As part of the ongoing effort to upgrade data center capacity for future computing needs, maintenance is scheduled from Wednesday, April 22 at 6 AM through Thursday, April 23 at 5 PM. This will affect all RCAC systems and the Research Network.

During this window, all RCAC systems and research network services will be unavailable, including:

• All Computing Clusters including Bell, Negishi, Gautschi, Scholar, Rowdy, Gilbreth, Hammer, Anvil.
• All Data Storage Systems including Data Depot, Fortress, Anvil Ceph storage, scratch and home storage on clusters, Research Network and ScienceDMZ
• Gateway services including Hubzero, GenAI Studio, Anvil GPT
• www.rcac.purdue.edu
• Geddes
• Globus

How does this maintenance impact you?

• Any Slurm jobs requesting a walltime that would extend past the start of the maintenance will not start and will remain in the queue until after maintenance is complete.
• All active sessions and jobs running on affected systems will be preempted at the start of the outage any queued jobs will not begin until services are restored.
• Access to login nodes, storage systems, and web portals will be unavailable throughout the downtime.
• Automated data workflows that rely on affected systems (e.g., rsync, data pipelines, archive processes) will not function until systems are back online.
• Globus transfers may time out during the maintenance window.

To prepare for this maintenance, we suggest to:

• Download any needed data or scripts before 6:00 AM on April 22.
• Prepare instrumentation devices for the Data Depot to be unavailable and

We appreciate your understanding and cooperation as we complete these necessary upgrades to improve reliability and performance across RCAC infrastructure. For assistance, questions, or concerns contact rcac-help@purdue.edu.

Best regards, Rosen Center for Advanced Computing (RCAC) / Purdue IT

Impact to you Attempts to read files that are on the affected storage may result in error messages

Our IT team is actively working with the vendor to restore service as quickly as possible. We will send an update as soon as more information is available.

Impact To You: At this time, you may notice latency or brief disruptions when accessing certain on-campus or external resources, especially during peak usage periods.

We appreciate your patience while we work to fully resolve the underlying problem and restore normal network performance. We will provide an update by 5:00PM EST today or sooner.

System monitoring has identified an issue where heavy job activity was overloading the Data Depot filesystem used by the clusters and Globus.

You may see the following impacts:

• Globus transfers to and from Depot collections may fail, stall, or run much more slowly than usual.
• Globus logins may be slow or occasionally fail when accessing Depot endpoints.
• Jobs on RCAC clusters that read from or write to Depot may experience slow file access, delayed directory listings, or timeouts.

Our engineers are investigating the high load from a large number of concurrent jobs and are working to reduce the impact on Depot, Globus, and cluster workloads. Existing jobs will continue to run, but any that are heavily Depot‑I/O‑bound may run more slowly or see I/O errors until performance improves. We will provide another update by 5:00PM EST or sooner if the issue is resolved.

Research Computing staff members will monitor the status of all computing and data resources in an effort to ensure continuous availability.

Research Computing staff members will monitor the ticketing system throughout the holiday period and answer critical issues and problems. Non-critical user issues and questions will be addressed beginning January 5th, 2026. There will also be no coffee hour consultations during this break.

Scratch file purging (on community clusters with scratch space) will continue as normal during the break, so be sure to archive your files in scratch storage. This does not apply to Data Depot or home directories -- only scratch storage.

Have a wonderful break, everyone, and we look forward to great things in the new year!

We know how important timely access is to your research and truly appreciate your patience as this gets sorted out. If you have an urgent need or specific concerns, please don’t hesitate to contact us at rcac-help@purdue.edu.

Thanks again for your understanding.

We are actively monitoring the situation and working to resolve the disruptions as quickly as possible. During this time, you may encounter intermittent connectivity problems or degraded performance.

We appreciate your patience and understanding. If you encounter problems that require immediate attention, please contact rcac-help@purdue.edu. For Anvil users, please submit a ticket through ACCESS Help Desk at https://support.access-ci.org/help-ticket.

Research Computing staff members will monitor the status of all computing and data resources in an effort to ensure continuous availability.

Research Computing staff members will monitor the ticketing system throughout the holiday period and answer critical issues and problems. Non-critical user issues and questions will be addressed beginning Thursday, January 2nd, 2025. There will also be no coffee hour consultations during this break.

Scratch file purging (on community clusters with scratch space) will continue as normal during the break, so be sure to archive your files in scratch storage or check for any upcoming purge warning emails during the break. This does not apply to Data Depot or home directories -- only scratch storage.

Have a wonderful break, everyone, and we look forward to great things in the new year!

However, due to reduced staff availability during this period we will be canceling our regularly scheduled Coffee-Hour consultations session for that week. This includes both the Monday in-person consulting hours at the Convergence Center as well as the Tuesday virtual sessions.

We will provide an update by 5PM today.

Critical system outages will be dealt with should they occur during this time. Other support needs will be handled when the University re-opens on January 3rd.

There will also be no coffee hour consultations during this break.

Scratch file purging (on community clusters with scratch space) will continue as normal during the break, so be sure to archive your files in scratch storage or check for any upcoming purge warning emails during the break. This does not apply to Data Depot or home directories -- only scratch storage.

Have a wonderful break, everyone, and we look forward to great things in the new year!

To minimize inconvenience, please check training materials, user guides and FAQs on our websites rcac.purdue.edu for self-help resources. For urgent issues and requests, please mark your tickets as high priority, and we’ll prioritize them accordingly.

Thank you for your collaboration and understanding.

Support staff will be unavailable both today (Monday) and tomorrow (Tuesday) because of other scheduled events. Notably, tomorrow is our Annual Cyberinfrastructure Symposium (we hope to see you there)!

More importantly, as of today, RCAC staff will no longer be offering our regularly scheduled Coffee-Hour consultation services on Wednesday and Thursday, neither in-person or online. This change is being made in an effort to bring the coffee-hour tradition back inline with available staff time and the original expectations of this service. We will continue to offer in-person coffee-hour sessions on Mondays at our Convergence Center location, and online on Tuesdays (at the same 2pm time every week).

Please visit our website (https://www.rcac.purdue.edu/coffee) to keep up on changes.

Thank you,

Rosen Center Staff

https://it.purdue.edu/login/

SSH keys will continue to work uninterrupted, and users of ACCESS systems will see no change to their accounts/access. Only BoilerKey-based login to RCAC systems will be affected by this change. There may be interruptions in login via BoilerKey and Purdue Login around the time of transition just before and after midnight.

We will post a more detailed guide on the exact changes and impacts observed to RCAC systems on Tuesday, June 27th. Thank you for your patience during this big transition for Purdue!

During the downtime, the following will be impacted:

• All Globus services will be unavailable, including Auth, Transfer, Flows, Search, Timer, and Action Providers.
• Users will not be able to authenticate to applications that rely on Auth, including the Globus Web app, Globus command line interfaces, and third party applications and services, such as web portals that use Auth for user login and applications that use Globus services for data management.
• Transfers that are inflight when the downtime begins will resume at the last checkpoint when the services are restored at the end of the maintenance period.
• With the exception of runs from Timers that reach their end criteria during the downtime, a Timer run scheduled during the downtime will execute as soon as the service is restored. If multiple Timer runs are scheduled during the downtime, only one run will execute when the service resumes. We recommend that users check the state of their Timer runs after services have resumed.
• Flow runs that attempt to start a new step during the downtime will fail. We recommend that users check the state of their flow runs after services have resumed.

The global downtime will affect all Globus portals (including transfer.rcac.purdue.edu and globus.org), as well as all endpoints and Globus data collections.

Please refer to official announcement for details and contact us if you have any further questions or concerns (rcac-help@purdue.edu for Purdue RCAC inquiries or ACCESS ticketing system for ACCESS Anvil ones).

Research Computing staff members will monitor the status of all computing and data resources in an effort to ensure continuous availability.

Research Computing staff members will monitor the ticketing system throughout the holiday period and respond to critical issues and problems. Non-critical user issues and questions will be addressed beginning Tuesday, January 3rd, 2023. There will also be no coffee hour consultations during this break.

Scratch file purging (on community clusters with scratch space) will continue as normal during the break, so be sure to archive your files in scratch storage or check for any upcoming purge warning emails during the break. This does not apply to Data Depot or home directories -- only scratch storage.

Have a wonderful break, everyone, and we look forward to great things in the new year!

During the downtime, the following will be impacted:

• All services in the Globus ecosystem that use Auth, including Flows, Search, and Timer, will be unavailable.
• Users will be unable to initiate new transfers. Transfers that are inflight when the downtime begins will resume at the last checkpoint when the services are restored at the end of the maintenance period.
• Users will not be able to log into applications that rely on Globus Auth, including Globus webapp and command line interface.
• All third party applications and services that rely on Globus Auth will be impacted, and users will not be able to login/authenticate.
• Users will be unable to initiate new flow runs. Flow runs that attempt to start a new step during the downtime will fail. We recommend that users check the state of their flow runs after services have resumed.

The global downtime will affect all Globus portals (including transfer.rcac.purdue.edu and globus.org), as well as all endpoints and Globus data collections.

Please refer to official announcement for details and contact us if you have any further questions or concerns (rcac-help@purdue.edu for Purdue RCAC inquiries or help@xsede.org for XSEDE Anvil ones).

Research Computing staff members will monitor the status of all computing and data resources in an effort to ensure continuous availability.

Research Computing staff members will monitor the ticketing system throughout the holiday period and answer critical user questions. Non-critical user questions will be addressed beginning Monday, January 3rd, 2022. There will also be no coffee hour consultations during this break.

Scratch file purging (on community clusters with scratch space) will continue as normal during the break, so be sure to archive your files in scratch storage or check for any upcoming purge warning email during the break. This does not apply to Data Depot or home directories -- only scratch storage.

Have a wonderful break, everyone, and we look forward to great things in the new year!