Em-hiredis doesn't appear to support unix domain sockets

[mcorner]

From the redis docs: "The typical latency of a 1 GBits/s network is about 200 us, while the latency with a Unix domain socket can be as low as 30 us. "

It doesn't appear that URI can handle such a thing as: redis:///tmp/redis.sock

Here is a super ugly, quick and dirty, monkey patch to support it in em-hiredis. I humbly apologize for all of its overwhelming ugliness.

require 'em-hiredis'

module EventMachine module Hiredis def self.setup(uri = nil) if uri =~ /^redis:\/\/\// Client.new(uri.split(/^redis:\/\//)[1],nil,nil,nil) else url = URI(uri || ENV["REDIS_URL"] || "redis://127.0.0.1:6379/0") Client.new(url.host, url.port, url.password, url.path[1..-1]) end end end end

EventMachine.run { redis = EM::Hiredis.connect("redis:///tmp/redis.sock") }

You have to add this to your redis server's conf:

create a unix domain socket to listen on

unixsocket /tmp/redis.sock

set permissions for the socket

unixsocketperm 755

[mloughran]

If you clean this up I'm happy to accept a pull request :)

[mloughran]

Now supported in master

[niko]

How should the DB be selected when using a file socket? I found the "it's not possible to set the db or password - use initialize instead" part in the comments, but… which #initialize? And how?