Package org.apache.hadoop.hdfs.server.namenode.snapshot

Class FSImageFormatPBSnapshot.Saver

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.snapshot.FSImageFormatPBSnapshot.Saver

Enclosing class:

FSImageFormatPBSnapshot

public static final class FSImageFormatPBSnapshot.Saver
extends Object

Saving snapshot related information to protobuf based FSImage

Constructor Summary

Constructors

Constructor	Description
Saver(FSImageFormatProtobuf.Saver parent, FsImageProto.FileSummary.Builder headers, SaveNamespaceContext context, FSNamesystem fsn)

Method Summary

Modifier and Type	Method	Description
long	getNumImageErrors()	Number of non-fatal errors detected while writing the SnapshotDiff and INodeReference sections.
void	serializeINodeReferenceSection(OutputStream out)	This can only be called after serializing both INode_Dir and SnapshotDiff
void	serializeSnapshotDiffSection(OutputStream out)	save all the snapshot diff to fsimage
void	serializeSnapshotSection(OutputStream out)	save all the snapshottable directories and snapshots to fsimage

Methods inherited from class java.lang.Object

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

Constructor Details

Saver

public Saver(FSImageFormatProtobuf.Saver parent,
 FsImageProto.FileSummary.Builder headers,
 SaveNamespaceContext context,
 FSNamesystem fsn)

Method Details

serializeSnapshotSection

public void serializeSnapshotSection(OutputStream out)
                              throws IOException

save all the snapshottable directories and snapshots to fsimage

Throws:

IOException

serializeINodeReferenceSection

public void serializeINodeReferenceSection(OutputStream out)
                                    throws IOException

This can only be called after serializing both INode_Dir and SnapshotDiff

Throws:

IOException

serializeSnapshotDiffSection

public void serializeSnapshotDiffSection(OutputStream out)
                                  throws IOException

save all the snapshot diff to fsimage

Throws:

IOException

getNumImageErrors

public long getNumImageErrors()

Number of non-fatal errors detected while writing the SnapshotDiff and INodeReference sections.

Returns:

the number of non-fatal errors detected.