You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
2.6 KiB
86 lines
2.6 KiB
#include "leveldb/db.h"
|
|
#include "leveldb/options.h"
|
|
#include "util/random.h"
|
|
#include <bits/stdc++.h>
|
|
#include <string>
|
|
|
|
using namespace std;
|
|
using namespace leveldb;
|
|
|
|
int main() {
|
|
DB* db = nullptr;
|
|
Options op;
|
|
op.create_if_missing = true;
|
|
DestroyDB("testdb_kv", Options());
|
|
Status status = DB::Open(op, "testdb_kv", &db);
|
|
// assert(status.ok());
|
|
|
|
// string key = "leveldb",value = to_string(0);
|
|
// string res;
|
|
// for(int i = 0; i < 5; i++) {
|
|
// db->Put(WriteOptions(),key,to_string(i));
|
|
// }
|
|
// db->Put(WriteOptions(),key+key,to_string(0));
|
|
// db->Put(WriteOptions(),key+key,to_string(1));
|
|
// sleep(1);
|
|
// auto snapshot = db->GetSnapshot();
|
|
// auto readopts = ReadOptions();
|
|
// readopts.snapshot = snapshot;
|
|
// db->Put(WriteOptions(),key,to_string(10));
|
|
// db->CompactRange(nullptr,nullptr);
|
|
// db->Get(readopts,key,&res);
|
|
// cout<<"with snapshot:"<<res<<endl;
|
|
// res.clear();
|
|
// db->Get(ReadOptions(),key,&res);
|
|
// cout<<"without snapshot:"<<res<<endl;
|
|
|
|
|
|
// string value = "leveldb",key = "abc";
|
|
// db->Delete(WriteOptions(),key);
|
|
// db->Put(WriteOptions(),key,value);
|
|
// const Snapshot *snapshot = db->GetSnapshot();
|
|
// ReadOptions read_op = ReadOptions();
|
|
// read_op.snapshot = snapshot;
|
|
// string result;
|
|
// db->Get(read_op,key,&result);
|
|
// cout<<result<<endl;
|
|
// db->Delete(WriteOptions(),key);
|
|
// result.clear();
|
|
// db->Get(read_op,key,&result);
|
|
// cout<<"with snapshot:"<<result<<endl;
|
|
// result.clear();
|
|
// db->Get(ReadOptions(),key,&result);
|
|
// cout<<"without snapshot:"<<result<<endl;
|
|
// db->ReleaseSnapshot(snapshot);
|
|
|
|
string key,value = "leveldb";
|
|
key.resize(1000,'a');
|
|
// value.resize(10,'b');
|
|
value += "index";
|
|
Random ran(0);
|
|
for(int i = 0; i < 100000; i++) {
|
|
for(int j = 0; j < 20; j++) {
|
|
int rand = ran.Uniform(200 * 10);
|
|
string tk = key + std::to_string(rand);
|
|
string tv = value + std::to_string(rand) + "_" + std::to_string(i);
|
|
db->Put(WriteOptions(),tk,tv);
|
|
}
|
|
if(i && i%1000 ==0) {
|
|
std::cout << "iteration:" << i << std::endl;
|
|
}
|
|
}
|
|
std::string res;
|
|
for(int i = 0; i < 10; i++) {
|
|
db->Get(ReadOptions(), key + std::to_string(i), &res);
|
|
std::cout << i << " " << res << std::endl;
|
|
}
|
|
delete db;
|
|
// DB::Open(op,"testdb",&db);
|
|
// key = "abc", value = "";
|
|
// db->Get(ReadOptions(),key,&value);
|
|
// cout<<value;
|
|
// // DestroyDB("testdb",op);
|
|
// delete db;
|
|
|
|
return 0;
|
|
}
|