Directory Usage Report

Minimum Required Role:BDR Administrator (also provided by Full Administrator and Cluster Administrator)

The directory usage report allows you to browse the HDFS filesystem in a way that is similar to the HDFS File Browser . However, the Directory Usage Report also allows you to sort the listings and select multiple items and perform actions on them. You can also view the last access time, the last modified time of any file in a directory, and the total size of all files in the directory. This usage information is updated on an hourly basis.

You can customize the report by adding filters. A number of preconfigured filters are available, and you can create a custom filter.

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Accessing the Directory Usage Report

To view the directory usage report, click Clusters > Cluster Name > Reports > Directory Usage.

You can also access this report from the HDFS File Browser. (To access the File Browser, click Clusters > HDFS service > File Browser.) Click the Directory Usage link located in the lower-right portion of the File Browser.

Using the Directory Usage Report

When you first open the report, the top level of the HDFS filesystem displays:



Click the Reports link next to the Directory Usage title to go back to the Reports menu. You can also click links to go to the cluster and HDFS service home pages.

Click any column header to sort the display.

Click a directory name to view the files and subdirectories in the directory.

Select one or more rows by checking the boxes on the left and then choose an action to perform on the selection from the Actions for Selected drop-down menu. You can select the following actions:
  • Manage Quota – A dialog box opens in which you can set a quota for the number of files or disk space. These values are displayed in columns in the file listing.
  • Include selected directories in disk usage reports – The selected directories appear in the Disk Usage Reports.
  • Exclude selected directories from disk usage reports – The selected directories do not appear in the Disk Usage Reports.

Filters

You can use filters to limit the display and to search for files. To apply filters to the directory usage report, click the Filters drop-down menu near the top of the page and select one of the following preconfigured filters:
  • Large Files
  • Large Directories
  • By Specific Owner
  • By Specific Group
  • Old Files
  • Old Directories
  • Files with Low Replication
  • Overpopulated Directories
  • Directories with Quotas
  • Directories Watched
To modify any of these filters, click the Customize link and select new criteria. Click Clear to revert to the preconfigured criteria for the filter.

Click the Search button to display the report with the filters applied.

You can also select Custom from the Filters drop-down menu to create a report in which you define the criteria. To create a custom report:
  1. Select any of the following criteria from the drop-down menu on the left:
    • Filename
    • Owner
    • Group
    • Path
    • Last Modified
    • Size
    • Diskspace Quota
    • Namespace Quota
    • Last Access
    • File and Directory Count
    • Replication
    • Parent
    • Raw Size
  2. Select an operator from the drop-down menu.
  3. Enter a value and units of measure for the comparison.
  4. Select the units of measure for the comparison from the drop-down menu. (Some criteria do not require units of measure.)
  5. Click the icon to add additional criteria.
  6. Click the Search button to display the directory usage report with the custom filter applied.

    The report changes to display the result of applying the filter. A new column, Parent is added that contains the full path to each file or subdirectory.

Disk Usage Reports

There are two types of disk usage reports: Current Disk Usage By Directory and Historical Disk Usage By Directory. To use these reports, select one or more directories to watch by clicking the icon for the directory. You can also select multiple directories, and then click Actions for Selected > Include selected directories in disk usage reports.

For information on using and configuring the Disk Usage Report, see Disk Usage Reports.