数据量是百万级别,需要考虑迁移速度和用时
一个一个插入太慢,要批量插入
其他方法
https://www.cnblogs.com/kagol/p/5946525.html
百万数据不能一次性查询、获取
mongodb 自带的 skip() 方法,跳跃查询导致虽然做了分页,但大数据环境下还是慢:
query.skip((pageNum - 1) * pageSize);
query.limit(pageSize);
前30万条数据,1秒9000条数据,后来1秒1000条数据,
越到后面越慢!
官方文档也不推荐skip,skip会扫描全部文档,然后再返回结果。
The cursor.skip() method requires the server to scan from the beginning of the input results set before beginning to return results. As the offset increases, cursor.skip() will become slower.
优化:
https://blog.csdn.net/weixin_42267411/article/details/127412376
Criteria criteria = new Criteria();
Query query;
for (long i = 0; i < page; i++) {
query = new Query(criteria).limit(PAGE_LIMIT);
List<BookmarkEntity> mongoList1 =
mongoTemplate.find(query, BookmarkEntity.class);
String id = mongoList1.get(mongoList1.size() - 1).getId();
criteria = Criteria.where("_id").gt(new ObjectId(id));
}
gt > _id > value
lt < _id < value
gte >= _id >= value
lte <= _id <= value
where("_id").lt("xxx")
将查询为空 = 失败:
https://devpress.csdn.net/mongodb/63047f5ac67703293080cc2d.html
解决办法:where("_id").lt(new ObjectId("xxx"))
https://cloud.tencent.com/developer/article/1172517
//Page 1
db.users.find().limit(pageSize);
//Find the id of the last document in this page
last_id = ...
//Page 2
users = db.users.find({
'_id' :{ "$gt":ObjectId("5b16c194666cd10add402c87")}
}).limit(10)
//Update the last id with the id of the last document in this page
last_id = ...
mongo 查询 + 记录表(数据插入 写入)
优化前插入236.4万
数据,用时33分钟
优化后插入240万
数据,用时 144秒
2023-07-21 09:46:19.002 INFO 51696 --- [ main] com.example.controller.Mycontroller : 开始转移 1000 个数据量 - 0
2023-07-21 09:46:19.111 INFO 51696 --- [ main] com.example.controller.Mycontroller : 开始转移 1000 个数据量 - 1
。。。
2023-07-21 09:48:43.217 INFO 51696 --- [ main] com.example.controller.Mycontroller : 本次迁移完毕,已转移数据量:2400000
2023-07-21 09:48:43.217 INFO 51696 --- [ main] com.example.controller.Mycontroller : 数据完全转移成功
https://www.navicat.com.cn/company/aboutus/blog/274-%E5%85%B3%E4%BA%8E-mongodb-%E7%9A%84-_id-%E5%AD%97%E6%AE%B5
_id 是集合中文档的主键,索引
ObjectID 长度为 12 字节:
一个 4 字节的值,表示自 Unix 纪元以来的秒数
一个 3 字节的机器标识符
一个 2 字节的进程 ID
一个 3 字节的计数器,以随机值开始
_id(ObjectId)是由MongoDB自动生成的唯一标识符
_id的生成不是严格按照升序进行,但我们可以通过对_id字段进行排序来按照升序或降序获取文档
Sort.Order.asc是升序 .desc降序
Query query = new Query();
Criteria criteria = Criteria.where("key").is("value");
query.addCriteria(criteria);
//先注入MongoTemplate
query.with(Sort.by(Sort.Order.asc("batch"))); //查询结果按照batch字段升序
List<Client> clients = mongoTemplate.find(query, Client.class, "client_info");
根本行不通的:
Aggregation.newAggregation(
// 关联member表
Aggregation.lookup(
"transfer", // 从表 表名
"bookmark_id", // 如bookmarks被查询主表的bookmark_id
"_id", // 如transfer从表的主键_id
"flag" // 联合查询出的别名,用于多条件查询表明前缀,相当于SQL中的临时表名
),
Aggregation.unwind("transfer", true),
// 查询条件
Aggregation.match(
Criteria.where("flag.id").ne(null) // 若没有这个条件,那后面就要跳转(下一行代码) ne不等于
),
Aggregation.match(
Criteria.where("_id").gt(new ObjectId("xxx")) // 若没有这个条件,那后面就要跳转(下一行代码) ne不等于
),
// 分页:每次只查 PAGE_LIMIT 条数据
Aggregation.limit(PAGE_LIMIT));
mongoTemplate.insert(list,Flag.class);
mongoTemplate.insertAll(list);
两者效率一样
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
@Document(collection = "transfer")
public class Flag {
private String id;
private String flag;
private List<BookmarkEntityCopy> list;
}
insert VS save
插入重复数据
insert: 若新增数据的主键已经存在,则抛 org.springframework.dao.DuplicateKeyException 异常提示主键重复,不保存当前数据
save: 若新增数据的主键已经存在,则会对当前已经存在的数据进行修改操作
批操作
insert: 可以一次性插入一整个列表,而不用进行遍历操作,效率相对较高
save: 需要遍历列表,进行一个个的插入
https://developer.aliyun.com/article/999073#slide-6
/**
* 找出两个集合中不同的元素
*
* @param collmax
* @param collmin
* @return
*/
public static Collection getDifferListByMapPlus(Collection collmax, Collection collmin) {
//使用LinkedList防止差异过大时,元素拷贝
Collection csReturn = new LinkedList();
Collection max = collmax;
Collection min = collmin;
long beginTime = System.currentTimeMillis();
//先比较大小,这样会减少后续map的if判断次数
if (collmax.size() < collmin.size()) {
max = collmin;
min = collmax;
}
//直接指定大小,防止再散列
Map<Object, Integer> map = new HashMap<Object, Integer>(max.size());
for (Object object : max) {
map.put(object, 1);
}
for (Object object : min) {
if (map.get(object) == null) {
csReturn.add(object);
} else {
map.put(object, 2);
}
}
for (Map.Entry<Object, Integer> entry : map.entrySet()) {
if (entry.getValue() == 1) {
csReturn.add(entry.getKey());
}
}
long endTime = System.currentTimeMillis();
System.out.println("集合A和集合B不同的元素:"+csReturn);
System.out.println("使用map方式遍历, 对比耗时: " + (endTime - beginTime)+"毫秒。");
return csReturn;
}
本来我用的是这个办法:
百万数据,对应 原表和记录表
一千一千的查,一个一个对比,似乎不如法1
但mongo数据得分页查询,不能一次性得到全部数据
我的办法反而有优势
// 分页查询
Criteria criteria1 = Criteria.where("_id").ne(null); // ne 是 !=
Query query1 = new Query(criteria1);
long amount = mongoTemplate.count(query1, "transfer");
int PAGE_LIMIT = 1000;
int page = (int) amount / PAGE_LIMIT;
if (amount % PAGE_LIMIT > 0) {
// 余数不为0时,要加1
page += 1;
}
Criteria criteriaT = new Criteria();
Criteria criteriaB = new Criteria();
Query queryT;
Query queryB;
String idT = "0";
String idB = "0";
int indexT = 0;
int indexB = 0;
int count = 0;
List<Flag> mongoListT = null;
for (int i = 0; i < page; i++) {
queryT = new Query(criteriaT).limit(PAGE_LIMIT);
mongoListT = mongoTemplate.find(queryT, Flag.class);
queryB = new Query(criteriaB).limit(PAGE_LIMIT);
List<BookmarkEntity> mongoListB = mongoTemplate.find(queryT, BookmarkEntity.class);
List<Flag> result = new ArrayList<>();
indexT = 0;
indexB = 0;
for (indexT = 0; indexT < PAGE_LIMIT && indexT < mongoListT.size(); indexT++) {
if (!mongoListT.get(indexT).getId().equals(mongoListB.get(indexB).getId())) {
Criteria criteria = Criteria.where("_id").is(new ObjectId(mongoListT.get(indexT).getId()));
Query query = new Query(criteria);
mongoTemplate.remove(query, "transfer");
Map map = new HashMap();
map.put("id", mongoListT.get(indexT).getBookmarkId());
repository.delete(map);
// sqlSession.commit();
count++;
} else {
indexB++;
}
}
idT = mongoListT.get(indexT - 1).getId();
criteriaT = Criteria.where("_id").gt(new ObjectId(idT));
idB = mongoListT.get(indexB - 1).getId();
criteriaB = Criteria.where("_id").gt(new ObjectId(idB));
LOGGER.info("已清理 " + count + " 个数据 - " + i + " / " + page);
sqlSession.commit();
}
原来数据表有自己的主键,还不是自增的
当数据表很大时(10万条数据),再插入数据时,寻找插入位置就很耗时了
再增加一个自增的主键id
删除主键、删除索引
删除主键索引
ALTER TABLE 表名 DROP PRIMARY KEY
删除索引
drop index 索引名 on 表名;
删除 自增长的主键索引:
1 重新定义列类型,去除自增属性
alter table 表名 modify id int ;
2 删除主键
alter table 表名 drop primary key;
添加自增主键,该列(该属性)不存在
alter table 表名 add 属性名 INT primary key AUTO_INCREMENT after 已有属性名;
添加自增主属性,该列已存在
ALTER TABLE 表名 MODIFY 属性名 INT AUTO_INCREMENT;
删除主键有两种情况:
1、如果主键不带自增属性,则可以直接使用drop来删除主键;
2、如果主键带自增属性,则要先将这个列的自动增长属性去掉,才可以删除主键
先插入数据再建索引 vs 先建索引再插入数据
https://blog.csdn.net/weixin_42056745/article/details/101693848
表记录越大,索引个数越多,速度越慢
某表记录有1亿条左右,12个索引
删除全部索引的插入速度 > 保留这12个索引的,插入速度百倍。
原理很简单,边插入边维护索引,开销太大了
240万数据
有主键和索引,17分12秒
仅有主键(非自增),14分45秒
仅有主键(自增),8分15秒
PRIMARY KEY (`bookmarkId`) USING BTREE,
KEY `bookmarks_02` (`sourceTenantCode`) USING BTREE,
KEY `bookmarks_03` (`resType`) USING BTREE,
KEY `bookmarks_04` (`w3Account`) USING BTREE
有主键和索引
023-07-24 09:20:51.866 INFO 34592 --- [ main] com.example.controller.Mycontroller : dataCount = 1
...
2023-07-24 09:38:03.169 INFO 34592 --- [ main] com.example.controller.Mycontroller : dataCount = 2400
仅有主键(非自增)
2023-07-24 10:08:57.143 INFO 34592 --- [ main] com.example.controller.Mycontroller : dataCount = 1
...
2023-07-24 10:23:42.066 INFO 34592 --- [ main] com.example.controller.Mycontroller : dataCount = 2400
仅有主键(自增)
2023-07-24 10:37:36.941 INFO 34592 --- [ main] com.example.controller.Mycontroller : dataCount = 1
...
2023-07-24 10:45:52.961 INFO 34592 --- [ main] com.example.controller.Mycontroller : dataCount = 2400
https://blog.csdn.net/weixin_44117767/article/details/105910170
List<BookmarkEntity> result = new ArrayList<>();
for (BookmarkEntity bookmarkEntity : mongoList1) {
result.add(bookmarkEntity);
}
repository.save(result);
public int save(@Param("list") List<BookmarkEntity> entityMysql);
<insert id="save" parameterType="java.util.List">
insert into bookmarks
(bookmarkId,resKey,title,titleIcon,`desc`,`from`,fromIcon,sourceTenantCode,
sourceModuleCode,sourceAppName,resType,pcUrl,mUrl,welinkUrl,nativeUrl,w3Account,
content,callbackContent,osType,paramsPrivate,createTime,runCount,callBackStatus,
resSupportVersion,updateDate,operaType,extraParm,clientVersion,status,dataSource,
createTimeStr,updateDateStr,oneboxFileType,deleteFlag)
values
<foreach collection ="list" item="bookmarkEntity" separator = ",">
(#{bookmarkEntity.bookmark_id},#{bookmarkEntity.resKey},#{bookmarkEntity.title},#{bookmarkEntity.title_icon},#{bookmarkEntity.desc},#{bookmarkEntity.from},#{bookmarkEntity.from_icon},null,
#{bookmarkEntity.source_moduleCode},#{bookmarkEntity.source_appname},#{bookmarkEntity.resType},#{bookmarkEntity.pcUrl},#{bookmarkEntity.mUrl},#{bookmarkEntity.weLinkUrl},null,#{bookmarkEntity.w3Account},
#{bookmarkEntity.content},#{bookmarkEntity.callback_content},null,null,#{bookmarkEntity.createTime},null,null,
#{bookmarkEntity.res_support_version},#{bookmarkEntity.updateDate},null,null,null,#{bookmarkEntity.status},null,
null,null,#{bookmarkEntity.oneboxFileType},'N')
</foreach >
</insert>
不推荐下面的写法
<foreach collection="list" item="item" index="index" separator=";">
insert into user(name,age) values(#{item.name},#{item.age})
</foreach>
1 每批次可插入的数量减少
2 这种方式执行返回值还是(0、1),是已经尝试插入的最后一条数据是否成功。这种foreach 拼接成的sql语句以分号“;”分隔的多条insert语句。导致前面的数据项都插入成功了。
(默认数据库的事务处理是单条提交的,出错前的执行都是一个个单条语句,所以并并没有回滚数据。)
https://developer.aliyun.com/article/1009263
http://www.imooc.com/article/291781
https://blog.csdn.net/yangxiao_hui/article/details/103262704
连接长度values,效率比较
100 - 11min 43s
200 - 10min 3s
300 - 9min 22s
500 - 8min 53s
1000 - 8min 35s
2000 - 8min 27s
3000 - 8min 36s
5000 - 8min 19s
100
2023-07-24 10:55:46.170 INFO 37340 --- [ main] com.example.controller.Mycontroller : dataCount = 1
...
2023-07-24 11:07:29.916 INFO 37340 --- [ main] com.example.controller.Mycontroller : dataCount = 24000
200
2023-07-24 11:21:07.220 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 1 / 12000
...
2023-07-24 11:31:10.271 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 12000 / 12000
300
2023-07-24 11:32:54.989 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 1 / 8000
...
2023-07-24 11:42:16.303 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 8000 / 8000
500
2023-07-24 11:44:32.770 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 1 / 4800
...
2023-07-24 11:53:25.392 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 4800 / 4800
1000
2023-07-24 12:25:39.500 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 1 / 2400
...
2023-07-24 12:34:04.108 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 2400 / 2400
2000
2023-07-24 13:56:58.899 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 1 / 1200
...
2023-07-24 14:05:24.494 INFO 28312 --- [ main] com.example.controller.Mycontroller : dataCount = 1200 / 1200
3000
2023-07-24 14:27:38.951 INFO 43688 --- [ main] com.example.controller.Mycontroller : dataCount = 1 / 800
...
2023-07-24 14:36:14.054 INFO 43688 --- [ main] com.example.controller.Mycontroller : dataCount = 800 / 800
5000
2023-07-24 14:43:49.472 INFO 43688 --- [ main] com.example.controller.Mycontroller : dataCount = 1 / 480
...
2023-07-24 14:52:08.735 INFO 43688 --- [ main] com.example.controller.Mycontroller : dataCount = 480 / 480
3000长度时报错:
java.sql.BatchUpdateException: Packet for query is too large (4,623,464 > 4,194,304). You can change this value on the server by setting the ‘max_allowed_packet’ variable
4MB = 4*1024KB = 4,194,304B
max_allowed_packet
mysql5.7的客户端默认是16M,服务端默认是4M
我改成100M,然后重启mysql服务
在我这不影响性能
https://blog.csdn.net/chuangxin/article/details/83447387
https://www.bmabk.com/index.php/post/127993.html
在我这不影响性能
https://cloud.tencent.com/developer/article/1888620
锁的总数超过锁表大小
同一时刻有太多的锁被占用,导致锁表大小超出 MySQL 设置的最大值
http://tunzao.me/articles/the-total-number-of-locks-exceeds-the-lock-table-size/
https://blog.csdn.net/weixin_42096792/article/details/118146269
innodb_buffer_pool_size
默认8M,用来指定InnodDB缓存表的数据和索引使用的内存大小
越大磁盘交互就会越少,性能也会越好
删除条件不是主键 + 数据百万,删除会很慢
alter TABLE bookmarks MODIFY `id` int(11) NOT NULL;
Alter table bookmarks drop primary key;
alter TABLE bookmarks MODIFY `bookmarkId` varchar(64) NOT NULL COMMENT '主键ID' PRIMARY KEY;
https://xie.infoq.cn/article/c4dbd1c02192797350e3f6346
这个确实最快
仅主键(非自增)
2023-07-24 19:44:51.111 INFO 41072 --- [ main] com.example.controller.JavaJbdc : 成功插入数据耗时:20 - 0 / 24
...
2023-07-24 19:58:24.843 INFO 41072 --- [ main] com.example.controller.JavaJbdc : 成功插入数据耗时:44 - 23 / 24
2023-07-24 19:58:24.844 INFO 41072 --- [ main] com.example.controller.JavaJbdc : 插入数据共耗时:834秒
13min27s
仅主键(自增)
2023-07-24 20:28:29.594 INFO 30340 --- [ main] com.example.controller.JavaJbdc : 成功插入数据耗时:20 - 1 / 24
...
2023-07-24 20:36:23.555 INFO 30340 --- [ main] com.example.controller.JavaJbdc : 成功插入数据耗时:20 - 24 / 24
7min 54s
https://blog.csdn.net/ztchun/article/details/84894957
先删除主键,在
alter table bookmarks2 drop PRIMARY key;
delimiter //
create procedure batchInsert()
begin
declare num int;
set num=1;
while num<=2400000 do
insert into bookmarks2(`bookmarkId`,`resKey`) values('asdsad', '123456');
set num=num+1;
end while;
end
//
delimiter ; #恢复;表示结束
call batchInsert;
240万数据
无主键,有3个索引 22min 28s
无主键、无索引 22min 28s
自增主键,无索引 22min 52s
先获取我们要转移的数据量有多少
Criteria criteria1 = Criteria.where("_id").gt(new ObjectId(initialId)); // ne 是 !=
Query query1 = new Query(criteria1);
long amount = mongoTemplate.count(query1, BookmarkEntity.class);
分批次转移数据,每次1000数据
记录表插入记录数据 + mysql转移数据
public String findAndSave(String initialId) throws IOException {
SqlSession sqlSession = getSqlSession();
mysqlRepository repository = sqlSession.getMapper(mysqlRepository.class);
try {
LOGGER.info("Start transfer:");
// 分页查询
Criteria criteria1 = Criteria.where("_id").gt(new ObjectId(initialId)); // ne 是 !=
Query query1 = new Query(criteria1);
long amount = mongoTemplate.count(query1, BookmarkEntity.class);
int PAGE_LIMIT = 1000;
int page = (int) amount / PAGE_LIMIT;
if (amount % PAGE_LIMIT > 0) {
// 余数不为0时,要加1
page += 1;
}
Criteria criteria = Criteria.where("_id").gt(new ObjectId(initialId));
Query query;
String id = null;
for (long i = 0; i < page; i++) {
query = new Query(criteria).limit(PAGE_LIMIT);
query.with(Sort.by(Sort.Order.asc("id"))); // 升序排序
List<BookmarkEntity> mongoList1 = mongoTemplate.find(query, BookmarkEntity.class);
id = mongoList1.get(mongoList1.size() - 1).getId();
criteria = Criteria.where("_id").gt(new ObjectId(id));
List<BookmarkEntity> result = new ArrayList<>();
for (BookmarkEntity bookmarkEntity : mongoList1) {
result.add(bookmarkEntity);
}
LOGGER.info("开始转移 " + result.size() + " 个数据量" + " - " + i + " / " + page);
List<Flag> list = result.stream().map(temp -> {
Flag flag = new Flag();
flag.setId(temp.getId());
flag.setBookmarkId(temp.getBookmark_id());
flag.setFlag("Y");
return flag;
}).collect(Collectors.toList());
// mongoTemplate.insert(list,Flag.class);
mongoTemplate.insertAll(list);
repository.save(result);
sqlSession.commit();
}
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
Criteria criteria = Criteria.where("_id").gt(new ObjectId(initialId)); // ne 是 !=
Query query = new Query(criteria);
long amountMongo = mongoTemplate.count(query, BookmarkEntity.class, "bookmarks");
long amountFlag = mongoTemplate.count(query, Flag.class, "transfer");
criteria = Criteria.where("_id").gte(new ObjectId(initialId));
query = new Query(criteria);
query.with(Sort.by(Sort.Order.desc("id")));
BookmarkEntity bookmarkEntity = mongoTemplate.findOne(query, BookmarkEntity.class, "bookmarks");
Flag flag = mongoTemplate.findOne(query, Flag.class, "transfer");
LOGGER.info("本次迁移完毕,已转移数据量:" + amountFlag);
if (amountMongo == amountFlag && bookmarkEntity.getId().equals(flag.getId())) {
LOGGER.info("数据完全迁移成功");
return "success";
} else {
return "continue";
}
}
}
先获取我们要转移的数据量有多少
Criteria criteria1 = Criteria.where("_id").gt(new ObjectId(initialId)); // ne 是 !=
Query query1 = new Query(criteria1);
long amount = mongoTemplate.count(query1, BookmarkEntity.class);
分批次检查数据,每次1000数据
记录表删除记录数据 + mysql删除数据
mongo记录表对应的list每次能到最底
mongo数据表不一定到最底
idT = mongoListT.get(indexT - 1).getId();
criteriaT = Criteria.where("_id").gt(new ObjectId(idT));
idB = mongoListT.get(indexB - 1).getId();
criteriaB = Criteria.where("_id").gt(new ObjectId(idB));
public String findAndDelete() throws IOException {
SqlSession sqlSession = getSqlSession();
mysqlRepository repository = sqlSession.getMapper(mysqlRepository.class);
try {
LOGGER.info("Start check:");
// 分页查询
Criteria criteria1 = Criteria.where("_id").ne(null); // ne 是 !=
Query query1 = new Query(criteria1);
long amount = mongoTemplate.count(query1, "transfer");
int PAGE_LIMIT = 1000;
int page = (int) amount / PAGE_LIMIT;
if (amount % PAGE_LIMIT > 0) {
// 余数不为0时,要加1
page += 1;
}
Criteria criteriaT = new Criteria();
Criteria criteriaB = new Criteria();
Query queryT;
Query queryB;
String idT = "0";
String idB = "0";
int indexT = 0;
int indexB = 0;
int count = 0;
List<Flag> mongoListT = null;
for (int i = 0; i < page; i++) {
queryT = new Query(criteriaT).limit(PAGE_LIMIT);
mongoListT = mongoTemplate.find(queryT, Flag.class);
queryB = new Query(criteriaB).limit(PAGE_LIMIT);
List<BookmarkEntity> mongoListB = mongoTemplate.find(queryT, BookmarkEntity.class);
List<Flag> result = new ArrayList<>();
indexT = 0;
indexB = 0;
for (indexT = 0; indexT < PAGE_LIMIT && indexT < mongoListT.size(); indexT++) {
if (!mongoListT.get(indexT).getId().equals(mongoListB.get(indexB).getId())) {
Criteria criteria = Criteria.where("_id").is(new ObjectId(mongoListT.get(indexT).getId()));
Query query = new Query(criteria);
mongoTemplate.remove(query, "transfer");
Map map = new HashMap();
map.put("id", mongoListT.get(indexT).getBookmarkId());
repository.delete(map);
// sqlSession.commit();
count++;
} else {
indexB++;
}
}
idT = mongoListT.get(indexT - 1).getId();
criteriaT = Criteria.where("_id").gt(new ObjectId(idT));
idB = mongoListT.get(indexB - 1).getId();
criteriaB = Criteria.where("_id").gt(new ObjectId(idB));
LOGGER.info("已清理 " + count + " 个数据 - " + i + " / " + page);
sqlSession.commit();
}
// 处理 新增数据
LOGGER.info("处理新增数据");
while (!findAndSave(mongoListT.get(indexT - 1).getId()).equals("success")) {
}
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
LOGGER.info("本次数据检查完毕");
Criteria criteria = new Criteria();// ne 是 !=
Query query = new Query(criteria);
long amountMongo = mongoTemplate.count(query, BookmarkEntity.class, "bookmarks");
long amountFlag = mongoTemplate.count(query, Flag.class, "transfer");
query = new Query(criteria);
query.with(Sort.by(Sort.Order.desc("id")));
BookmarkEntity bookmarkEntity = mongoTemplate.findOne(query, BookmarkEntity.class, "bookmarks");
Flag flag = mongoTemplate.findOne(query, Flag.class, "transfer");
if (amountMongo == amountFlag && bookmarkEntity.getId().equals(flag.getId())) {
LOGGER.info("数据完全迁移成功");
return "success";
} else {
return "continue";
}
}
}