rocksdb 入门教程
时间: 2023-06-08 12:06:20 浏览: 241
rocksdb install
你好,以下是 rocksdb 的入门教程:
RocksDB 是一个高效、持久化的键值存储库,由 Facebook 开发。
1. 准备环境和安装 RocksDB:
- 安装 rocksdb library:https://github.com/facebook/rocksdb/blob/master/INSTALL.md
- 安装 C++ 编译器
2. 创建一个 RocksDB 数据库:
```
#include <rocksdb/db.h>
int main() {
rocksdb::DB* db;
rocksdb::Options options;
options.create_if_missing = true;
rocksdb::Status status = rocksdb::DB::Open(options, "/path/to/db", &db);
assert(status.ok());
delete db;
return 0;
}
```
3. 写入数据到 RocksDB 数据库:
```
#include <rocksdb/db.h>
int main() {
rocksdb::DB* db;
rocksdb::Options options;
options.create_if_missing = true;
rocksdb::Status status = rocksdb::DB::Open(options, "/path/to/db", &db);
assert(status.ok());
rocksdb::Status put_status = db->Put(rocksdb::WriteOptions(), "key1", "value1");
assert(put_status.ok());
std::string value;
rocksdb::Status get_status = db->Get(rocksdb::ReadOptions(), "key1", &value);
assert(get_status.ok());
std::cout << value << std::endl;
delete db;
return 0;
}
```
4. 读取数据并遍历 RocksDB 数据库:
```
#include <rocksdb/db.h>
int main() {
rocksdb::DB* db;
rocksdb::Options options;
options.create_if_missing = true;
rocksdb::Status status = rocksdb::DB::Open(options, "/path/to/db", &db);
assert(status.ok());
rocksdb::Iterator* it = db->NewIterator(rocksdb::ReadOptions());
for (it->SeekToFirst(); it->Valid(); it->Next()) {
std::cout << it->key().ToString() << ": " << it->value().ToString() << std::endl;
}
assert(it->status().ok());
delete it;
delete db;
return 0;
}
```
希望这个入门教程能够帮助你学习 RocksDB。如果有任何问题,请随时与我交流。
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