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 10GB25GB.

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 usage on Talapas is tracked using group quotas. For users Users who are in multiple storage groups , it is important that you to correctly attribute the correct group ownership of files and directories to the group that should be "charged" for that storage.

GPFS

The primary storage device for Talapas is a DDN GS14K appliance providing 1.5 an IBM Elastic Storage System providing 3.1 petabytes of storage using GPFS (General Parallel File System). During testing, groups are provided storage free of charge with a default soft limit of 2TB and a 30-day grace period. If more storage is required, contact the system administrators to request an increase to your group's quota.

Local Storage

Each compute node is equipped with a local SSD scratch space. For information on the size of local scratch on a particular node, see Machine Specificationssee Partition List page.

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