Gateway

Rolling reboots on owens and pitzer starting 26 July 2021

We will have rolling reboots of Owens and Pitzer cluster, including login and compute nodes, starting from 9am on July 26, 2021. The rolling reboot is for urgent security updates. The rolling reboots won't affect any running jobs, but users may experience longer queue wait time than usual on the cluster. User will also expect about a 10 minute outage of login nodes during the reboot of login nodes. If there are interactive jobs started from a login node and that login node is rebooted, then the job will be killed.

Please review your usage of /fs/ess

Recent improvements to a routine OSC accounting process resulted in larger adjustments to file counts and quota usages than anticipated for some accounts. The updated metrics are more accurate but some users may now have less free space than expected. Please review your usage closely and, if necessary, remove unneeded data or request a quota expansion via OSCHelp to avoid exhausting your available space.

Problems with GPFS filesystem

We are experiencing some problems with GPFS filesystems this morning (Thursday, June 10). OnDemand is not working. It may also cause unexpected job failures. We are working hard to fix this issue, and will provide more updates once we know more. See this page: https://www.osc.edu/resources/technical_support/known_issues/problems_with_gpfs_filesystem_and_ondemand_is_not_working

Firewall and Proxy Settings

Connections to OSC

In order for users to access OSC resources through the web your firewall rules should allow for connections to the following publicly-facing IP ranges.  Otherwise, users may be blocked or denied access to our services.

  • 192.148.248.0/24
  • 192.148.247.0/24
  • 192.157.5.0/25

The followingg TCP ports should be opened:

  • 80 (HTTP)
  • 443 (HTTPS)
  • 22 (SSH)

The following domain should be allowed:

Training

OSC offers online and in-person training for new and advanced users on a variety of high performance supercomputing topics.

New! Online Training Courses

OSC has partnered with The Ohio State University to offer online training courses that clients can complete at their own pace at any time on the ScarletCanvas platform, Ohio State's public learning management system.

The available courses are:

Getting Connected

There are two ways to connect to our systems. The traditional way will require you to install some software locally on your machine, including an SSH client, SFTP client, and optionally an X Windows server. The alternative is to use our zero-client web portal, OnDemand.

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