From: "ara.t.howard" <ara.t.howard@...>
Date: 2008-11-08T03:20:45+09:00
Subject: Re: DRb + SSH


On Nov 7, 2008, at 11:06 AM, Brian Candler wrote:

> ssh lets you set up port forwarding in both directions. It works fine,
> although of course you have to set up the ssh connection yourself  
> first.

i don't *think* that's true.  certain operations in drb will cause a  
*new* connection to be opened up on a *new* port.  it's not the bi- 
directionality that kills you, it's that you cannot know which ports  
drb will use in advance.  it's been a while since i played with this  
but block methods, iirc, involve opening up a new connection on an  
unknown port

http://groups.google.com/group/ruby-talk-google/browse_thread/thread/df0582e5213b8f21/3efaa1c9e9c896b0?hl=en&lnk=gst&q=drb+ssh#3efaa1c9e9c896b0

possibly i'm wrong, but i played with this for quite a while and,  
while i could get simple methods working but not complex ones.  i  
think the testcase to use is


remote_object.each do |remote_element|
   remote_element.method
end

the block cannot be serialzed so the remote_object has to call back to  
the client on a *new* connection - and that's where things get messy.

hopefully i'm wrong.

cheers.


a @ http://codeforpeople.com/
--
we can deny everything, except that we have the possibility of being  
better. simply reflect on that.
h.h. the 14th dalai lama