restart
-------
Start job scheduling, communication with jobs, and respond to all requests.
The following table shows server behaviour in the different states.
|----------------------------------------------------------------------------------|
| Server State | User Request | Task Request |Job Scheduling | Auto-Check-pointing |
|--------------|--------------|--------------|---------------|---------------------|
| RUNNING | yes | yes | yes | yes |
| SHUTDOWN | yes | yes | no | yes |
| HALTED | yes | no | no | no |
|--------------|--------------|--------------|---------------|---------------------|
The client reads in the following environment variables. These are read by user and child command
|----------|----------|------------|-------------------------------------------------------------------|
| Name | Type | Required | Description |
|----------|----------|------------|-------------------------------------------------------------------|
| ECF_HOST | <string> | Mandatory* | The host name of the main server. defaults to 'localhost' |
| ECF_PORT | <int> | Mandatory* | The TCP/IP port to call on the server. Must be unique to a server |
| ECF_SSL | <any> | Optional* | Enable encrypted comms with SSL enabled server. |
|----------|----------|------------|-------------------------------------------------------------------|
* The host and port must be specified in order for the client to communicate with the server, this can
be done by setting ECF_HOST, ECF_PORT or by specifying --host=<host> --port=<int> on the command line