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The new Matrix is faster, but it is different. Learn about the differences here to reduce your aggravation.

(1) Information related to testing

How is the new Fall 2014 Matrix different than the old Matrix?

End-user reporting ticket number is INC...

Expected workflow: Who is responsible for what?

Each researcher must confirm that the applications they depend on work for them on the new Matrix.

If and when you can confirm that all works as expected:

=> notify ChemIT and include the INC... ticket number in the email. Thank you!

If you have a problem with an application or MPI issues:

=> Try working it out by yourself.
    • You should understand how and why your application works.
    • Almost all problems are not the application itself. Instead, it's almost always how a researcher has their scripts configured to use an application.
=> If you can't fix it yourself, please contact the appropriate group member; see below for who to contact. (Do not contact ChemIT for this, please.)
    • Researchers in Poland should contact Czarek. Follow his instructions, please.
    • All others should contact the group member assigned as lead tester for the application they are having problems with. Follow their instructions, please.

Notes, to get you started and keep you going

ChemIT will create a snap-shot copy of each end-user's current home directory (from the production Matrix) and place it into the end-user's storage directory (on the new Matrix).

All researchers most therefore move or copy items from their storage directory into their home directory, as they see fit.

  • Home is where currently used files belong. Keeping this small aids in disaster recovery.
    • The initial home directory is almost empty. It initially contains just the following files in order to...
  • Storage is where non-actively used, Scheraga-related, research files belong.

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

For testing, some old Matrix nodes will be moved to the new Matrix to ensure adequate computing capacity during testing. Initially 10 nodes will be made available.

Important notes in what data is erased. And what data is saved.

ChemIT will save all end-user's home directories as they build them up on the new Matrix.

ChemIT will erase all end-user's storage directories.

  • On the day we cut-over from the old Matrix to the new Matrix, ChemIT will make a final copy of user's old Matrix home directories into their new Matrix storage directories.

Timeline for testing

??: ChemIT makes a copy of the end-user's home directory (on the current Matrix) onto the end-user's storage directory (on the new Matrix), for testing purposes.

Thursday, 10/16: End-user testing starts.

??: All end-users should have logged in and started to set up their new home directories.

??: End-user testing ends.

(2) Information relevant for testing and after testing

Overall information

  • Text containing full details on the new Matrix configurations. For researchers and support staff.
    • Includes conventions, intentions, and associated technically-imposed limitations.

Get access to your account

  • ssh to ....

New user's defaults

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

  • 50GB /home
  • 50GB /storage

A new user can obtain larger quotas through their Group Cluster Representative, Gia.

 

 

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