water.persist

Class PersistHdfsTask

java.lang.Object

jsr166y.ForkJoinTask<java.lang.Void>

jsr166y.CountedCompleter

water.H2O.H2OCountedCompleter

water.DTask<PersistHdfsTask>

water.persist.PersistHdfsTask

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.concurrent.Future<java.lang.Void>, Freezable

public class PersistHdfsTask
extends DTask<PersistHdfsTask>

Distributed task to store key on HDFS. If it is a simple value, it is simply stored on hdfs. For arraylets, chunks are stored in order by their home nodes. Each node continues storing chunks until the next to be stored has different home in which case the task is passed to the home node of that chunk.

See Also:

Serialized Form

Field Summary

Fields inherited from class water.DTask

_cls, _eFromNode, _exception, _fname, _lineNum, _msg, _mth

Constructor Summary

Constructors

Constructor and Description
PersistHdfsTask()

Method Summary

Methods

Modifier and Type	Method and Description
void	compute2()
static java.lang.String	store2Hdfs(java.lang.String path, Key key)

Methods inherited from class water.DTask

copyOver, dinvoke, frozenType, getDException, hasException, logVerbose, newInstance, onAck, onAckAck, onExceptionalCompletion, read, setException, toDocField, write, writeJSONFields

Methods inherited from class water.H2O.H2OCountedCompleter

clone, compute, priority

Methods inherited from class jsr166y.CountedCompleter

addToPendingCount, compareAndSetPendingCount, complete, exec, getCompleter, getPendingCount, getRawResult, onCompletion, setCompleter, setPendingCount, setRawResult, tryComplete

Methods inherited from class jsr166y.ForkJoinTask

adapt, adapt, adapt, cancel, compareAndSetForkJoinTaskTag, completeExceptionally, fork, get, get, getException, getForkJoinTaskTag, getPool, getQueuedTaskCount, getSurplusQueuedTaskCount, helpQuiesce, inForkJoinPool, invoke, invokeAll, invokeAll, invokeAll, isCancelled, isCompletedAbnormally, isCompletedNormally, isDone, join, peekNextLocalTask, pollNextLocalTask, pollTask, quietlyComplete, quietlyInvoke, quietlyJoin, reinitialize, setForkJoinTaskTag, tryUnfork

Methods inherited from class java.lang.Object

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

Constructor Detail

PersistHdfsTask

public PersistHdfsTask()

Method Detail

store2Hdfs

public static java.lang.String store2Hdfs(java.lang.String path,
                          Key key)

compute2

public void compute2()

Specified by:

compute2 in class H2O.H2OCountedCompleter