int main(int argc, char** argv)
{
DB* db;
Options options;
options.create_if_missing = true;
Status status = DB::Open(options, "/tmp/leveldbtest", &db);
if (false == status.ok()) {
cerr << "Unable to open/create test database" << endl;
cerr << status.ToString() << endl;
return 1;
}
// write
WriteOptions writeOptions;
for (unsigned int i = 0; i < 256; ++i) {
ostringstream keyStream;
keyStream << "Key" << i;
ostringstream valueStream;
valueStream << "Test data value: " << i;
db->Put(writeOptions, keyStream.str(), valueStream.str());
this_thread::sleep_for(std::chrono::seconds(1));
}
// Close the database
delete db;
return 0;
}
int main()
{
int ret;
DB *db;
struct Options op;
op.create_if_missing = true;
Status s = DB::Open(op, "/tmp/testdb", &db);
char *value = (char *)malloc(1024 * 1024);
if (value == NULL)
{
cout << "malloc error" << endl;
return -1;
}
memset(value, 0, 1024*1024);
if (s.ok())
{
cout << "create db successfully!"<<endl;
int i = 0;
for (i = 0; i < 50; i++)
{
char temp[10] = {0};
sprintf(temp, "%d", i);
s = db->Put(WriteOptions(), temp, value);
if (s.ok())
{
cout << "put " << temp << " successful" << endl;
}
else
{
cout << "put " << temp << " failed" << endl;
}
}
Iterator *iter = db->NewIterator(ReadOptions());
for (iter->SeekToFirst(); iter->Valid(); iter->Next())
{
cout << "key is " << iter->key().data() << ", value is " << iter->value().data() << endl;
iter->Next();
}
delete iter;
}
else
{
cout << "create failed " << endl;
}
delete db;
return 0;
}
int main( int argc, char* argv[])
{
DB* db;
Options options;
options.create_if_missing = true;
leveldb::Status status = leveldb::DB::Open(options, "db/testdb", &db);
string line;
int n=0;
while( getline(cin, line))
{
size_t i=line.find('\t' );
if( i == string::npos )
continue;
db->Put(leveldb::WriteOptions(), line.substr(0, i), line.substr(i+1));
++n;
if( ( n & 0xFFF ) == 0 )
cout << n << endl;
}
return 0;
}
int main(int argc, char** argv) {
srand (time(NULL));
if(argc != 3){
cout<<"invalid parameter!!"<<endl;
return 0;
}
string key, val;
int type = atoi(argv[1]);
int counter = 0;
if(type == 3){
key = argv[2];
}
else{
counter = atoi(argv[2]);
}
cout<<"type:"<<type<<endl;
cout<<"counter:"<<counter<<endl;
DB* db;
Options options;
// Optimize RocksDB. This is the easiest way to get RocksDB to perform well
options.IncreaseParallelism();
options.OptimizeLevelStyleCompaction();
// create the DB if it's not already present
options.create_if_missing = true;
// open DB
Status s = DB::Open(options, kDBPath, &db);
assert(s.ok());
if(type == 3){
s = db->Get(ReadOptions(), key, &val);
cout<<"ret:"<<val<<endl;
}
else if(type == 1){
time_t now = time(NULL);
for(int i = 0; i < counter ; i++){
key = "key_" + boost::lexical_cast<string>(i);
val = "val_" + boost::lexical_cast<string>(i)+"_" +boost::lexical_cast<string>(now);
s = db->Put(WriteOptions(), key, val);
}
}
else if(type == 2){
int k;
for(int i = 0; i < counter ; i++){
k = rand() % counter;
key = "key_" + boost::lexical_cast<string>(k);
s = db->Get(ReadOptions(), key, &val);
}
cout<<key<<":"<<val<<endl;
}
delete db;
return 0;
}