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🚧 OSPool AP Migration: Users on Access Points ap20, ap21 and ap23 are being migrated in December 2025. Learn more at: OSPool Migration Details

OSPool service migration for ap20-21-23

The Open Science Pool (OSPool) is migrating certain OSPool and OSDF services to new physical / institutional locations. This transition is part of a larger service migration that will streamline and simplify how we run our services, positioning ourselves for long-term sustainability.

If your account is on Access Points ap20 or ap21 (with the suffix uc.osg-htc.org) you will be moving to a new Access Point in early December.

Some projects on Access Point ap23.uc.osg-htc.org, the OSG Collab AP, will also be moving to a new Access Point in early December. The users for those projects will be individually notified.

Please read below for the migration timeline, downtime dates, and post-transition steps.

➡️ Timeline

➡️ What to expect

➡️ What you should do

If your account is NOT on ap20-21-23 (for example, ap40.uw.osg-htc.org or ap1.facility.path-cc.io), there will be no changes to your account.

If you have accounts on one of ap20-21-23 AND another Access Point like ap40.uw.osg-htc.org there will be no changes to your ap40 account; contact [email protected] to coordinate consolidating your account information.

Migration timeline

  • For ap20-21 users: Go here
  • For ap23 users who are migrating: Go here

Timeline for ap20-21 users

  • November 30, 2025: We recommend submitting jobs to ap20-21 no later than this date.
  • December 8, 2025: You may test login to the new Access Points. You will not be able to submit jobs.
  • December 8-15, 2025: ap20-21 will be shut down during these dates.
    • December 8, 2025: Job submission is disabled on ap20-21. You can no longer submit new jobs through these Access Points
    • December 11, 2025: Logins to ap20–21 are disabled; any jobs still in the queue after Dec 11 will be removed.
    • December 11-15, 2025: All ap20-21 data will be synced to a temporary location (/migrated).
  • December 15, 2025: You can submit jobs from the new Access Points.
    • You should copy your data (/migrated) to new /home and /ospool/data locations.
  • December 15 - January 22, 2026: We will have dedicated office hours for helping users with the migration.
  • May 2026: Access to /migrated data will be turned off.

Timeline for ap23 users who are migrating

  • November 30, 2025: We recommend submitting jobs to ap23 no later than this date.
  • December 8, 2025: You may test login to the new Access Points. You will not be able to submit jobs.
  • December 8-15, 2025: Migration window
    • December 8, 2025: Job submission is disabled for migrating users on ap23.
    • December 11, 2025: ap23 users who are migrating to the new infrastructure will have their logins disabled.
    • December 11-15, 2025: All ap23 /home and /scratch data from users moving to the new infrastructure will be synced to a temporary location: /migrated.
  • December 15, 2025: You can submit jobs from the new Access Points.
    • You should copy your data from /migrated to your new /home, including data that used to be on /scratch.
    • Collaboration shared data in /ospool/uc-shared/projects/<project> and /ospool/uc-shared/public/<project> will be migrated to a set of new Pelican origins on behalf of the collaboration
  • December 15 - January 22, 2026: We will have dedicated office hours for helping users with the migration.
  • May 2026: Access to /migrated data will be turned off.

What to expect

  • You will be unable to submit and run jobs on the OSPool between Dec. 8-15.
  • You may log into your new Access Point after Dec. 8.
  • You may submit jobs on the new Access Points after Dec. 15.
  • What happens to your data:
    • We will copy all user data from ap20, 21 (/home, /ospool) to a temporary /migrated directory.
    • We will copy all user data from ap23 (/home, /scratch) to a temporary /migrated directory.
    • We will copy all shared data in /ospool/uc-shared to a new shared location, which will be accessible by the new access point.
    • After Dec 15, you are responsible for copying any data you want to keep from /migrated into your new /home or /ospool directories.
    • Your data in /migrated will remain available until May 2026.

What you should do

Get ready for new Access Points (Dec 8 - 15)

The AP41 access points are almost ready to take over as your primary gateway to the OSPool—and this upgrade brings improved stability, performance, and a cleaner, modernized identity system. Now is the perfect time to explore the new environment and make sure your workflows are ready for launch day.

Here’s how you can prepare:

  • Log in to your new Access Point.
  • Try out your new Access Point with small test jobs to confirm that your scripts, containers, and input/output paths behave as expected in the upgraded environment.
  • Update any automation or hard-coded references to AP20/21 or old data paths, as these will be retired after the transition.
  • Verify your new account in the OSPool Account Portal to ensure your identity and group memberships are set up correctly.

Details on all these steps are below. We will send you a Welcome to Your New OSPool Account email on Dec 15th with additional information when the Access Points are fully ready for launch.

Where to log in

Your username will remain the same; however, your AP’s SSH address will change. See below for your new address.

Old AP Address New AP Address
ap20.uc.osg-htc.org ap41.uw.osg-htc.org
ap21.uc.osg-htc.org ap41.uw.osg-htc.org
ap23.uc.osg-htc.org
Only notified users will be migrated		 ap43.uw.osg-htc.org

Test-drive your new access point

We encourage you to take your new AP41 account for a spin during the migration period! This is a great time to confirm that your workflows submit and run as expected in the new environment. Please keep these early submissions limited to small, lightweight test jobs, since services and data paths are still coming online.

Update data paths

Your /ospool directories have changed.

  • Your new /home $HOME path will be in the same path (/home/<user.name>/)
  • Your /ospool/ $DATA path is now /ospool/ap41/data/<user.name>/

Log in to your new OSPool account portal (registry.cilogon.org)

As part of the migration to the AP41 access points, you have access to a new identity/account management portal within the OSPool ecosystem. You can review and manage your identity/account through the OSPool Account Portal at registry.cilogon.org.

When you log in with your campus credentials, you’ll be able to:

  • Verify your new AP41 account and confirm that it has been successfully created.
  • Check your group and project memberships, including your PI-affiliated groups.
  • Ensure your institutional identity is linked correctly, which is required for job submission under AP41.
  • Upload new SSH keys to your profile to expedite the login process on AP41.
  • Previously uploaded SSH keys to OSGConnect have also been migrated your new registry.cilogon.org account and are ready for use on AP41!

Why are we doing the migration?

  • Unified management: Closer integration between different components of the OSPool/OSDF services ecosystem.
  • Long-term sustainability: As PATh (https://path-cc.io/) enters its 6th year, we are trying to simplify how we administer OSPool/OSDF services to make them more sustainable.

Stay informed

We will post migration updates, downtime notifications, and access instructions in the following places:

Get Help in Office Hours

We will be hosting a series of office hours following the initial migration window. We highly recommend you attend one of these office hour sessions to learn more about these changes.

  • December 16th - 3:00pm - 4:30pm (Central Time) - Use our normal office hours link

  • December 18th - 10:30am - 12pm (Central Time) - Use our normal office hours link

  • January 6th - 3:00pm - 4:30pm (Central Time) - Use our normal office hours link

Contact us

If you have any questions or concerns during this migration period, please contact the OSG support team:
📧 [email protected]

We appreciate your patience and cooperation as we complete this important transition.

Last updated: December 11, 2025