Application container software installed on Flux and Armis

By | General Interest, News

Singularity, which is new “application container” software, has been installed on the Flux and Armis HPC clusters. An application container is a program — a single file — that can be used to combine an application with the system software it needs to run. This enables applications to run on the clusters even if the system software is different. For example, an older application that is needed to finish a project can continue to be used even if it is incompatible with the updated cluster. An application that needs a different Linux distribution can be containerized to run on the cluster.

Singularity containers cannot be created on Flux or Armis, but they can be created and brought to the clusters to run.  Singularity provides tools to convert Docker containers for use on Flux and Armis. Please contact hpc-support@umich.edu if you are interested in using Singularity and would like more information about how to create and run Singularity containers or would like a referral to unit support who can help.

Information about Singularity on Flux and Armis can be found at http://arc-ts.umich.edu/software/singularity and about Singularity itself at http://singularity.lbl.gov/

HPC Maintenance

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To accommodate upgrades to software and operating systems, Flux, Armis, and their storage systems (/home and /scratch) will be unavailable starting at 9am Saturday, January 7th, returning to service on Monday, January 9th.  Additionally, external Turbo mounts will be unavailable 11pm Saturday, January 7th, until 7am Sunday, January 8th.

During this time, the following updates are planned:

  • Operating system and software updates (minor updates) on Flux and Armis.  This should not require any changes to user software or processes.
  • Resource manager and job scheduling software updates.
  • Operating system updates on Turbo.

For HPC jobs, you can use the command “maxwalltime” to discover the amount of time before the beginning of the maintenance. Jobs that cannot complete prior to the beginning of the maintenance will be able to start when the clusters are returned to service.

We will post status updates on our Twitter feed ( https://twitter.com/arcts_um ) and send an email to all HPC users when the outage has been completed.

HPC maintenance scheduled for January 7 – 9

By | Flux, General Interest, News

To accommodate upgrades to software and operating systems, Flux, Armis, and their storage systems (/home and /scratch) will be unavailable starting at 9am Saturday, January 7th, returning to service on Monday, January 9th.  Additionally, external Turbo mounts will be unavailable 11pm Saturday, January 7th, until 7am Sunday, January 8th.

During this time, the following updates are planned:

  • Operating system and software updates (minor updates) on Flux and Armis.  This should not require any changes to user software or processes.
  • Resource manager and job scheduling software updates.
  • Operating system updates on Turbo.

For HPC jobs, you can use the command “maxwalltime” to discover the amount of time before the beginning of the maintenance. Jobs that cannot complete prior to the beginning of the maintenance will be able to start when the clusters are returned to service.

We will post status updates on our Twitter feed ( https://twitter.com/arcts_um ) and send an email to all HPC users when the outage has been completed.