本文整理汇总了Java中org.apache.hadoop.mapred.Task.CombineValuesIterator类的典型用法代码示例。如果您正苦于以下问题:Java CombineValuesIterator类的具体用法?Java CombineValuesIterator怎么用?Java CombineValuesIterator使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
CombineValuesIterator类属于org.apache.hadoop.mapred.Task包,在下文中一共展示了CombineValuesIterator类的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的Java代码示例。
示例1: combineAndSpill
import org.apache.hadoop.mapred.Task.CombineValuesIterator; //导入依赖的package包/类
private void combineAndSpill(
RawKeyValueIterator kvIter,
Counters.Counter inCounter) throws IOException {
JobConf job = jobConf;
Reducer combiner = ReflectionUtils.newInstance(combinerClass, job);
Class<K> keyClass = (Class<K>) job.getMapOutputKeyClass();
Class<V> valClass = (Class<V>) job.getMapOutputValueClass();
RawComparator<K> comparator =
(RawComparator<K>)job.getCombinerKeyGroupingComparator();
try {
CombineValuesIterator values = new CombineValuesIterator(
kvIter, comparator, keyClass, valClass, job, Reporter.NULL,
inCounter);
while (values.more()) {
combiner.reduce(values.getKey(), values, combineCollector,
Reporter.NULL);
values.nextKey();
}
} finally {
combiner.close();
}
}
开发者ID:aliyun-beta,项目名称:aliyun-oss-hadoop-fs,代码行数:23,代码来源:MergeManagerImpl.java
示例2: combineAndSpill
import org.apache.hadoop.mapred.Task.CombineValuesIterator; //导入依赖的package包/类
private void combineAndSpill(
RawKeyValueIterator kvIter,
Counters.Counter inCounter) throws IOException {
JobConf job = jobConf;
Reducer combiner = ReflectionUtils.newInstance(combinerClass, job);
Class<K> keyClass = (Class<K>) job.getMapOutputKeyClass();
Class<V> valClass = (Class<V>) job.getMapOutputValueClass();
RawComparator<K> comparator =
(RawComparator<K>)job.getOutputKeyComparator();
try {
CombineValuesIterator values = new CombineValuesIterator(
kvIter, comparator, keyClass, valClass, job, Reporter.NULL,
inCounter);
while (values.more()) {
combiner.reduce(values.getKey(), values, combineCollector,
Reporter.NULL);
values.nextKey();
}
} finally {
combiner.close();
}
}
开发者ID:ict-carch,项目名称:hadoop-plus,代码行数:23,代码来源:MergeManagerImpl.java
注:本文中的org.apache.hadoop.mapred.Task.CombineValuesIterator类示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。 |
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