
key.data = &j;
key.size = sizeof(j);
data.flags = DB_DBT_USERMEM;
data.data = malloc(DATALEN * 16 * 1024);
memset(data.data, 0, DATALEN * 16 * 1024);
data.ulen = data.size = DATALEN * 16 * 1024;
flags = DB_SET;
flags |= (dups) ? DB_MULTIPLE: DB_MULTIPLE_KEY;
for (i = 0; i < iter; i++) {
if ((ret =
dbenv->txn_begin(dbenv, NULL, &txnp, 0)) != 0)
goto err;
if ((ret = dbp->cursor(dbp, txnp, &dbcp, 0)) != 0)
goto err;
/*
* Bulk retrieve from a random key. Use DB_MULTIPLE_INIT to
* initialize variables for bulk retrieval. If there are
* duplicate records, use DB_MULTIPLE_NEXT to iterate them
* in the buffer. Unless, use DB_MULTIPLE_KEY_NEXT to iterate
* records after the random key.
*/
j = rand() % num;
if ((ret = dbcp->get(dbcp, &key, &data, flags)) != 0)
goto err;
DB_MULTIPLE_INIT(pointer, &data);
if (dups)
while (pointer) {
DB_MULTIPLE_NEXT(pointer, &data, dp, len);
if (dp) {
count++;
if (verbose)
printf(
"Retrieve key: %d, \tdata: (id %d, str %s)\n",
j, ((struct data *)(dp))->id,
(char *)((struct data *)(dp))->str);
}
}
else
while (pointer) {
DB_MULTIPLE_KEY_NEXT(pointer,
&data, kp, klen, dp, len);
if (kp) {
count++;
if (verbose)
printf(
"Retrieve key: %d, \tdata: (id %d, str %s)\n",
*((int *)kp), ((struct data *)(dp))->id,
(char *)((struct data *)(dp))->str);
}
}
if ((ret = dbcp->close(dbcp)) != 0)
goto err;
if ((ret = txnp->commit(txnp, 0)) != 0)
goto err;
}
*countp = count;
err:
if (ret != 0)
dbp->err(dbp, ret, "get");
free(data.data);
return (ret);
}
int
compare_int(dbp, a, b)
DB *dbp;
const DBT *a, *b;
{
int ai, bi;
dbp = NULL;
/*
* Returns:
* < 0 if a < b
* = 0 if a = b
* > 0 if a > b
*/
memcpy(&ai, a->data, sizeof(int));
memcpy(&bi, b->data, sizeof(int));
return (ai - bi);
}
/*
* db_init --
* Initialize the environment.
*/
DB_ENV *
db_init(home, prefix, cachesize)
char *home, *prefix;
u_int cachesize;
{
DB_ENV *dbenv;
int ret;
if ((ret = db_env_create(&dbenv, 0)) != 0) {
dbenv->err(dbenv, ret, "db_env_create");
return (NULL);
}
dbenv->set_errfile(dbenv, stderr);
dbenv->set_errpfx(dbenv, prefix);
(void)dbenv->set_cachesize(dbenv, 0,
cachesize == 0 ? 50 * 1024 * 1024 : (u_int32_t)cachesize, 0);
if ((ret = dbenv->open(dbenv, home, DB_CREATE | DB_INIT_MPOOL |
DB_INIT_TXN | DB_INIT_LOCK, 0)) != 0) {
dbenv->err(dbenv, ret, "DB_ENV->open: %s", home);
(void)dbenv->close(dbenv, 0);
return (NULL);
}
return (dbenv);
}
int
get_first_str(sdbp, key, data, skey)
DB *sdbp;
const DBT *key;
const DBT *data;
DBT *skey;
{
sdbp = NULL;
key = NULL;
memset(skey, 0, sizeof(DBT));
skey->data = ((struct data *)(data->data))->str;
skey->size = sizeof(char);
return (0);
}
int
get_string(src, des, off)
const char *src;
char *des;
int off;
{
int i;
for (i = 0; i < (int)(STRLEN - 1); i++)
des[i] = src[(off + i) % (STRLEN - 1)];
des[STRLEN - 1] = '\0';
return (0);
}
void
usage()
{
(void)fprintf(stderr,
"Usage: %s \n\
-c cachesize [1000 * pagesize] \n\
-d number of duplicates [none] \n\
-i number of read iterations [1000000] \n\
-n number of keys [1000000] \n\
-p pagesize [65536] \n\
-v verbose output \n\
-D perform bulk delete \n\
-I just initialize the environment \n\
-R perform bulk read \n\
-S perform bulk read in secondary database \n\
-U perform bulk update \n",
progname);
exit(EXIT_FAILURE);
}
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