摘要：/** Splits files returned by {@link #listStatus(JobConf)} when * they're too big.*/ public InputSplit[] getSplits(JobConf job, int numSplits) throws IOException { //计时器， StopWatch ... 阅读全文

摘要：/** * * @param job 配置信息 * @param split split * @param recordDelimiter 分列的字符 * @throws IOException */ public LineRecordReader(Configuration job, FileSplit split, byte[] r... 阅读全文

摘要：/** A section of an input file. Returned by {@link * InputFormat#getSplits(JobContext)} and passed to * {@link InputFormat#createRecordReader(InputSplit,TaskAttemptContext)}. * * 文件的一部分，通过InputForm... 阅读全文

摘要：/** * InputSplit represents the data to be processed by an * individual {@link Mapper}. * InputSplit 代表可以被Mapper处理的数据 * Typically, it presents a byte-oriented view on the input and is the * r... 阅读全文

摘要：/** * Basic hash bin node, used for most entries. (See below for * TreeNode subclass, and in LinkedHashMap for its Entry subclass.) */ static class Node implements Map.Entry { ... 阅读全文

摘要：/* * Implementation notes. * 使用说明 * * This map usually acts as a binned (bucketed) hash table, but * when bins get too large, they are transformed into bins of * Tre... 阅读全文