Appion

h1. Setup Remote Processing

The web interface for Appion allows one to directly login to a computer and process Appion jobs. But this requires a job submission system to be installed.

The following applies to the both a web-server computer (setup earlier) and job submission system. The job submission system usually consists of a head node (main computer) and individual processing nodes (slave computers) for running jobs. As of these system can exist on an individual computer.

# [[Setup job submission server]]

# [[Install SSH module for PHP]]

# [[Configure web server to submit jobs]]

# [[Testing job submission]]

# [[Potential job submission problems]]

h2. Remote Appion Processing through ssh

A more advanced way to run appion script is done through an ssh session. This is equivalent of having you ssh into a computer and starting the appion processes.

There are two kinds of appion processes:

* The first is a single-node process that can be run on a stand-alone workstation or the head-node of a computer cluster without PBS.

* The second is a multiple-node process that requires PBS to run on the cluster.  

When you use "Just Show Command" option, it is always a single-node process, but if you run through ssh it could be either, depending on the demand of the process.  For example, imageuploader.py is typically always run as single-node process while maxlikeAlignment.py is either run on single-node with "Just Show Command" or as a PBS job submission when you run through ssh.

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[[Create a Test Project|< Create a Test Project]]

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