ecFlow's documentation is now on readthedocs!

Please go to https://ecflow.readthedocs.io/en/latest/index.html

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The command ecFlow_server is used to start an ecFlow_server using the default port number or that defined by the variable ECF_PORT.

cd ECF_dir1
ecflow_server &# start ecFlow with default port3141


Multiple ECFs can be run on the same host using different port numbers. There are two mechanisms for specify the port number:

  • Using arguments on the command line. i.e. ecflow_server --port=3141
  • Using Environment variable. ECF_PORT

If both are specified the command line argument takes precedence

cd ../ECF_dir2
ecflow_server –-port=3142& # start ecFlow with port number 3142
cd ../ECF_dir3
export ECF_PORT=3143
ecflow_server &# starts ecFlow with port number of 3143


Note: the ECFs are started in different directories so that the output and checkpoint files are not overwritten
Adding a new server to ecflowview adds the definition to the file ~/.ecflowview/servers. This can be modified directly.
You cannot start two ecFlow servers on the same machine with the same port number. To simplify users wanting their own ecFlow servers we have a script ecflow_start .sh(an example is included in the latest releases of ECF) that sets up an ecFlow server using a port number based on the users own unique user ID
You can check what port numbers are being used, with netstat: To list all open network ports on your machine, run netstat -lnptu.
Here is a breakdown of the parameters:
•l - List all listening ports •n - Display the numeric IP addresses (i.e., don't do reverse DNS lookups •p - List the process name that is attached to that port •t - List all TCP connections •u - List all UDP connections
Figure 7 1 Viewing new ECFLOW servers with ecflowview.

When using non-default ecFlow servers, ecflowview needs to be configured to recognise the port used. Opening the edit-preferences under ecflowview and selecting the servers tab you can describe your new ecFlow server to ecflowview.
Adding a new server to ecflowview adds the definition to the file ~/.xecfrc/servers. This can be modified directly.
It is a good idea to use a start up script that automatically sets up a unique port number.

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