Mongodb 3.0 configuration

Mongodb 3.0 is a revolutionary version, thanks to the new version of the storage engine WiredTiger, which greatly improves performance as well as data compression (300%).

For performance comparison, see: https://comerford.cc/2015/02/04/mongodb-3-0-testing-compression/

Installation documentation: https://docs.mongodb.org/manual/administration/install-on-linux/

If you just install mongodb and start it, I'm sorry, it's still slow, and the default storage engine is still the old MMAPV1.

The default configuration of etc/mongo.conf is really commonplace, it is actually a text in yaml format, please replace it with the following configuration, you can change shotguns immediately.

SystemLog:

Destination: file

Path: / var/log/mongodb/mongod.log

LogAppend: true

ProcessManagement:

Fork: true

PidFilePath: / var/run/mongodb/mongod.pid

Net:

BindIp: 127.0.0.1

Port: 27017

Storage:

Journal:

Enabled: true

DbPath: / var/lib/mongo

DirectoryPerDB: true

SyncPeriodSecs: 60

Engine: wiredTiger

WiredTiger:

EngineConfig:

CacheSizeGB: 1

DirectoryForIndexes: false

JournalCompressor: snappy

CollectionConfig:

BlockCompressor: snappy

IndexConfig:

PrefixCompression: true

It is particularly important to note that yaml files do not support tab tabs, so pay special attention to paragraph file alignment, otherwise mongodb will fail to start.

Update 2016-04-16

The default storage engine of mongodb 3.2 has been changed to WiredTiger. It is recommended to use mongodb 3.2 directly.