You are now ready to startup MongoDB.

您现在已经准备好启动 MongoDB。

MongoDB indexes are quite similar to relational databases indexes.

MongoDB 索引与关系数据库中的索引十分相似。

MongoDB is an example of a NoSQL database. Unlike a relational database such as SQL Server, the basic unit of data in MongoDB is the document.

MongoDB是一种 NoSQL数据库，不同于SQLServer这样的关系型数据库，MongoDB中数据的基本单位是文档。

Read Reflections on MongoDB to learn how Collective Idea has made the switch.

阅读 MongoDB 思考，了解业界观念如何转变。

A good example (which is also given in MongoDB documentation) is blog posts and comments.

一个好的示例（可在 MongoDB 文档中找到）是博客文章和评论。

When I started with MongoDB I also was thinking that it is overhead to save data in documents and probably same data in multiple places.

当我开始用我也认为它是架空在文件保存数据在多个地方，可能是相同的数据。

If you need to perform advanced aggregation or use large data sets, MongoDB also includes an implementation of map/reduce, which will allow you to do so.

如果需要执行高级聚合或使用大型数据集，MongoDB 还包含一个 map/reduce 实现，让您能够完成这一任务。

In MongoDB, a blog post could be represented as a single document, with the comments and votes contained as arrays of documents within the main post document.

在MongoDB中，能用一个文档来表示一篇博客，评论与投票作为文档数组，放在正文主文档中。