FAS Research Computing - 历史记录

目前部分性能下降

Status page for the Harvard FAS Research Computing cluster and other resources.

Cluster Utilization (VPN and FASRC login required): Cannon | FASSE


Please scroll down to see details on any Incidents or maintenance notices.
Monthly maintenance occurs on the first Monday of the month (except holidays).

GETTING HELP
Documentation: https://docs.rc.fas.harvard.edu | Account Portal https://portal.rc.fas.harvard.edu
Email: rchelp@rc.fas.harvard.edu | Support Hours

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For higher contrast, switch to light mode at the bottom of this page if the background is dark and colors are muted.
运行正常

SLURM Scheduler - Cannon - 运行正常

Cannon Compute Cluster (Holyoke) - 运行正常

Boston Compute Nodes - 运行正常

GPU nodes (Holyoke) - 运行正常

seas_compute - 运行正常

运行正常

SLURM Scheduler - FASSE - 运行正常

FASSE Compute Cluster (Holyoke) - 运行正常

运行正常

Kempner Cluster CPU - 运行正常

Kempner Cluster GPU - 运行正常

运行正常

FASSE login nodes - 运行正常

运行正常

Cannon Open OnDemand - 运行正常

FASSE Open OnDemand - 运行正常

性能下降

Netscratch (Global Scratch) - 运行正常

Home Directory Storage - Boston - 运行正常

Tape - (Tier 3) - 运行正常

Holylabs - 运行正常

Isilon Storage Holyoke (Tier 1) - 运行正常

Holystore01 (Tier 0) - 运行正常

HolyLFS04 (Tier 0) - 运行正常

HolyLFS05 (Tier 0) - 运行正常

HolyLFS06 (Tier 0) - 性能下降

Holyoke Tier 2 NFS - 运行正常

Holyoke Specialty Storage - 运行正常

holECS - 运行正常

Isilon Storage Boston (Tier 1) - 运行正常

BosLFS02 (Tier 0) - 运行正常

Boston Tier 2 NFS - 运行正常

CEPH Storage Boston (Tier 2) - 运行正常

Boston Specialty Storage - 运行正常

bosECS - 运行正常

Samba Cluster - 运行正常

Globus Data Transfer - 运行正常

历史记录

6月 2023

Mounting storage from campus network
  • 已解决
    UTC
    已解决

    This incident has been resolved.

  • 调查中
    UTC
    调查中

    Due to a HUIT networking issue, mounting storage from wired campus connections may not work.

    We are working with HUIT to resolve this.

    In the meantime, you should still be able to mount storage while connected to the RC VPN.

Emergency maintenance 6/20/23 - Cannon Slurm Scheduler
  • 已计划
    六月 20, 2023 在 上午 11:00UTC
    已计划
    六月 20, 2023 在 上午 11:00UTC

    WHAT
    Emergency Cannon cluster scheduler maintenance Tuesday June 20th from 7am - 11am (actual end time estimated). Running jobs will be paused during maintenance.

    Note: FASSE is unaffected by this.

    WHY
    As most of you know, there are on-going issues with the Cannon scheduler after the downtime and OS upgrades. This behavior did not show up in our earlier testing and only manifested once we were under load from user jobs again.

    After investigation we found that the scheduler is oscillating between two states every hour. During even hours the scheduler would enter a high thread state where all the traffic would pile up, causing any queries to either take a long time or time out. During odd hours the scheduler would enter a low thread state and operate normally. During periods where the scheduler is responding, jobs can be submitted and should then run normally.

    Unfortunately the root cause is still not known, and we are working closely with the vendor, SchedMD, to find a solution to return the cluster to stability. The version of slurm that we are running is 22.05.7, which while very stable — we have been running on it for the past 5 months with no problems — appears to be having issues at scale on Rocky 8.

    There is a newer version of the scheduler available, 23.02.3. This new version has a host of improvements. While the specific issue described above is not listed as one of the items fixed in this version, we anticipate that the upgrade may fix this issue owing to the various code improvements contained therein.

    Barring any solutions found over the long weekend, we intend to hold an emergency maintenance period on Tuesday June 20th starting at 7am. Running jobs will be paused. We will return Cannon to service as soon as we've completed work. Status of this maintenance will be tracked here on our status page.

    We thank you for your patience and understanding. Our team is hard at work answering your tickets and making sure that the cluster is back to full health. Also as a reminder that we hold additional Office Hours each week in June. See: https://www.rc.fas.harvard.edu/training/office-hours/

    FAS Research Computing
    https://www.rc.fas.harvard.edu/
    https://docs.rc.fas.harvard.edu/
    https://status.rc.fas.harvard.edu/

  • 已完成
    六月 20, 2023 在 上午 1:16UTC
    已完成
    六月 20, 2023 在 上午 1:16UTC

    CANCELLED

    Emergency maintenance has has been cancelled. A solution to the scheduler issue has been found and Slurm is once again operating normally.

    We thank you for your patience and understanding.

Slurm scheduler slowness/delays
  • 已解决
    UTC
    已解决

    This incident has been resolved.

    A solution to the Slurm scheduler issue has been found and implemented. The scheduler is now operating normally.

    Thank you for your patience and understanding.

  • 更新
    UTC
    更新

    PLEASE SEE EMERGENCY MAINTENANCE NOTICE BELOW
    Emergency maintenance Tuesday June 20th 7am-11am. Running jobs will be paused.

    We are still working on finding the root cause of the scheduler slowness and timeouts. We are working with SchedMD and have sent diagnostic information for analysis.

    At this time the scheduler is up but may become unresponsive to your commands at times. You can wait and retry them.

    Jobs, once launched, should run as expected.

    OOD/VDI are working, but job submission may also be affected.

    If you receive salloc: error: Job submit/allocate failed: Invalid account or account/partition combination specified, waiting a moment and re-submitting your job again should result in a successful submission.

    Addendum: It was determined that the issue is cyclical and you will have the best luck during odd hours (e.g. - after 1pm, before 2pm) and less success interfacing with the scheduler during even hours (e.g. - after 2pm, before 3pm).

    We regret the impact this is having on your work. Updates will follow as we have them.

  • 更新
    UTC
    更新

    We are still working on finding the root cause of the slowness and are working with the vendor to troubleshoot.

    At this time the scheduler is up but may become responsive to your commands at times. Jobs, once launched, should run as expected.

  • 更新
    UTC
    更新

    Slurm is still being overwhelmed with large numbers of requests. VDI timeouts/502 errors, interactive job connections, job submissions, are all impacted.

    We are in contact with the Slurm developers to find a better resolution.

  • 持续监控中
    UTC
    持续监控中

    We have implemented updates and the scheduler appears stable and responsive.
    We will continue to monitor and update this incident.

  • 调查中
    UTC
    调查中

    We are currently investigating performance issues with the scheduler. This manifests in slowness when submitting jobs, job submission fails some percentage of the time, and timeout errors (including OOD/VDI).

    Also, some jobs may not exit cleanly putting nodes into drain status.

    We are working to resolve this issue. Updates to follow.

Cannon and FASSE OOD (VDI) issues
  • 已解决
    UTC
    已解决

    This incident has been resolved. FASSE and Cannon OOD are both available.

  • 持续监控中
    UTC
    持续监控中

    Cannon and FASSE OOD are not fully operational due to slurm being slow. With slurm slow, the apps wait too long to be launched and it can throw 502 errors

  • 已确认问题
    UTC
    已确认问题

    Cannon OOD is operational.

    FASSE OOD is still experiencing issues and showing errors for new connections. Existing connections are working.
    WIP

  • 调查中
    UTC
    调查中

    We are currently investigating issues with OOD (OpenOnDemand aka VDI).

fasselogin nodes
  • 已解决
    UTC
    已解决

    Login to fasselogin is working. Additional login nodes are not in the rotation and will be added back once they are healthy again. But normal login is working.

  • 调查中
    UTC
    调查中

    We are currently investigating an issue with fasse login nodes (fasselogin) timing out or not connectring.

5月 2023

本月无故障记录

4月 2023

MGHPCC - issues affecting some connectivity
  • 已解决
    UTC
    已解决

    This incident has been resolved.

    Network admins found that one of the line cards on the Nexus core switch was not functioning correctly and dropping IPv4 traffic randomly. The card will be replaced as soon as possible. In the meantime, it has been isolated and connectivity has returned to normal

    Thanks for your patience.
    FASRC

  • 调查中
    UTC
    调查中

    We are currently investigating this incident. The majority of services appear to be working normally, but reports of random storage or service connectivity indicate an issue with networking or power at MGHPCC.

    Updates to follow as we know more.

Harvard DNS continues to experience outages
  • 已解决
    UTC
    已解决

    As far as we are aware, Harvard's DNS issues are resolved.

  • 已确认问题
    UTC
    已确认问题

    Harvard's DNS (name resolution system which translates hostnames to IP addresses) continues to experience degradation and periodic outages. This issue may affect access to any hostname/address ending in harvard.edu.

    While this should not affect jobs inside the cluster, it will impact other resources users are trying to access including reaching login nodes, VPN, websites, drive mapping, this status page, etc.

    This is a university-wide issue and outside FASRC's control. We will continue to monitor the situation, but for mire information please see Harvard's status page (which may also be inaccessible at times): https://status.huit.harvard.edu/

FASRC Monthly Maintenance April 3rd 2023 7am-11am
  • 已完成
    四月 03, 2023 在 下午 3:00UTC
    已完成
    四月 03, 2023 在 下午 3:00UTC

    Maintenance has completed successfully

  • 进行中
    四月 03, 2023 在 上午 11:00UTC
    进行中
    四月 03, 2023 在 上午 11:00UTC

    Maintenance is now in progress

  • 已计划
    四月 03, 2023 在 上午 11:00UTC
    已计划
    四月 03, 2023 在 上午 11:00UTC

    FASRC Monthly Maintenance will occur April 3rd 2023 7am-11am
    Please note that because of the June downtime, we will not hold monthly maintenance in May and July.

    JUNE DOWNTIME AND OS/SOFTWARE CHANGES
    The MGHPCC yearly power downtime will run June 5th-8th with return to full service the morning of Friday June 9th. For timeline and initially details on the downtime, our switch Rocky Linux, and changes to how we do software, please see: https://www.rc.fas.harvard.edu/blog/2023-downtime/

    Also see our Rocky 8 Transition Guide for information on the OS and upcoming test cluster. We will also offer training and consulting in the coming months (TBA). https://docs.rc.fas.harvard.edu/kb/rocky-8-transition-guide/

    Notices about the downtime with links to training, docs, and FAQs will commence in a few weeks.

    TRAINING CALENDAR
    Upcoming new user training and other sessions can be found on our training calendar: https://www.rc.fas.harvard.edu/upcoming-training/

    APRIL 3rd MAINTENANCE

    • Login node and VDI reboots
      -- Audience: Anyone logged into a a login node or VDI/OOD node
      -- Impact: Login and VDI/OOD nodes will rebooted during this maintenance window

    • RCSMB server network changes
      -- Audience: Mounted Samba shares connected at "rcsmb.rc.fas.harvard.edu"
      -- Impact: None expected. The possibility of brief disconnects
      is possible but unlikely.

    • Squid internet proxy update
      -- Audience: Any users/session/process using the internet proxy (https://docs.rc.fas.harvard.edu/kb/proxy-settings/)
      -- Impact: The proxy will be unavailable while updating

    • Scratch cleanup ( https://docs.rc.fas.harvard.edu/kb/policy-scratch/ )
      -- Audience: Cluster users
      -- Impact: Files older than 90 days will be removed.
      planning for a scheduled maintenance during that time.

    Thanks,
    FAS Research Computing
    Department and Service Catalog: https://www.rc.fas.harvard.edu/
    Documentation: https://docs.rc.fas.harvard.edu/
    Status Page: https://status.rc.fas.harvard.edu/

4月 2023 至 6月 2023

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For issues not shown here, please contact FASRC via
https://portal.rc.fas.harvard.edu or email rchelp@rc.fas.harvard.edu