mr

package

v0.0.0-...-eb95e99 Latest Latest Go to latest Published: Mar 5, 2024 License: MIT Imports: 8 Imported by: 0

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func CallExample()

example function to show how to make an RPC call to the coordinator.

the RPC argument and reply types are defined in rpc.go.

func Worker(mapf func(string, string) []KeyValue,
	reducef func(string, []string) string)

main/mrworker.go calls this function.

type Coordinator struct {
}

func MakeCoordinator(files []string, nReduce int) *Coordinator

create a Coordinator. main/mrcoordinator.go calls this function. nReduce is the number of reduce tasks to use.

func (c *Coordinator) Done() bool

main/mrcoordinator.go calls Done() periodically to find out if the entire job has finished.

func (c *Coordinator) Example(args *ExampleArgs, reply *ExampleReply) error

an example RPC handler.

the RPC argument and reply types are defined in rpc.go.

type ExampleArgs struct {
	X int
}

type ExampleReply struct {
	Y int
}

type KeyValue struct {
	Key   string
	Value string
}

Map functions return a slice of KeyValue.