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All cluster logins from outside the HMS network require two-factor authentication. For more details, please reference Two Factor Authentication on O2 and Two Factor Authentication FAQ. Please contact us if you are having trouble with two-factor authentication on O2. 

Please do NOT send us or anyone else your password. Ever. We can assist you without knowing your password, and sharing accounts on the cluster is prohibited by Harvard security policy.

If you're having difficulty logging in to O2, make sure you're using your HMS account (in lowercase) and HMS account password to log in. If that does not resolve the problem, you can reset your HMS account password. Contact the HMS IT Service Desk (itservicedesk@hms.harvard.edu, or 617-432-2000) if you're unable to login to the HMS account management website. Your HMS account may have been locked due to too many failed login attempts to the O2 cluster. Once you are able to login to the HMS account management site, wait 1 hour and try logging in to O2 again. If you're still facing problems, then send in a ticket to us.

Files, Storage, Quotas

Where can I put my data?

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How am I supposed to know how long my job will take?

You can use the O2sacct O2_jobs_report command to get detailed information on resource usage of your completed jobs, including how long the job took. See here for an introduction on using O2sacctO2_jobs_report.

By running test versions of your workflow (to make sure that the process is correct), you can get a sense of how long the full workflow will run. Remember that jobs can die for a variety of reasons so it's always best to design your workflow so you can quickly recover if it gets interrupted. Please contact us if you would like help with this. Especially if you are just running something once, it's fine to overestimate the runtime limit.

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