(1) Information related to Phase 2 Matrix testing (Full Scheraga group)

How is the new

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2014 Matrix different than the old Matrix?

• Link to graphical Graphical representation comparing the old Matrix to the new Matrix, for researchers.
  • Matrix Storage Layout 20141003.pdf
• Link to text page containing full Full details on the new Matrix configurations. For both researchers and support staff.
  • Matrix Partitioning Configuration 2014-09-15.pdf
  • Includes conventions, intentions, and associated technically-imposed limitations.

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Deadlines for researchers' testing

DATE 1:

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Monday, 10/

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19/14: By this date, all researchers are expected to at least simply login (verifying that their account itself works).

• KEEP? Email us once you are in and working by replying to this message using your Cornell account and keep the subject & tracking number.

DATE 2:

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Thursday, 10/

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22/14: By this date, all researchers will need to test and either approve, or report problems with, the software they depend on.

• Report details of any questions or problems you find to the appropriate researcher.
  • See section above, "Each researcher must confirm that the applications they depend on work for them on the new Matrix.", for who to report to.

DATE 3:

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Monday, 10/

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27/14: By this date we expect to have all testing completed, as long as everything is indeed working as expected.

• Any delays in your testing will extend the project schedule.

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Upcoming scheduled events (dove-tailing with above deadlines for researchers)

• DayOfWeekThursday, dateOct. 15: ChemIT makes a copy of the end-user's home directory (on the old Matrix) onto the end-user's storage directory (on the new Matrix), for testing purposes.
• Thursday, 10/Oct. 16: End-user testing starts.
• DayOfWeekFriday, dateOct 31: ChemIT deletes copy of end-user's storage (on the new Matrix). ChemiT retains copy of end-user's home directory (on the new Matrix).
  • See section below, "Important notes in what data is erased. And what data is saved."
• Monday, November 3 - old Matrix goes off-line to begin converting all nodes and transfer user data to new cluster.

Notes to get you started and keep you going

During testing, there is a the new and an old cluster are both available to you at the same time.

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• Thus, you will be able to log into two different home directories, within two completely different systems:

  • SSH to the new (Test) system at matrixtest.scheraga.chem.cornell.edumatrixtest.

  • The old system remains at scheraga.chem.cornell.edu
• Your account ID and password on the new Matrix are the same as the old Matrix.
  • See section below, "Get access to your account", within the "(2) Information relevant for testing and after testing" section.
• Continue to use the old Matrix cluster for your production research work.
• Use the new cluster ONLY to confirm it will work for you once we cut-over from the old Matrix. Do not use it for production research.
  • Interruptions to the new Matrix during this testing phase may occur at any time, with no advanced warning.

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• Storage is where non-actively used, Scheraga-related, research files belongshould be saved.
• In production (NOT DURING TESTING!), you will move results and data you want to save long term back to storage
  • REMEMBER: All date in "/storage/netID" will be deleted after this testing phase.
    • This deletion will allow us to move your current, production data from the old Matrix, when we cut-over.
• Phase One researchers only: Your /storage/netID has been carried forward from your initial testing.
  • REMINDER: It, too, will be deleted before the cut-over from the old Matrix.

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• Leave files in storage which you don't need for your jobs.
• Keeping your home directory small aids in disaster recovery for the entire group.!

ChemIT will maintain a chart to help the group track what does and does not work regarding MPI.

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The group has instructed ChemIT to make the following defaults on a new user's account:

• 50GB 10GB /home
• 50GB /storage

A new user can request a larger quota through their Group Cluster Representative (Gia, as of 10/2014.)

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