Flume Study (IV)---channel

Definition: Channels is the repositories where the events is staged on a agent. Source adds the events and Sink removes it.

According to the Flume 1.8.0 User guide provided by Flume official website, the main content of this paper is to summarize the Schannel of flume1.8.0 support, see the table below.

Channel type	Type	Storage media	Description
Memory Channel	Memory	Memory	Events are stored in memory
JDBC Channel	Jdbc	Database	Events is persisted to the database
Kafka Channel	Org.apache.flume.channel.kafka.KafkaChannel	Kafka Cluster	The events is stored in a Kafka cluster
File Channel	File	A file on a local disk	If there is no configuration file path, the default path is used. However, if you have two or more file channel two or more, you will need to specify at least one path, or a conflict may occur.
Spillable Memory Channel (experimental)	Spillablememory	An in-memory queue and on disk	Prioritize storing data to memory when memory overflows and stored on disk
Pseudo Transaction Channel	Org.apache.flume.channel.PseudoTxnMemoryChannel		Only for unit tests
Custom Channel	Custom FQCN

Flume Study (IV)---channel