Message storage is the most complicated and important part of RocketMQ. This section will describe the three aspects of RocketMQ: message storage architecture, PageCache and memory mapping, and RocketMQ's two different disk flushing methods.
## 1. Message Storage Architecture
## 1 Message Storage Architecture
The message storage architecture diagram consists of 3 files related to message storage: `CommitLog` file, `ConsumeQueue` file, and `IndexFile`.
