Skip to content

Disk Space and Storage Options

This document provides an overview of the disk space and storage options available on the DEC cluster. Understanding the different storage locations and their intended purposes can help you make informed decisions about where to store your data and how to manage your files effectively.

Please note that we are currently not applying quotas to the storage spaces. However, we encourage users to be mindful of their storage usage and avoid storing unnecessary or duplicate data to ensure optimal performance and resource availability for all users.

In any case, please be considerate of other users and respect the DEC code of conduct.

For CPPM members, your home directory is your lab's home directory. Take care of the data you store there, even if no quota is applied on DEC, the lab's quota applies on CPPM home directory.

Main Storage Disks

/softdec

  • Size: 100 GB
  • Configuration: Part of a larger 300 TB disk, not saved, under RAID 4.
  • Purpose: This partition is dedicated to general software that is used across various projects. It is not suitable for personal data storage.
  • Example: Store shared applications and tools that need to be accessed by all users.

/datadec

  • Size: 300 TB
  • Configuration: Part of the primary 300 TB disk, not saved, under RAID 4.
  • Purpose: Designed for storing your active project data.
  • Example: Use this space for ongoing projects where data accessibility and speed are crucial.

Additional Disks

/loftdec

  • Size: 100 TB
  • Purpose: This disk is intended for data storage related to active projects and collaborations.
  • Example: Ideal for storing large datasets that are frequently accessed and modified during the course of your research.

/roofdec

  • Size: 100 TB
  • Purpose: Allocated for archiving purposes.
  • Example: Use this space to store completed project data or historical data that is accessed infrequently.

Local Storage on Computing Nodes

/data

  • Size: 860 GB
  • Configuration: Local disk, not saved, not under RAID.
  • Purpose: This disk is recommended for storing temporary files that are specific to individual jobs or sessions.
  • Example: Temporarily store intermediate computation results, logs, or files that are required for running short-term processes.

Distributed File System (GlusterFS)

/scratch

  • Size: 7 TB
  • Configuration: Distributed file system, not saved, not under RAID, replicated across 3 nodes.
  • Purpose: Enables shared access to data across different nodes, facilitating collaboration and data sharing among various jobs.
  • Example: Store data that needs to be accessed or modified by multiple jobs running on different nodes, such as input files for simulations that are processed in parallel.
  • Note: GlusterFS uses the space available on /data disks of individual nodes, making it accessible across the cluster. This shared space is ideal for temporary data needed during job runs but should not be used for long-term storage due to its non-redundant configuration.