org.apache.ignite.internal.processors.cache.persistence.file

Class AlignedBuffersDirectFileIOFactory

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.file.AlignedBuffersDirectFileIOFactory

All Implemented Interfaces:

Serializable, FileIOFactory

public class AlignedBuffersDirectFileIOFactory
extends Object
implements FileIOFactory

Direct native IO factory for block IO operations on aligned memory structures.
This limited functionality is used for page store operations.
Note: This type of IO not applicable for WAL or other files.

This IO tries to minimize cache effects of the I/O (page caching by OS).

In general this will degrade performance, but it is useful in special situations, such as when applications do their own caching.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AlignedBuffersDirectFileIOFactory(IgniteLogger log, File storePath, int pageSize, FileIOFactory backupFactory) Creates direct native IO factory.

Method Summary

Modifier and Type	Method and Description
FileIO	create(File file, OpenOption... modes)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ignite.internal.processors.cache.persistence.file.FileIOFactory

create

Constructor Detail

AlignedBuffersDirectFileIOFactory

public AlignedBuffersDirectFileIOFactory(IgniteLogger log,
                                         File storePath,
                                         int pageSize,
                                         FileIOFactory backupFactory)

Creates direct native IO factory.

Parameters:

log - Logger.

storePath - Storage path, used to check FS settings.

pageSize - durable memory page size.

backupFactory - fallback factory if init failed.

Method Detail

create

public FileIO create(File file,
                     OpenOption... modes)
              throws IOException

Specified by:

create in interface FileIOFactory

Throws:

IOException