Julia: How to copy data to another processor in Julia

Question

How do you move data from one processor to another in julia?

Say I have an array

a = [1:10]

Or some other data structure. What is

Answer 1

To supplement @spencerlyon2 's answer here are some macros:

function sendtosimple(p::Int, nm, val)
    ref = @spawnat(p, eval(Main, Expr(:(=), nm, val)))
end 

macro sendto(p, nm, val)
    return :( sendtosimple($p, $nm, $val) )
end

macro broadcast(nm, val)
    quote
    @sync for p in workers()
        @async sendtosimple(p, $nm, $val)
    end
    end
end

The @spawnat macro binds a value to a symbol on a particular process

julia> @sendto 2 :bip pi/3
RemoteRef{Channel{Any}}(9,1,5340)

julia> @fetchfrom 2 bip
1.0471975511965976

The @broadcast macro binds a value to a symbol in all processes except 1 (as I found doing so made future expressions using the name copy the version from process 1)

julia> @broadcast :bozo 5

julia> @fetchfrom 2 bozo
5

julia> bozo
ERROR: UndefVarError: bozo not defined

julia> bozo = 3             #these three lines are why I exclude pid 1
3

julia> @fetchfrom 7 bozo
3

julia> @fetchfrom 7 Main.bozo
5