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[英]Writing a sequence file from an image in local to HDFS using Java and Spark
[英]Java Load sequence file from hdfs as JavaRDD<Vector>
我有以下方法将文件写入HDFS
public void writePointsToFile(Path path, FileSystem fs, Configuration conf,
List<Vector> points) throws IOException {
SequenceFile.Writer writer = SequenceFile.createWriter(conf,
Writer.file(path), Writer.keyClass(LongWritable.class),
Writer.valueClass(Vector.class));
long recNum = 0;
for (Vector point : points) {
writer.append(new LongWritable(recNum++), point);
}
writer.close();
}
我需要知道如何以JavaRDD<Vector>
读取此文件以在Spark Clustering K-mean
?
Spark的典型模式是将不可变的对象转换为新的对象,因此转换DRM(Mahout分布式行矩阵)或Mahout Vectors集合是您应该这样做的方式。 所以不确定您要问什么。
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