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MongoDB 1.2.x发布笔记

MongoDB 1.2.x发布笔记¶

新特性¶

每个集合更多索引
更快的索引创建
Map Reduce
存储的JavaScript 函数
可配置的文件并行时间
一些新功能和修改

数据库升级需要¶

There are some changes that will require doing an upgrade if your previous version is <= 1.0.x. If you’re already using a version >= 1.1.x then these changes aren’t required. There are 2 ways to do it:

--upgrade
- stop your mongod process
- run ./mongod --upgrade
- start mongod again
使用一个slave
- start a slave on a different port and data directory
- when its synced, shut down the master, and start the new slave on the regular port.

Ask in the forums or IRC for more help.

Replication Changes¶

There have been minor changes in replication. If you are upgrading a master/slave setup from <= 1.1.2 you have to update the slave first.

mongoimport¶

mongoimportjson has been removed and is replaced with mongoimport that can do json/csv/tsv

field filter changing¶

We’ve changed the semantics of the field filter a little bit. Previously only objects with those fields would be returned. Now the field filter only changes the output, not which objects are returned. If you need that behavior, you can use $exists

← MongoDB 1.4发布笔记 Default Write Concern Change →