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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7701) Support reporting per storage type quota and usage with hadoop/hdfs shell
Date Thu, 26 Mar 2015 21:51:53 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14382758#comment-14382758

Xiaoyu Yao commented on HDFS-7701:

[~shihaoliang], thanks for the contribution. Overall, the patch looks good to me. I also built
and tested the patch on my local machine. 
I will +1 (non-binding) with the following issues addressed.

1. We should check type quota is set or not ( quota > 0) before calling formatSize. If
it is not set, we should use default string "none" and "inf" for quota and rem_quota instead
of showing "-1", "-1"

                long quota, consumed;
361	        quota = getTypeQuota(st);
362	        consumed = getTypeConsumed(st);
363	        content.append(String.format(STORAGE_TYPE_SUMMARY_FORMAT,
364	            formatSize(quota, hOption),
365	            formatSize(quota - consumed, hOption)));

2. Parameter parsing issue: additional storage type parameter should not be treated as a path.
HW11217:deploy xyao$ hdfs dfs -count  -q  -v -h -t SSD /q1
count: `SSD': No such file or directory
         300 M              300 M /q1

3. The following help message can be reworded from
"The -" + OPTION_HEADER + " option displays a header line.\n" +
71	          "The -" + OPTION_TYPE + " option is only works when -" + OPTION_QUOTA +
72	          " option is enabled,\n" +
73	          "if storage type is given, \n" +
74	          "display the quota and usage for the type, if no storage type, \n" +
75	          "display the quota and usage for all the storage types";


          "The -" + OPTION_HEADER + " option displays a header line.\n" +
          "The -" + OPTION_TYPE + " option displays quota by storage types.\n" +
          "It must be used with -" + OPTION_QUOTA + " option.\n" +
          "If a storage type is given after -" + OPTION_TYPE + " option, \n" +
          "it displays the quota and usage for the specified type. \n" +
          "Otherwise, it displays the quota and usage for all the storage \n" +
          "types that support quota";

4. We don't require javadoc for private method {code} getAndCheckStorageTypes{code} unless
you need to explain the logic inside it.  If you do, making sure the @return is updated.

5. In TestCount.java, please import specific package individually and don't import package
with wild card.  
{code}import org.apache.hadoop.fs.*;{code}

6. Miss a "r" in the name of the test "processPathWithQuotasBySSDStorageTypesHeade"

7. Fix the Jenkins failure "org.apache.hadoop.cli.TestCLI"

> Support reporting per storage type quota and usage with hadoop/hdfs shell
> -------------------------------------------------------------------------
>                 Key: HDFS-7701
>                 URL: https://issues.apache.org/jira/browse/HDFS-7701
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>            Reporter: Xiaoyu Yao
>            Assignee: Peter Shi
>         Attachments: HDFS-7701.01.patch
> "hadoop fs -count -q" or "hdfs dfs -count -q" currently shows name space/disk space quota
and remaining quota information. With HDFS-7584, we want to display per storage type quota
and its remaining information as well.
> The current output format as shown below may not easily accomodate 6 more columns = 3
(existing storage types) * 2 (quota/remaining quota). With new storage types added in future,
this will make the output even more crowded. There are also compatibility issues as we don't
want to break any existing scripts monitoring hadoop fs -count -q output. 
> $ hadoop fs -count -q -v /test
>         none             inf       524288000       524266569            1           15
             21431 /test
> Propose to add -t parameter to display ONLY the storage type quota information of the
directory in the separately. This way, existing scripts will work as-is without using -t parameter.

> 1) When -t is not followed by a specific storage type, quota and usage information for
all storage types will be displayed. 
> $ hadoop fs -count -q  -t -h -v /test
>         512MB             256MB       none             inf         none      inf    
> 2) If -t is followed by a storage type, only the quota and remaining quota of the storage
type is displayed. 
> $ hadoop fs -count -q  -t SSD -h -v /test
> 512 MB             256 MB                   /test

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