zmqSapply: zmqSapply
In wush978/RzmqJobQueue: A Job Queue

A high level function to parallely execute jobs on multiple machines

  zmqSapply(path, X, FUN, argv.template = list(),
    init_fun = function() { }, init_argv = list(),
    num_worker = parallel::detectCores(),
    shared_secret = "default", title = "No Title",
    redis.host = "localhost", redis.port = 6379,
    redis.timeout = 2147483647L, redis.db.index = 1L,
    redis.flush = TRUE)

`path`	character, indicate the ip and port of the `server`
`X`	a list of varying arguments. `X` is similar to the argument `X` of function `sapply`.
`FUN`	a function executed on workers. `FUN` is similar to the argument `FUN` of function `sapply`. This argument is also passed to `gen_job_set` as arugment `argv.enumerate`.
`argv.template`	see `gen_job_set`
`init_fun`	a function which is executed once after the `worker` is registered.
`num_worker`	a integer to decide how many workers will be spawn on `server`. Note that you may dynamically link and unlink workers to zmqJobQueue.
`shared_secret`	A tested feature to do a simple authorization between `server` and `worker`.
`title`	A title of this series of jobs. Displayed in the monitor.
`redis.host,`	redis.port, redis.timeout. The parameter of the backend redis server. See `init_server` and `redisConnect`.
`redis.db.index`	The index used for this series of jobs.
`redis.flush`	Whether to flush the content of redis server. See `init_server`