At IU, where is my scratch or project directory on the Data Capacitor II or DC-WAN2 file system, and how do I view directory permissions and determine how much space I'm using?

At Indiana University, the Data Capacitor II (DC2) and Data Capacitor Wide Area Network 2 (DC-WAN2) file systems are mounted on Big Red II, Carbonate, Karst, and Mason as /N/dc2 and /N/dcwan, respectively. In the following examples, replace username with your Network ID username, or projectname with the name of your project.

Note:
Mason, Indiana University's large memory computer cluster, will be retired on January 1, 2018. For more, see About the Mason retirement.

On this page:


Locating your scratch or project directory

On Big Red II, Carbonate, Karst, or Mason:

  • Your scratch directory on DC2 will be mounted at:
    File system Mount point
    DC2 /N/dc2/scratch/username

  • Your project directory on DC2 or DC-WAN2 will be mounted at:
    File system Mount point
    DC2 /N/dc2/projects/projectname
    DC-WAN2 /N/dcwan/projects/projectname

Viewing permissions

To view the permissions for your scratch directory on DC2, use:

File system Command
DC2 ls -al /N/dc2/scratch/username

To view the permissions for your project directory on DC2 or DC-WAN2, use:

File system Command
DC2 ls -al /N/dc2/projects/projectname
DC-WAN2 ls -al /N/dcwan/projects/projectname
Note:
The output of the ls command will display the permissions for the directory, as well as the owner and group of the directory.

Determining how much space you're using

To display the amount of disk space available on the DC2 and DC-WAN2 file systems, use the df command:

  df -h

The -h argument tells df to display sizes in human-readable format (e.g., 2T for two terabytes). This will display the space available and used for both file systems; look for the /N/dc2 and /N/dcwan mount points to find the space available on each file system.

To determine the amount of space you're using in your project directory, use the du command:

  du -sh /N/dc2/projects/projectname
  du -sh /N/dcwan/projects/projectname

The du command estimates disk usage of each file recursively for directories. The -sh argument tells du to summarize (display only a total) using a human-readable format.

Getting help

For technical support or general information about the DC2 and DC-WAN2 file systems, contact the UITS High Performance File Systems group.

For after-hours support, call Data Center Operations (812-855-9910), and ask to have High Performance File Systems contacted.

To receive maintenance and downtime information, subscribe to the hpfs-maintenance-l@indiana.edu mailing list; see On IU List, how do I subscribe to a list?

This is document axod in the Knowledge Base.
Last modified on 2017-11-13 12:57:05.

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