Operating Status

Percent Utilization over the past 24 hours (Red Cloud)

Status and Downtime Notices

• Downtime for regular Web server maintenance will occur the Wednesday following the second Tuesday of every month.
• Only one e-mail will be sent per downtime, to all project members.
• Information concerning completion of the work or extension of the downtime will be posted on this page.

WHY: Upgrade OS and apply software patches on cloud controller for Jetstream2 Cornell Region

WHO WILL BE AFFECTED: Users of Jetstream2 Cornell Region

WHAT WILL BE AFFECTED:

  • During the maintenance window, Horizon and Exosphere web consoles and Openstack API will not be available.
  • External network access for instances on private networks will not be available. Instances should continue to run without disruption.

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

 Hopper cluster is back in service. If you continue to experience problems, please email help@cac.cornell.edu for assistance.

 

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

 Hopper cluster is unavailable due to a file system issue. CAC system staff is investigating.

 

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

OUTAGE REASON(S): To apply May 2026 security patches (Windows and Linux)

WHO WILL BE AFFECTED? Users of CAC managed resources housed in Rhodes Hall

WHAT WILL BE UNAVAILABLE WHILE THEY ARE PATCHED AND REBOOTED?

  • Servers: Linuxlogin, Mysql2, RT, seneca, praxis1
  • https://www.cac.cornell.edu/
  • CAC Archival Storage: Archival storage will not be accessible during the downtime.

WHAT WILL NOT BE AFFECTED THIS MONTH?

  • Linux Clusters: Aclab, AIDA, Altas, CapeCrystal, Cayuga, CommCloud, Cqmetrics, Hopper, Marvin, Marx1, Mbot, Pool, Tardis3, Yuegroup
  • Red Cloud

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

NEXT SCHEDULED MAINTENANCE: Wednesday, June 10th, 2026

 Emergency maintenance has been completed on capecrystal cluster. The cluster is now ready for use.

 

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

 HPC Clusters, except for capecrystal, are now back online for use. Thank you for the cooperation on this emergency downtime.

 Capecrystal is experiencing a unrelated file system problem. CAC is investigating.

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

WHY: A reboot is required to complete an emergency maintenance

WHO WILL BE AFFECTED? Users of all HPC clusters hosted at CAC (aida, altas, capecrystal, cayuga, hopper, marvin, mbot, pool, pool2, seneca, tardis, and yuegroup)

DETAILS:

  • Users of the above HPC clusters should save their work and log off before noon today. File I/O generated by running jobs to user home directories will be disrupted while the head node reboots. The outage should last less than 5 minutes.
  • An update will be posted on this status page when maintenance is completed.

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

OUTAGE REASON(S): To apply April 2026 security patches (Windows and Linux)

WHO WILL BE AFFECTED? Users of CAC managed resources housed in Rhodes Hall

WHAT WILL BE UNAVAILABLE WHILE THEY ARE PATCHED AND REBOOTED?

  • Servers: CommCloud, Linuxlogin, Mysql2, RT, dpm.cac.cornell.edu, nysffa.cac.cornell.edu
  • https://www.cac.cornell.edu/

WHAT WILL NOT BE AFFECTED THIS MONTH?

  • Linux Clusters: Aclab, AIDA, Altas, CapeCrystal, Cayuga, Cqmetrics, Hopper, Marvin, Marx1, Mbot, Pool, Seneca, Tardis3, Yuegroup
  • Red Cloud
  • Archival Storage

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

NEXT SCHEDULED MAINTENANCE: Wednesday, May 13th, 2026

WHY: Upgrade to BeeGFS 7.4.7 to fix a bug that causes node crashes.

DETAILS:  BeeGFS file system and clients have been upgraded to version 7.4.7. The cluster is now available for use.

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.

WHY: Upgrade to BeeGFS 7.4.7 to fix a bug that causes node crashes

WHO WILL BE AFFECTED? All AIDA Cluster Users

DETAILS:

  • During the maintenance window, all user logins will be disabled and all running jobs killed. BeeGFS storage servers, cluster head nodes, and compute nodes will be upgraded to BeeGFS 7.4.7 and rebooted. Users should save their work and log out prior to the maintenance window.
  • An email notification will be sent to cluster users after the upgrade is completed and the cluster is back online.

STATUS: Downtime status will be posted on this page.

QUESTIONS: https://portal.cac.cornell.edu/help.