How to control size of journals in mongodb?

问题

How to control the size of large journals files as journal file take large amount of space. How can the space can be saved using small files.

回答1:

After doing some research:

Setting smallfiles option for controlling journaling doesn't control the size

However the command is --smallfiles

回答2:

Here are some ways to control journal file size,

1. Use --smallfiles option in mongod which will use 128MB as max size of journal file instead of 1GB

2. ulimit is way in unix to control system settings. It will allow you to set max. file size in system. Consider this when you have sharding in place.

3. Reduce commitIntervalMs to a lower value i.e flush data to disk frequently. Use this option only when you can tolerate heavy IO load periodically.

来源：https://stackoverflow.com/questions/29632566/how-to-control-size-of-journals-in-mongodb