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HBASE-20386 [DOC] Align WALPlayer help text and refguide

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Balazs Meszaros 2018-04-11 09:59:12 +02:00 committed by Michael Stack
parent cc801f5f2d
commit d0060394bf
1 changed files with 16 additions and 13 deletions
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29
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/WALPlayer.java
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@ -383,26 +383,29 @@ public class WALPlayer extends Configured implements Tool {
System.err.println("ERROR: " + errorMsg); System.err.println("ERROR: " + errorMsg);
} }
System.err.println("Usage: " + NAME + " [options] <wal inputdir> <tables> [<tableMappings>]"); System.err.println("Usage: " + NAME + " [options] <wal inputdir> <tables> [<tableMappings>]");
System.err.println("Read all WAL entries for <tables>."); System.err.println("Replay all WAL files into HBase.");
System.err.println("If no tables (\"\") are specific, all tables are imported."); System.err.println("<tables> is a comma separated list of tables.");
System.err.println("(Careful, even hbase:meta entries will be imported"+ System.err.println("If no tables (\"\") are specified, all tables are imported.");
" in that case.)"); System.err.println("(Be careful, hbase:meta entries will be imported in this case.)\n");
System.err.println("Otherwise <tables> is a comma separated list of tables.\n"); System.err.println("WAL entries can be mapped to new set of tables via <tableMappings>.");
System.err.println("The WAL entries can be mapped to new set of tables via <tableMapping>."); System.err.println("<tableMappings> is a comma separated list of target tables.");
System.err.println("<tableMapping> is a command separated list of targettables.");
System.err.println("If specified, each table in <tables> must have a mapping.\n"); System.err.println("If specified, each table in <tables> must have a mapping.\n");
System.err.println("By default " + NAME + " will load data directly into HBase."); System.err.println("By default " + NAME + " will load data directly into HBase.");
System.err.println("To generate HFiles for a bulk data load instead, pass the option:"); System.err.println("To generate HFiles for a bulk data load instead, pass the following option:");
System.err.println(" -D" + BULK_OUTPUT_CONF_KEY + "=/path/for/output"); System.err.println(" -D" + BULK_OUTPUT_CONF_KEY + "=/path/for/output");
System.err.println(" (Only one table can be specified, and no mapping is allowed!)"); System.err.println(" (Only one table can be specified, and no mapping is allowed!)");
System.err.println("Other options: (specify time range to WAL edit to consider)"); System.err.println("Time range options:");
System.err.println(" -D" + WALInputFormat.START_TIME_KEY + "=[date|ms]"); System.err.println(" -D" + WALInputFormat.START_TIME_KEY + "=[date|ms]");
System.err.println(" -D" + WALInputFormat.END_TIME_KEY + "=[date|ms]"); System.err.println(" -D" + WALInputFormat.END_TIME_KEY + "=[date|ms]");
System.err.println(" -D " + JOB_NAME_CONF_KEY System.err.println(" (The start and the end date of timerange. The dates can be expressed");
+ "=jobName - use the specified mapreduce job name for the wal player"); System.err.println(" in milliseconds since epoch or in yyyy-MM-dd'T'HH:mm:ss.SS format.");
System.err.println(" E.g. 1234567890120 or 2009-02-13T23:32:30.12)");
System.err.println("Other options:");
System.err.println(" -D" + JOB_NAME_CONF_KEY + "=jobName");
System.err.println(" Use the specified mapreduce job name for the wal player");
System.err.println("For performance also consider the following options:\n" System.err.println("For performance also consider the following options:\n"
+ " -Dmapreduce.map.speculative=false\n" + " -Dmapreduce.map.speculative=false\n"
+ " -Dmapreduce.reduce.speculative=false"); + " -Dmapreduce.reduce.speculative=false");
} }
/** /**