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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1877) Create a functional test for file read/write
Date Thu, 19 May 2011 17:46:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036320#comment-13036320

Tsz Wo (Nicholas), SZE commented on HDFS-1877:

- The variables, {{inJunitMode}}, {{BLOCK_SIZE}}, {{dfs}}, are not actually used.  Please
remove them.

- How about the default {{filenameOption}} equals {{ROOT_DIR}}?

- You may simply have {{static private Log LOG = LogFactory.getLog(TestWriteRead.class);}}
+  static private Log LOG;
+  @Before
+  public void initJunitModeTest() throws Exception {
+    LOG = LogFactory.getLog(TestWriteRead.class);

- Please remove the following.  The default is already INFO.
+    ((Log4JLogger) FSNamesystem.LOG).getLogger().setLevel(Level.INFO);
+    ((Log4JLogger) DFSClient.LOG).getLogger().setLevel(Level.INFO);

- Most public methods should be package private.

- Please add comments to tell how to use the command options and the default values.

> Create a functional test for file read/write
> --------------------------------------------
>                 Key: HDFS-1877
>                 URL: https://issues.apache.org/jira/browse/HDFS-1877
>             Project: Hadoop HDFS
>          Issue Type: Test
>          Components: test
>    Affects Versions: 0.22.0
>            Reporter: CW Chung
>            Priority: Minor
>         Attachments: TestWriteRead.java, TestWriteRead.patch
> It would be a great to have a tool, running on a real grid, to perform function test
(and stress tests to certain extent) for the file operations. The tool would be written in
Java and makes HDFS API calls to read, write, append, hflush hadoop files. The tool would
be usable standalone, or as a building block for other regression or stress test suites (written
in shell, perl, python, etc).

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