mongodb时间点备份恢复

1：创建测试数据

> use maxiangqian
switched to db maxiangqian
> db.oplogtest.insert({"id":"1"})
WriteResult({ "nInserted" : 1 })
> db.oplogtest.insert({"id":"2"})
WriteResult({ "nInserted" : 1 })
> db.oplogtest.insert({"id":"3"})
WriteResult({ "nInserted" : 1 })

2：做一个全备份

/home/maxiangqian/mongodb-linux-x86_64-rhel62-3.4.2/bin/mongodump --host=10.103.16.34 --port=27017 --db=maxiangqian --out=/home/mongodb/backup/bkm

3：再插入几条测试数据

rsmxqtest:PRIMARY> db.oplogtest.insert({"id":"4"})
WriteResult({ "nInserted" : 1 })
rsmxqtest:PRIMARY> db.oplogtest.insert({"id":"5"})
WriteResult({ "nInserted" : 1 })
rsmxqtest:PRIMARY> db.oplogtest.insert({"id":"6"})
WriteResult({ "nInserted" : 1 })
rsmxqtest:PRIMARY> db.oplogtest.insert({"id":"7"})
WriteResult({ "nInserted" : 1 })
rsmxqtest:PRIMARY> db.oplogtest.insert({"id":"8"})
WriteResult({ "nInserted" : 1 })

3：备份特定时间点的日志

mongodump --port 27017 -d local -c oplog.rs -q '{ts:{$lt:Timestamp(1415928580, 1),$gt: Timestamp(1415928529, 1000)}}' -o /home/mongodb/backup/opm

从某个时间点的一个oplog

mongodump --port 27017 -d local -c oplog.rs -q '{ts:{$gt: Timestamp(1489135578, 1)}}' -o /home/mongodb/backup/opm

4：将日志导出文件

/home/maxiangqian/mongodb-linux-x86_64-rhel62-3.4.2/bin/bsondump /home/mongodb/backup/opm/local/oplog.rs.bson >optest

5：查看相关maxiangqian.oplogtest相关记录：

cat optest|grep maxiangqian.op

5：查找日志点恢复到6的记录：

时间点是：

1489135569

6：先恢复整库：

/home/maxiangqian/mongodb-linux-x86_64-rhel62-3.4.2/bin/mongorestore --port=27017 /home/mongodb/backup/bkm/

7：验证数据：

oplogtest
> db.oplogtest.find()
{ "_id" : ObjectId("58c267a24bbb77d479a0cb40"), "id" : "1" }
{ "_id" : ObjectId("58c267a54bbb77d479a0cb41"), "id" : "2" }
{ "_id" : ObjectId("58c267a84bbb77d479a0cb42"), "id" : "3" }

8：恢复oplog到时间戳1489135569

/home/maxiangqian/mongodb-linux-x86_64-rhel62-3.4.2/bin/mongorestore -h 127.0.0.1 -p 27017 --oplogReplay --oplogLimit "1489139135:1" /home/mongodb/backup/opm/local/oplog.rs.bson

9：验证数据

rsmxqtest:PRIMARY> db.oplogtest.find()
{ "_id" : ObjectId("58c275344bbb77d479a0cb48"), "id" : "1" }
{ "_id" : ObjectId("58c275384bbb77d479a0cb49"), "id" : "2" }
{ "_id" : ObjectId("58c2753b4bbb77d479a0cb4a"), "id" : "3" }
{ "_id" : ObjectId("58c275b84bbb77d479a0cb4b"), "id" : "4" }
{ "_id" : ObjectId("58c275bc4bbb77d479a0cb4c"), "id" : "5" }

试试证明，恢复到了5的时候，所以要恢复到6的话，时间点应该是7开始的时间戳