Package org.apache.hadoop.fs

Interface Syncable

All Known Implementing Classes:

BufferedIOStatisticsOutputStream, CryptoFSDataOutputStream, CryptoOutputStream, FSDataOutputStream, SequenceFile.Writer

@Public
@Stable
public interface Syncable

This is the interface for flush/sync operations. Consult the Hadoop filesystem specification for the definition of the semantics of these operations.

Method Summary

Modifier and Type	Method	Description
void	hflush()	Flush out the data in client's user buffer.
void	hsync()	Similar to posix fsync, flush out the data in client's user buffer all the way to the disk device (but the disk may have it in its cache).
void	sync()	Deprecated. As of HADOOP 0.21.0, replaced by hflush

Method Detail

sync

@Deprecated
void sync()
   throws java.io.IOException

Deprecated.

As of HADOOP 0.21.0, replaced by hflush

Throws:

java.io.IOException

See Also:

hflush()

hflush

void hflush()
     throws java.io.IOException

Flush out the data in client's user buffer. After the return of this call, new readers will see the data.

Throws:

java.io.IOException - if any error occurs

hsync

void hsync()
    throws java.io.IOException

Similar to posix fsync, flush out the data in client's user buffer all the way to the disk device (but the disk may have it in its cache).

Throws:

java.io.IOException - if error occurs