ping

/admin/datadomain?op=ping checks the aliveness of a Dgraph and returns a lightweight message.

Because ping requests are given the highest priority and are processed synchronously (as they are received), a ping response time is independent of the number of outstanding requests in the Dgraph. The ping command does not activate an idle data domain.

The ping command returns a lightweight page that lists the Dgraph process and the current date and time, such as the following:

dgraph Web07:5556 responding at Wed Mar 27 15:35:27 2013

You can use this operation to monitor the health or heartbeat of the Dgraph, and as a health check for load balancers.