The Bernese Processing Engine (BPE) is capable of utilizing networks of computers to process data. This allows for increased speed in data analysis, and is valuable for maximizing the potential of a network of computers. For the BPE to use this network, the network must satify some basic criteria. These requirements should appear obvious to the user, and are listed below.

• The computers to be used should be of the same architecture. For example: SPARC, INTEL, HP, SGI, etc. This prevents binary files (both executable and data files) from being corrupted or unusable.
• All the computers should have the file systems that will be used as work and data campaign areas mounted. If a computer can not see a file system where the campaign, or executables are located, the BPE obviously will not be able to process the data. This includes the $C, $U, $T, $P and $Q directories.
• The LOADGPS script should be in the users home area on all machines. For machines that are networked together, and have the home area mounted on all machines, this is not a concern. For networks where the users home area is different on every machine, this means that there must be a LOADGPS script on every machine, in the users home directory.
• All computers in the network should be able to automatically run remote shell operations on the other computers. When the BPE is running, it executes the shell scripts in the PCF by issuing a remote shell command. If the remote shell command can not be executed automatically, then the BPE will not work. To test this, issue the following type of command:

       fuca[braunj]$  remsh yochi ls -F
       IAMODE.
       LOADGPS*
       GPSDATA_P/
       GPSDATA_Q/
       GPSUSER40/
       fuca[braunj]$  
       

  For UNIX machines, the solution to this is to create or edit the .rhosts file in the users home directories.

These system adminstration notes are discussed in section 21.2.5 of the Bernese V4.0 manual. Refer to this section for further discussion.

Last modified Wednesday, 16-Nov-2005 20:58:00 MST

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