John Joseph Bachir <[email protected]> wrote:
> If I'm running two rails apps on the same server using Unicorn, I have
> to run two instances of Unicorn, right?
I'm not sure if Rails (or any other frameworks) has issues, but plain
Rack applications will work. Rack lets you do something like this in
config.ru:
--------------------- config.ru ------------------
map("http://foo.example.com/";) do
run FooApp.new
end
map("http://bar.example.com/";) do
run BarApp.new
end
----------------------- 8< -----------------------
Both applications need to be able to work from the same working
directory, though.
> If so, then here's a place where passenger might win in terms of
> memory use, as the rails code will be loaded into memory twice, right?
It's all dependent on whether Rails lets you run two apps in the same
process or not (in which case Unicorn can do it).
The following example is pretty ugly, but lets you split your workers
between two applications:
----------------- unicorn.conf.rb -----------------
preload_app false
worker_processes 2 # need more than one
after_fork do |server,worker|
$unicorn_worker_nr = worker.nr
end
---------------------------------------------------
--------------------- config.ru ------------------
if ($unicorn_worker_nr % 2) == 0
run FooApp.new
else
run BarApp.new
end
----------------------- 8< -----------------------
--
Eric Wong
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