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Description: Java面试整理，涵盖基础、JVM、线程并发、框架、MySQL、微服务、Redis、中间件、数据结构与算法等。陆续完善中 - JavaInterview/interviewDoc/Java/database/MongoDB.md at master · alphasu/JavaInterview

Open Graph Description: Java面试整理，涵盖基础、JVM、线程并发、框架、MySQL、微服务、Redis、中间件、数据结构与算法等。陆续完善中 - alphasu/JavaInterview

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Mongodb是什么？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%98%AF%E4%BB%80%E4%B9%88
Mongodb有哪些特点？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%9C%89%E5%93%AA%E4%BA%9B%E7%89%B9%E7%82%B9
什么是非关系型数据库https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AF%E9%9D%9E%E5%85%B3%E7%B3%BB%E5%9E%8B%E6%95%B0%E6%8D%AE%E5%BA%93
非关系型数据库有哪些类型https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E9%9D%9E%E5%85%B3%E7%B3%BB%E5%9E%8B%E6%95%B0%E6%8D%AE%E5%BA%93%E6%9C%89%E5%93%AA%E4%BA%9B%E7%B1%BB%E5%9E%8B
Mongodb的结构介绍https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E7%9A%84%E7%BB%93%E6%9E%84%E4%BB%8B%E7%BB%8D
MongoDB成为最好NoSQL数据库的原因是什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%88%90%E4%B8%BA%E6%9C%80%E5%A5%BDnosql%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E5%8E%9F%E5%9B%A0%E6%98%AF%E4%BB%80%E4%B9%88
MongoDB的优势有哪些https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E7%9A%84%E4%BC%98%E5%8A%BF%E6%9C%89%E5%93%AA%E4%BA%9B
MySQL与MongoDB之间最基本的差别是什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mysql%E4%B8%8Emongodb%E4%B9%8B%E9%97%B4%E6%9C%80%E5%9F%BA%E6%9C%AC%E7%9A%84%E5%B7%AE%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88
什么是集合https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AF%E9%9B%86%E5%90%88
什么是文档https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AF%E6%96%87%E6%A1%A3
什么是NoSQL数据库?NoSQL与RDBMS直接有什么区别?为什么要使用和不使用NoSQL数据库?说一说NoSQL数据库的几个优点?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AFnosql%E6%95%B0%E6%8D%AE%E5%BA%93nosql%E4%B8%8Erdbms%E7%9B%B4%E6%8E%A5%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E4%BD%BF%E7%94%A8%E5%92%8C%E4%B8%8D%E4%BD%BF%E7%94%A8nosql%E6%95%B0%E6%8D%AE%E5%BA%93%E8%AF%B4%E4%B8%80%E8%AF%B4nosql%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E5%87%A0%E4%B8%AA%E4%BC%98%E7%82%B9
NoSQL数据库有哪些类型?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#nosql%E6%95%B0%E6%8D%AE%E5%BA%93%E6%9C%89%E5%93%AA%E4%BA%9B%E7%B1%BB%E5%9E%8B
分析器在MongoDB中的作用是什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%88%86%E6%9E%90%E5%99%A8%E5%9C%A8mongodb%E4%B8%AD%E7%9A%84%E4%BD%9C%E7%94%A8%E6%98%AF%E4%BB%80%E4%B9%88
MySQL与MongoDB之间最基本的差别是什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mysql%E4%B8%8Emongodb%E4%B9%8B%E9%97%B4%E6%9C%80%E5%9F%BA%E6%9C%AC%E7%9A%84%E5%B7%AE%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88
你怎么比较MongoDB、CouchDB及CouchBase?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BD%A0%E6%80%8E%E4%B9%88%E6%AF%94%E8%BE%83mongodbcouchdb%E5%8F%8Acouchbase
MongoDB成为最好NoSQL数据库的原因是什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%88%90%E4%B8%BA%E6%9C%80%E5%A5%BDnosql%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E5%8E%9F%E5%9B%A0%E6%98%AF%E4%BB%80%E4%B9%88
"ObjectID"有哪些部分组成https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#objectid%E6%9C%89%E5%93%AA%E4%BA%9B%E9%83%A8%E5%88%86%E7%BB%84%E6%88%90
如何使用"AND"或"OR"条件循环查询集合中的文档https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E4%BD%BF%E7%94%A8and%E6%88%96or%E6%9D%A1%E4%BB%B6%E5%BE%AA%E7%8E%AF%E6%9F%A5%E8%AF%A2%E9%9B%86%E5%90%88%E4%B8%AD%E7%9A%84%E6%96%87%E6%A1%A3
在MongoDB中如何排序？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E6%8E%92%E5%BA%8F
如何执行事务/加锁?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E6%89%A7%E8%A1%8C%E4%BA%8B%E5%8A%A1%E5%8A%A0%E9%94%81
journal回放在条目(entry)不完整时(比如恰巧有一个中途故障了)会遇到问题吗?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#journal%E5%9B%9E%E6%94%BE%E5%9C%A8%E6%9D%A1%E7%9B%AEentry%E4%B8%8D%E5%AE%8C%E6%95%B4%E6%97%B6%E6%AF%94%E5%A6%82%E6%81%B0%E5%B7%A7%E6%9C%89%E4%B8%80%E4%B8%AA%E4%B8%AD%E9%80%94%E6%95%85%E9%9A%9C%E4%BA%86%E4%BC%9A%E9%81%87%E5%88%B0%E9%97%AE%E9%A2%98%E5%90%97
分析器在MongoDB中的作用是什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%88%86%E6%9E%90%E5%99%A8%E5%9C%A8mongodb%E4%B8%AD%E7%9A%84%E4%BD%9C%E7%94%A8%E6%98%AF%E4%BB%80%E4%B9%88
如果用户移除对象的属性，该属性是否从存储层中删除?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E6%9E%9C%E7%94%A8%E6%88%B7%E7%A7%BB%E9%99%A4%E5%AF%B9%E8%B1%A1%E7%9A%84%E5%B1%9E%E6%80%A7%E8%AF%A5%E5%B1%9E%E6%80%A7%E6%98%AF%E5%90%A6%E4%BB%8E%E5%AD%98%E5%82%A8%E5%B1%82%E4%B8%AD%E5%88%A0%E9%99%A4
能否使用日志特征进行安全备份?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E8%83%BD%E5%90%A6%E4%BD%BF%E7%94%A8%E6%97%A5%E5%BF%97%E7%89%B9%E5%BE%81%E8%BF%9B%E8%A1%8C%E5%AE%89%E5%85%A8%E5%A4%87%E4%BB%BD
允许空值null吗?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%85%81%E8%AE%B8%E7%A9%BA%E5%80%BCnull%E5%90%97
MongoDB更新操作立刻fsync到磁盘?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%9B%B4%E6%96%B0%E6%93%8D%E4%BD%9C%E7%AB%8B%E5%88%BBfsync%E5%88%B0%E7%A3%81%E7%9B%98
如何执行事务/加锁?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E6%89%A7%E8%A1%8C%E4%BA%8B%E5%8A%A1%E5%8A%A0%E9%94%81
为什么我的数据文件如此庞大?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%B8%BA%E4%BB%80%E4%B9%88%E6%88%91%E7%9A%84%E6%95%B0%E6%8D%AE%E6%96%87%E4%BB%B6%E5%A6%82%E6%AD%A4%E5%BA%9E%E5%A4%A7
启用备份故障恢复需要多久?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%90%AF%E7%94%A8%E5%A4%87%E4%BB%BD%E6%95%85%E9%9A%9C%E6%81%A2%E5%A4%8D%E9%9C%80%E8%A6%81%E5%A4%9A%E4%B9%85
什么是master或primary?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AFmaster%E6%88%96primary
什么是secondary或slave?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AFsecondary%E6%88%96slave
必须调用getLastError来确保写操作生效了么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%BF%85%E9%A1%BB%E8%B0%83%E7%94%A8getlasterror%E6%9D%A5%E7%A1%AE%E4%BF%9D%E5%86%99%E6%93%8D%E4%BD%9C%E7%94%9F%E6%95%88%E4%BA%86%E4%B9%88
MongoDB副本集选举条件有那些？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E5%89%AF%E6%9C%AC%E9%9B%86%E9%80%89%E4%B8%BE%E6%9D%A1%E4%BB%B6%E6%9C%89%E9%82%A3%E4%BA%9B
简单的描述下MongoDB选举流程https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E7%AE%80%E5%8D%95%E7%9A%84%E6%8F%8F%E8%BF%B0%E4%B8%8Bmongodb%E9%80%89%E4%B8%BE%E6%B5%81%E7%A8%8B
我应该启动一个集群分片(sharded)还是一个非集群分片的 MongoDB 环境?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E6%88%91%E5%BA%94%E8%AF%A5%E5%90%AF%E5%8A%A8%E4%B8%80%E4%B8%AA%E9%9B%86%E7%BE%A4%E5%88%86%E7%89%87sharded%E8%BF%98%E6%98%AF%E4%B8%80%E4%B8%AA%E9%9D%9E%E9%9B%86%E7%BE%A4%E5%88%86%E7%89%87%E7%9A%84-mongodb-%E7%8E%AF%E5%A2%83
什么是MongoDB分片集群?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AFmongodb%E5%88%86%E7%89%87%E9%9B%86%E7%BE%A4
Monogodb中的分片什么意思？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#monogodb%E4%B8%AD%E7%9A%84%E5%88%86%E7%89%87%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D
MongoDB中为何需要水平分片？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E4%B8%AD%E4%B8%BA%E4%BD%95%E9%9C%80%E8%A6%81%E6%B0%B4%E5%B9%B3%E5%88%86%E7%89%87
什么情况下需要用到MongoDB的分片？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E9%9C%80%E8%A6%81%E7%94%A8%E5%88%B0mongodb%E7%9A%84%E5%88%86%E7%89%87
MongoDB中分片键的意义何在？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E4%B8%AD%E5%88%86%E7%89%87%E9%94%AE%E7%9A%84%E6%84%8F%E4%B9%89%E4%BD%95%E5%9C%A8
分片(sharding)和复制(replication)是怎样工作的?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%88%86%E7%89%87sharding%E5%92%8C%E5%A4%8D%E5%88%B6replication%E6%98%AF%E6%80%8E%E6%A0%B7%E5%B7%A5%E4%BD%9C%E7%9A%84
构建一个分片集群需要用的那些角色？分别是什么？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E6%9E%84%E5%BB%BA%E4%B8%80%E4%B8%AA%E5%88%86%E7%89%87%E9%9B%86%E7%BE%A4%E9%9C%80%E8%A6%81%E7%94%A8%E7%9A%84%E9%82%A3%E4%BA%9B%E8%A7%92%E8%89%B2%E5%88%86%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88
副本集角色有那些？做是什么？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%89%AF%E6%9C%AC%E9%9B%86%E8%A7%92%E8%89%B2%E6%9C%89%E9%82%A3%E4%BA%9B%E5%81%9A%E6%98%AF%E4%BB%80%E4%B9%88
数据在什么时候才会扩展到多个分片(shard)里?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E6%95%B0%E6%8D%AE%E5%9C%A8%E4%BB%80%E4%B9%88%E6%97%B6%E5%80%99%E6%89%8D%E4%BC%9A%E6%89%A9%E5%B1%95%E5%88%B0%E5%A4%9A%E4%B8%AA%E5%88%86%E7%89%87shard%E9%87%8C
当我试图更新一个正在被迁移的块(chunk)上的文档时会发生什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%BD%93%E6%88%91%E8%AF%95%E5%9B%BE%E6%9B%B4%E6%96%B0%E4%B8%80%E4%B8%AA%E6%AD%A3%E5%9C%A8%E8%A2%AB%E8%BF%81%E7%A7%BB%E7%9A%84%E5%9D%97chunk%E4%B8%8A%E7%9A%84%E6%96%87%E6%A1%A3%E6%97%B6%E4%BC%9A%E5%8F%91%E7%94%9F%E4%BB%80%E4%B9%88
如果在一个分片(shard)停止或者很慢的时候，我发起一个查询会怎样?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E6%9E%9C%E5%9C%A8%E4%B8%80%E4%B8%AA%E5%88%86%E7%89%87shard%E5%81%9C%E6%AD%A2%E6%88%96%E8%80%85%E5%BE%88%E6%85%A2%E7%9A%84%E6%97%B6%E5%80%99%E6%88%91%E5%8F%91%E8%B5%B7%E4%B8%80%E4%B8%AA%E6%9F%A5%E8%AF%A2%E4%BC%9A%E6%80%8E%E6%A0%B7
我可以把moveChunk目录里的旧文件删除吗?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E6%88%91%E5%8F%AF%E4%BB%A5%E6%8A%8Amovechunk%E7%9B%AE%E5%BD%95%E9%87%8C%E7%9A%84%E6%97%A7%E6%96%87%E4%BB%B6%E5%88%A0%E9%99%A4%E5%90%97
怎么查看 Mongo 正在使用的链接?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E6%80%8E%E4%B9%88%E6%9F%A5%E7%9C%8B-mongo-%E6%AD%A3%E5%9C%A8%E4%BD%BF%E7%94%A8%E7%9A%84%E9%93%BE%E6%8E%A5
如果块移动操作(moveChunk)失败了，我需要手动清除部分转移的文档吗?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E6%9E%9C%E5%9D%97%E7%A7%BB%E5%8A%A8%E6%93%8D%E4%BD%9Cmovechunk%E5%A4%B1%E8%B4%A5%E4%BA%86%E6%88%91%E9%9C%80%E8%A6%81%E6%89%8B%E5%8A%A8%E6%B8%85%E9%99%A4%E9%83%A8%E5%88%86%E8%BD%AC%E7%A7%BB%E7%9A%84%E6%96%87%E6%A1%A3%E5%90%97
如果我在使用复制技术(replication)，可以一部分使用日志(journaling)而其他部分则不使用吗?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E6%9E%9C%E6%88%91%E5%9C%A8%E4%BD%BF%E7%94%A8%E5%A4%8D%E5%88%B6%E6%8A%80%E6%9C%AFreplication%E5%8F%AF%E4%BB%A5%E4%B8%80%E9%83%A8%E5%88%86%E4%BD%BF%E7%94%A8%E6%97%A5%E5%BF%97journaling%E8%80%8C%E5%85%B6%E4%BB%96%E9%83%A8%E5%88%86%E5%88%99%E4%B8%8D%E4%BD%BF%E7%94%A8%E5%90%97
MongoDB在A:{B,C}上建立索引，查询A:{B,C}和A:{C,B}都会使用索引吗？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E5%9C%A8abc%E4%B8%8A%E5%BB%BA%E7%AB%8B%E7%B4%A2%E5%BC%95%E6%9F%A5%E8%AF%A2abc%E5%92%8Cacb%E9%83%BD%E4%BC%9A%E4%BD%BF%E7%94%A8%E7%B4%A2%E5%BC%95%E5%90%97
如果一个分片（Shard）停止或很慢的时候，发起一个查询会怎样？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E6%9E%9C%E4%B8%80%E4%B8%AA%E5%88%86%E7%89%87shard%E5%81%9C%E6%AD%A2%E6%88%96%E5%BE%88%E6%85%A2%E7%9A%84%E6%97%B6%E5%80%99%E5%8F%91%E8%B5%B7%E4%B8%80%E4%B8%AA%E6%9F%A5%E8%AF%A2%E4%BC%9A%E6%80%8E%E6%A0%B7
MongoDB支持存储过程吗？如果支持的话，怎么用？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%94%AF%E6%8C%81%E5%AD%98%E5%82%A8%E8%BF%87%E7%A8%8B%E5%90%97%E5%A6%82%E6%9E%9C%E6%94%AF%E6%8C%81%E7%9A%84%E8%AF%9D%E6%80%8E%E4%B9%88%E7%94%A8
解释一下什么是MongoDB中的GridFS ?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E8%A7%A3%E9%87%8A%E4%B8%80%E4%B8%8B%E4%BB%80%E4%B9%88%E6%98%AFmongodb%E4%B8%AD%E7%9A%84gridfs-
如何理解MongoDB中的GridFS机制，MongoDB为何使用GridFS来存储文件？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E7%90%86%E8%A7%A3mongodb%E4%B8%AD%E7%9A%84gridfs%E6%9C%BA%E5%88%B6mongodb%E4%B8%BA%E4%BD%95%E4%BD%BF%E7%94%A8gridfs%E6%9D%A5%E5%AD%98%E5%82%A8%E6%96%87%E4%BB%B6
MongoDB支持存储过程吗？如果支持的话，怎么用？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%94%AF%E6%8C%81%E5%AD%98%E5%82%A8%E8%BF%87%E7%A8%8B%E5%90%97%E5%A6%82%E6%9E%9C%E6%94%AF%E6%8C%81%E7%9A%84%E8%AF%9D%E6%80%8E%E4%B9%88%E7%94%A8
如何理解MongoDB中的GridFS机制，MongoDB为何使用GridFS来存储文件？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E7%90%86%E8%A7%A3mongodb%E4%B8%AD%E7%9A%84gridfs%E6%9C%BA%E5%88%B6mongodb%E4%B8%BA%E4%BD%95%E4%BD%BF%E7%94%A8gridfs%E6%9D%A5%E5%AD%98%E5%82%A8%E6%96%87%E4%BB%B6
为什么MongoDB的数据文件很大？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%B8%BA%E4%BB%80%E4%B9%88mongodb%E7%9A%84%E6%95%B0%E6%8D%AE%E6%96%87%E4%BB%B6%E5%BE%88%E5%A4%A7
MongoDB在A:{B,C}上建立索引，查询A:{B,C}和A:{C,B}都会使用索引吗？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E5%9C%A8abc%E4%B8%8A%E5%BB%BA%E7%AB%8B%E7%B4%A2%E5%BC%95%E6%9F%A5%E8%AF%A2abc%E5%92%8Cacb%E9%83%BD%E4%BC%9A%E4%BD%BF%E7%94%A8%E7%B4%A2%E5%BC%95%E5%90%97
如果用户移除对象的属性，该属性是否从存储层中删除？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E6%9E%9C%E7%94%A8%E6%88%B7%E7%A7%BB%E9%99%A4%E5%AF%B9%E8%B1%A1%E7%9A%84%E5%B1%9E%E6%80%A7%E8%AF%A5%E5%B1%9E%E6%80%A7%E6%98%AF%E5%90%A6%E4%BB%8E%E5%AD%98%E5%82%A8%E5%B1%82%E4%B8%AD%E5%88%A0%E9%99%A4
能否使用日志特征进行安全备份？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E8%83%BD%E5%90%A6%E4%BD%BF%E7%94%A8%E6%97%A5%E5%BF%97%E7%89%B9%E5%BE%81%E8%BF%9B%E8%A1%8C%E5%AE%89%E5%85%A8%E5%A4%87%E4%BB%BD
更新操作立刻fsync到磁盘？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E6%9B%B4%E6%96%B0%E6%93%8D%E4%BD%9C%E7%AB%8B%E5%88%BBfsync%E5%88%B0%E7%A3%81%E7%9B%98
如何执行事务/加锁？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E6%89%A7%E8%A1%8C%E4%BA%8B%E5%8A%A1%E5%8A%A0%E9%94%81
什么是master或primary？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AFmaster%E6%88%96primary
getLastError的作用https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#getlasterror%E7%9A%84%E4%BD%9C%E7%94%A8
分片（sharding）和复制（replication）是怎样工作的？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%88%86%E7%89%87sharding%E5%92%8C%E5%A4%8D%E5%88%B6replication%E6%98%AF%E6%80%8E%E6%A0%B7%E5%B7%A5%E4%BD%9C%E7%9A%84
数据在什么时候才会扩展到多个分片（shard）里？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E6%95%B0%E6%8D%AE%E5%9C%A8%E4%BB%80%E4%B9%88%E6%97%B6%E5%80%99%E6%89%8D%E4%BC%9A%E6%89%A9%E5%B1%95%E5%88%B0%E5%A4%9A%E4%B8%AA%E5%88%86%E7%89%87shard%E9%87%8C
什么是”mongod“https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AFmongod
"mongod"参数有什么https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongod%E5%8F%82%E6%95%B0%E6%9C%89%E4%BB%80%E4%B9%88
什么是"mongo"https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AFmongo
MongoDB哪个命令可以切换数据库https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E5%93%AA%E4%B8%AA%E5%91%BD%E4%BB%A4%E5%8F%AF%E4%BB%A5%E5%88%87%E6%8D%A2%E6%95%B0%E6%8D%AE%E5%BA%93
为什么用MOngoDB？https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%B8%BA%E4%BB%80%E4%B9%88%E7%94%A8mongodb
MongoDB适合应用在那些场景?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E9%80%82%E5%90%88%E5%BA%94%E7%94%A8%E5%9C%A8%E9%82%A3%E4%BA%9B%E5%9C%BA%E6%99%AF
在哪些场景使用MongoDBhttps://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8%E5%93%AA%E4%BA%9B%E5%9C%BA%E6%99%AF%E4%BD%BF%E7%94%A8mongodb
MongoDB中的命名空间是什么意思?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E4%B8%AD%E7%9A%84%E5%91%BD%E5%90%8D%E7%A9%BA%E9%97%B4%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D
哪些语言支持MongoDB?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%93%AA%E4%BA%9B%E8%AF%AD%E8%A8%80%E6%94%AF%E6%8C%81mongodb
在MongoDB中如何创建一个新的数据库https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E5%88%9B%E5%BB%BA%E4%B8%80%E4%B8%AA%E6%96%B0%E7%9A%84%E6%95%B0%E6%8D%AE%E5%BA%93
在MongoDB中如何查看数据库列表https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8B%E6%95%B0%E6%8D%AE%E5%BA%93%E5%88%97%E8%A1%A8
MongoDB中的分片是什么意思https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E4%B8%AD%E7%9A%84%E5%88%86%E7%89%87%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D
如何查看使用MongoDB的连接Sharding - MongoDB Manual21.如何查看使用MongoDB的连接https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8B%E4%BD%BF%E7%94%A8mongodb%E7%9A%84%E8%BF%9E%E6%8E%A5sharding---mongodb-manual21%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8B%E4%BD%BF%E7%94%A8mongodb%E7%9A%84%E8%BF%9E%E6%8E%A5
什么是复制https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AF%E5%A4%8D%E5%88%B6
在MongoDB中如何在集合中插入一个文档https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E5%9C%A8%E9%9B%86%E5%90%88%E4%B8%AD%E6%8F%92%E5%85%A5%E4%B8%80%E4%B8%AA%E6%96%87%E6%A1%A3
在MongoDB中如何除去一个数据库Collection Methods24.在MongoDB中如何除去一个数据库https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E9%99%A4%E5%8E%BB%E4%B8%80%E4%B8%AA%E6%95%B0%E6%8D%AE%E5%BA%93collection-methods24%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E9%99%A4%E5%8E%BB%E4%B8%80%E4%B8%AA%E6%95%B0%E6%8D%AE%E5%BA%93
在MongoDB中如何查看一个已经创建的集合https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8B%E4%B8%80%E4%B8%AA%E5%B7%B2%E7%BB%8F%E5%88%9B%E5%BB%BA%E7%9A%84%E9%9B%86%E5%90%88
在MongoDB中如何删除一个集合https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E5%88%A0%E9%99%A4%E4%B8%80%E4%B8%AA%E9%9B%86%E5%90%88
为什么要在MongoDB中使用分析器https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E5%9C%A8mongodb%E4%B8%AD%E4%BD%BF%E7%94%A8%E5%88%86%E6%9E%90%E5%99%A8
分析器在MongoDB中的作用是什么?https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%88%86%E6%9E%90%E5%99%A8%E5%9C%A8mongodb%E4%B8%AD%E7%9A%84%E4%BD%9C%E7%94%A8%E6%98%AF%E4%BB%80%E4%B9%88
MongoDB支持主键外键关系吗https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%94%AF%E6%8C%81%E4%B8%BB%E9%94%AE%E5%A4%96%E9%94%AE%E5%85%B3%E7%B3%BB%E5%90%97
MongoDB支持哪些数据类型https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb%E6%94%AF%E6%8C%81%E5%93%AA%E4%BA%9B%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B
为什么要在MongoDB中用"Code"数据类型https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E5%9C%A8mongodb%E4%B8%AD%E7%94%A8code%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B
为什么要在MongoDB中用"Regular Expression"数据类型https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E5%9C%A8mongodb%E4%B8%AD%E7%94%A8regular-expression%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B
为什么在MongoDB中使用"Object ID"数据类型https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%B8%BA%E4%BB%80%E4%B9%88%E5%9C%A8mongodb%E4%B8%AD%E4%BD%BF%E7%94%A8object-id%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B
"ObjectID"由哪些部分组成https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#objectid%E7%94%B1%E5%93%AA%E4%BA%9B%E9%83%A8%E5%88%86%E7%BB%84%E6%88%90
在MongoDb中什么是索引https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E4%BB%80%E4%B9%88%E6%98%AF%E7%B4%A2%E5%BC%95
如何添加索引https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E6%B7%BB%E5%8A%A0%E7%B4%A2%E5%BC%95
用什么方法可以格式化输出结果https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E7%94%A8%E4%BB%80%E4%B9%88%E6%96%B9%E6%B3%95%E5%8F%AF%E4%BB%A5%E6%A0%BC%E5%BC%8F%E5%8C%96%E8%BE%93%E5%87%BA%E7%BB%93%E6%9E%9C
如何使用"AND"或"OR"条件循环查询集合中的文档https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E4%BD%BF%E7%94%A8and%E6%88%96or%E6%9D%A1%E4%BB%B6%E5%BE%AA%E7%8E%AF%E6%9F%A5%E8%AF%A2%E9%9B%86%E5%90%88%E4%B8%AD%E7%9A%84%E6%96%87%E6%A1%A3
在MongoDB中如何更新数据https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E6%9B%B4%E6%96%B0%E6%95%B0%E6%8D%AE
如何删除文档https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%A6%82%E4%BD%95%E5%88%A0%E9%99%A4%E6%96%87%E6%A1%A3
在MongoDB中如何排序https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E5%A6%82%E4%BD%95%E6%8E%92%E5%BA%8F
什么是聚合https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E4%BB%80%E4%B9%88%E6%98%AF%E8%81%9A%E5%90%88
在MongoDB中什么是副本集https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#%E5%9C%A8mongodb%E4%B8%AD%E4%BB%80%E4%B9%88%E6%98%AF%E5%89%AF%E6%9C%AC%E9%9B%86
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https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#如果在一个分片shard停止或者很慢的时候我发起一个查询会怎样
https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#我可以把movechunk目录里的旧文件删除吗
https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#怎么查看-mongo-正在使用的链接
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https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#如果我在使用复制技术replication可以一部分使用日志journaling而其他部分则不使用吗
https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#mongodb在abc上建立索引查询abc和acb都会使用索引吗
https://github.com/alphasu/JavaInterview/blob/master/interviewDoc/Java/database/MongoDB.md#如果一个分片shard停止或很慢的时候发起一个查询会怎样
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