[jira] [Created] (HDFS-13957) Fix incorrect option used in description of InMemoryAliasMap

["Yiqun Lin (JIRA)" <ji...@apache.org>]

Yiqun Lin created HDFS-13957:
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             Summary: Fix incorrect option used in description of InMemoryAliasMap 
                 Key: HDFS-13957
                 URL: https://issues.apache.org/jira/browse/HDFS-13957
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: documentation
    Affects Versions: 3.1.1
            Reporter: Yiqun Lin


The incorrect option was used in description of InMemoryAliasMap.
{noformat}
This is a LevelDB-based alias map that runs as a separate server in Namenode. The alias map itself can be created using the fs2img tool using the option -Ddfs.provided.aliasmap.leveldb.path=file:///path/to/leveldb/map/dingos.db -o org.apache.hadoop.hdfs.server.common.blockaliasmap.impl.LevelDBFileRegionAliasMap as in the example above.
{noformat}
Here -o should be -b, -o is specified for output directory of generated fsimage. -b is for block output class. The right usage showed in the doc:
{noformat}
hadoop org.apache.hadoop.hdfs.server.namenode.FileSystemImage \
  -Ddfs.provided.aliasmap.leveldb.path=/path/to/leveldb/map/dingos.db \
  -b org.apache.hadoop.hdfs.server.common.blockaliasmap.impl.LevelDBFileRegionAliasMap \
  -o file:///tmp/name \
  -u CustomResolver \
  hdfs://enfield/projects/ywqmd/incandenza
{noformat}
 



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