Condor (>= 7.0.2-4) will need to be configured in order to use these job hooks (ie the low-latency feature). To configure condor, add the following lines to your condor_config (default location: /etc/condor) file: # Startd hooks LOW_LATENCY_HOOK_FETCH_WORK = $(LIBEXEC)/hooks/hook_fetch_work.py LOW_LATENCY_HOOK_REPLY_FETCH = $(LIBEXEC)/hooks/hook_reply_fetch.py # Starter hooks LOW_LATENCY_HOOK_PREPARE_JOB = $(LIBEXEC)/hooks/hook_prepare_job.py LOW_LATENCY_HOOK_UPDATE_JOB_INFO = $(LIBEXEC)/hooks/hook_update_job_status.py LOW_LATENCY_HOOK_JOB_EXIT = $(LIBEXEC)/hooks/hook_job_exit.py SLOT1_JOB_HOOK_KEYWORD = LOW_LATENCY STARTD_JOB_HOOK_KEYWORD = LOW_LATENCY STARTER_JOB_HOOK_KEYWORD = LOW_LATENCY FetchWorkDelay = ifThenElse(State == "Claimed" && Activity == "Idle", 0, 10) STARTER_UPDATE_INTERVAL = 30 LL_DAEMON = $(SBIN)/carod DAEMON_LIST = $(DAEMON_LIST), LL_DAEMON For more information on Condor/Grid hooks please see: https://www.cs.wisc.edu/condor/manual/v7.1/4_4Job_Hooks.html The AMQP translation daemon (carod) will first look for its configuration in condor's configuration files. The following parameters can be placed in a condor configuration file to configure carod: LL_BROKER_IP: Type: IP Address Desc: The IP address of the broker that carod should talk to LL_BROKER_PORT: Type: Integer Desc: The port on $(LL_BROKER_IP) the broker is listening to LL_BROKER_QUEUE: Type: String Desc: The queue on the broker for condor jobs LL_DAEMON_IP: Type: IP Address Desc: The IP address of the interface carod use for connections LL_DAEMON_PORT: Type: Integer Desc: The port carod should use to listen for connections LL_DAEMON_QUEUED_CONNECTIONS: Type: Integer Desc: The number of allowed outstanding connections LL_DAEMON_LEASE_TIME: Type: Integer Desc: The maximum amount of time a job is allowed to run without providing an update. This must be larger than what is set for STARTER_UPDATE_INTERVAL. LL_DAEMON_LEASE_CHECK_INTERVAL: Type: Integer Desc: How often to check for lease expiration If the configuration is not found in condor's configuration files, then carod will look in /etc/condor/carod.conf. Then edit the job hook configuration file to communicate with carod. See /usr/share/doc/condor-job-hooks-1.0/INSTALL for details. Once the configuration is complete, restart condor. To use the low-latency feature, configure condor as mention aboved, ensure qpid is running, and start carod. To submit jobs, send AMQP messages to the AMQP queue defined in the /etc/condor/carod.conf configuration file, with the classad information stored as headers in the application_headers field.