Here is information on the storage available to Talapas users.

Layout

Each User on Talapas has a home directory located in /home/<username>. By default, these home spaces are private with permissions set to allow access only by the owner.  Note that the quota for this directory is fairly small, currently 25GB.

Users also have access to individual and shared PIRG based storage spaces located in /projects/<PIRG>.  The user's individual space is in /projects/<PIRG>/<username> and that directory is only readable and writable by them.  The PIRG shared directory is in /projects/<PIRG>/shared and is created with permissions to allow read and write access by all PIRG users.  All of these directories share the common PIRG quota, which is fairly large (on the order of terabytes).

Accounting

Storage See Talapas File Structure

Accounting

User home and PIRG projects storage usage on Talapas is tracked using quotas. Users who are in multiple groups it is important to correctly attribute the correct group ownership of files and directories.

GPFS

The primary storage device for Talapas is an IBM Elastic Storage System providing . The filesystem is mounted at /gpfs on all nodes in the cluster and provides 3.1 petabytes of storage using GPFS (General Parallel File System).

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Each compute node is equipped with a local SSD for the operating system as well as providing /tmp for local scratch space . For information on the size of local scratch on a particular node, see Partition List pageif desired. This local storage is relatively small and requires a step in your job workflow to copy results off (presumabley to your PIRG project space) and remove old data. Local disks vary in size depending on the node type and generation. See Partition List page for information.

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