Package io.atomix.raft.impl

Class LogCompactor

java.lang.Object

io.atomix.raft.impl.LogCompactor

public final class LogCompactor
extends Object

Constructor Summary

Constructors

Constructor	Description
LogCompactor(ThreadContext threadContext, RaftLog log, int replicationThreshold, RaftServiceMetrics metrics, org.slf4j.Logger logger)

Method Summary

Modifier and Type	Method	Description
boolean	compact()	Assumes our snapshots are being taken asynchronously, and we regularly update the compactable index.
boolean	compactIgnoringReplicationThreshold()	Assumes our snapshots are being taken asynchronously, and we regularly update the compactable index.
void	setCompactableIndex(long index)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

LogCompactor

public LogCompactor(ThreadContext threadContext,
 RaftLog log,
 int replicationThreshold,
 RaftServiceMetrics metrics,
 org.slf4j.Logger logger)

Method Details

compact

public boolean compact()

Assumes our snapshots are being taken asynchronously, and we regularly update the compactable index. It can happen that nothing is compacted (e.g. there are no snapshots since the last compaction).

The log is compacted up to the latest compactable index, minus the configured replication threshold. This is done in order to avoid replicating snapshots too much, which is often times more expensive than replicating some entries.

Returns:

true if any data was deleted, false otherwise

compactIgnoringReplicationThreshold

public boolean compactIgnoringReplicationThreshold()

Assumes our snapshots are being taken asynchronously, and we regularly update the compactable index. It can happen that nothing is compacted (e.g. there are no snapshots since the last compaction).

The log is compacted up to the latest compactable index, ignoring the replication threshold.

Returns:

true if any data was deleted, false otherwise

setCompactableIndex

public void setCompactableIndex(long index)