80 lines
3.0 KiB
C++
80 lines
3.0 KiB
C++
/**
|
|
* Copyright (c) 2021 OceanBase
|
|
* OceanBase CE is licensed under Mulan PubL v2.
|
|
* You can use this software according to the terms and conditions of the Mulan PubL v2.
|
|
* You may obtain a copy of Mulan PubL v2 at:
|
|
* http://license.coscl.org.cn/MulanPubL-2.0
|
|
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
|
|
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
|
|
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
|
|
* See the Mulan PubL v2 for more details.
|
|
*/
|
|
|
|
#include <gtest/gtest.h>
|
|
#include "lib/net/ob_addr.h"
|
|
#include "lib/hash_func/murmur_hash.h"
|
|
|
|
namespace oceanbase
|
|
{
|
|
using namespace common;
|
|
namespace unittest
|
|
{
|
|
int64_t cal_hash_v1(const uint64_t tenant_id, const common::ObAddr &addr, const int64_t cluster_id)
|
|
{
|
|
// This calculation may cause hash conflicts
|
|
int64_t ret_hash = murmurhash(&tenant_id, sizeof(tenant_id), addr.hash());
|
|
ret_hash = (ret_hash | (cluster_id << 56));
|
|
return ret_hash;
|
|
}
|
|
|
|
int64_t cal_hash_v2(const uint64_t tenant_id, const common::ObAddr &addr, const int64_t cluster_id)
|
|
{
|
|
// ObAddr.hash() only generates a 32-bit value, so the algorithm of shifting cluster_id to the left by 32 bits is effective
|
|
int64_t ret_hash = (addr.hash() | (cluster_id << 48));
|
|
ret_hash = murmurhash(&tenant_id, sizeof(tenant_id), ret_hash);
|
|
return ret_hash;
|
|
}
|
|
|
|
TEST(test_cluster_id_hash_conflict, test_cluster_id_hash)
|
|
{
|
|
common::ObAddr addr;
|
|
addr.parse_from_cstring("127.0.0.1:8080");
|
|
|
|
int64_t tenant_id = OB_SERVER_TENANT_ID;
|
|
|
|
// The binary of 112 and 120 are only one bit different
|
|
int64_t cluster_id_11 = 112;
|
|
int64_t cluster_id_12 = 120;
|
|
|
|
int64_t cluster_id_21 = 111;
|
|
int64_t cluster_id_22 = 112;
|
|
|
|
|
|
// EXPECT_NE(cal_hash_v1(tenant_id, addr, cluster_id_11), cal_hash_v1(tenant_id, addr, cluster_id_12)); // hash conflict
|
|
|
|
EXPECT_NE(cal_hash_v2(tenant_id, addr, cluster_id_11), cal_hash_v2(tenant_id, addr, cluster_id_12));
|
|
EXPECT_NE(cal_hash_v2(tenant_id, addr, cluster_id_21), cal_hash_v2(tenant_id, addr, cluster_id_22));
|
|
|
|
CLOG_LOG(INFO, "v1 ret_hash is ", "result", cal_hash_v1(tenant_id, addr, cluster_id_11));
|
|
CLOG_LOG(INFO, "v1 ret_hash is ", "result", cal_hash_v1(tenant_id, addr, cluster_id_12));
|
|
CLOG_LOG(INFO, "v1 ret_hash is ", "result", cal_hash_v1(tenant_id, addr, cluster_id_21));
|
|
CLOG_LOG(INFO, "v1 ret_hash is ", "result", cal_hash_v1(tenant_id, addr, cluster_id_22));
|
|
|
|
CLOG_LOG(INFO, "v2 ret_hash is ", "result", cal_hash_v2(tenant_id, addr, cluster_id_11));
|
|
CLOG_LOG(INFO, "v2 ret_hash is ", "result", cal_hash_v2(tenant_id, addr, cluster_id_12));
|
|
CLOG_LOG(INFO, "v2 ret_hash is ", "result", cal_hash_v2(tenant_id, addr, cluster_id_21));
|
|
CLOG_LOG(INFO, "v2 ret_hash is ", "result", cal_hash_v2(tenant_id, addr, cluster_id_22));
|
|
|
|
}
|
|
} // namespace unittest
|
|
} // namespace oceanbase
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
OB_LOGGER.set_file_name("test_cluster_id_hash_conflict.log", true);
|
|
OB_LOGGER.set_log_level("INFO");
|
|
CLOG_LOG(INFO, "begin unittest:test_cluster_id_hash_conflict");
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|