Flume is a distributed, reliable system. It can efficiently collect and integrate data, and can also move large amounts of data from different sources to data centers for storage. Flume is a top-level project under Apache. Flume can not only collect and integrate log data, because the data source can be customized, Flume can be used to transmit large amounts of log data, which includes not only network transmission data, data generated by social media, email information, etc.