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Main Web>Computing>LinuxCluster>ApplicationsServer (2015-02-04, WilliamSeligman) (raw view)

---+!! Nevis Applications Server

The students and teachers at Nevis require the use of many common
programs: [[http://root.cern.ch/][ROOT]], [[http://wwwinfo.cern.ch/asd/index.htm][CERNLIB]], [[http://geant4.cern.ch/][Geant4]], and so on.  It would be a waste of disk space (not to mention manpower) to install and maintain all these [[Technical][software]]
packages on each [[ListOfMachines][system]]
of the cluster individually.

Instead, all such programs are kept on one system, the [[Services][applications server]].  This system exports an applications directory
(=/usr/nevis=) to all the other systems in the cluster via [[automount]].
Any changes made to the software on the applications server is rapidly
available to the entire cluster. The current applications server is _library_.  

A general question: what programs, applications, or utilities should go on
the applications server?  The policy is this: If only one workgroup
uses a software package, then that package should be installed on that
workgroup's server and maintained by that group; for example, the
D0 group maintains the D0 analysis software on their
server, _karthur_.  If a package is used by more than one working
group, or is of general interest (such as ROOT), it's kept on the
applications server and maintained by the Nevis research computer staff.

Topic revision: r3 - 2015-02-04 - WilliamSeligman

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