tractor-engine

--version

Print version information, and exit.

-h, --help

Print usage summary, and exit.

--configdir=path

or -c path

Specify the directory containing tractor configuration files, default is /var/spool/tractor/config. Tractor-engine also checks for the environment variable TRACTOR_CONFIG as well.

--log=filename

Specifies the 'filename' used for logging the engine's own diagnostics. Default is stderr.

--verbose or -v

Increase logging level to from NOTICE to INFO.

--quiet   or -q

Decrease logging level from NOTICE to SEVERE.

--debug

Increase logging level to DEBUG.

--trace

Increase logging level to TRACE.

--httpdebug

Log inbound http requests

--nshippers=n

or -n nnn

Set the number of thread created to handle i/o (default=ncores).

--maxdispatch=n

or -D nnn

Restrict concurrent dispatches (and license use).

--port=n

Specify the engine's inbound connection port (default=80).

--port=addr:port

Restrict the inbound listener port to the network interface given by address - using port number port. By default the engine will listen for connections on port 80, on all interfaces. Example usage: --port=8080 or --port=127.0.0.1:9999

--supersede

Allows a newly started engine process to gracefully take over from a still-running previous engine. The new engine sends a "drain and exit" message to the old engine, then waits for the old one to exit before proceeding to become the new engine service. In drain mode, the old engine stops assigning new work to requesting blades, and then exits when all previously launched tasks are complete. Partially complete jobs will remain in the queue and will continue being processed when the new engine takes over.

--paused

Causes a newly restarted engine to immediately enter the "pause all dispatching" state. Hence no new commands will be assigned to blades until an administrator manually re-enables dispatching using the red "play" button on the Dashboard's "Gears->Admin" tab. Even when the engine restarts in --paused mode, any existing commands that are marked as still-active in the job database will still be considered active by the new engine. In those cases, the still-running blades and the new engine will communicate to sort out which of those commands are actually still running.

--startupdelay=n  

Engine simply sleeps for n seconds at startup.

--daemon

Engine auto-backgrounds in system service mode.

--pidfile=filename

In daemon mode, write final PID to filename.

--sigdfl=1

Do not override default SEGV/BUS handlers.