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At its core, Hudi maintains a timeline of all actions def~instant-action performed on the def~table at different instants of time that helps provide instantaneous views of the def~table, while also efficiently supporting retrieval of data in the order of arrival. A Hudi `timeline instant` consists of the following components

• def~instant-action-type: Type of action performed on the def~table
• def~instant-time: typically a timestamp (e.g: 20190117010349), which monotonically increases in the order of action’s begin time.
• instant state: current state of the 135861679