alluxio.master.lineage.checkpoint

Interface CheckpointPlanner

All Known Implementing Classes:

CheckpointLatestPlanner

public interface CheckpointPlanner

Generates plans for lineage checkpointing.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	CheckpointPlanner.Factory Factory for CheckpointPlanner.

Method Summary

Modifier and Type	Method and Description
CheckpointPlan	generatePlan(LineageStoreView lineageStoreView, FileSystemMasterView fileSystemMasterView) Generates a plan to decide what lineages to checkpoint.

Method Detail

generatePlan

CheckpointPlan generatePlan(LineageStoreView lineageStoreView,
                            FileSystemMasterView fileSystemMasterView)

Generates a plan to decide what lineages to checkpoint.

This method returns null if the planner fails to propose a feasible plan to find the lineages to checkpoint. If the checkpoint plan has no lineages, it indicates that the planner has no actions to take and the requirement is already met.

Parameters:

lineageStoreView - a readonly view of the lineage store

fileSystemMasterView - a readonly view of the file system master

Returns:

a plan (possibly empty) to checkpoint the lineages, or null if no plan is feasible