Exponential Backoff Retrying Algorithm in Ruby [modified] - Polished Ruby Programming by Jeremy Evans

ruby-exponential-backoff.rb

require 'net/http'
require 'uri'

uri = URI("http://example.local/file")
retries = 0

begin
 Net::HTTP.get_response(uri)
rescue SocketError, SystemCallError, Net::HTTPBadResponse
 retries += 1
 raise if retries > 3
 sleep(3 * (0.5 + rand/2) * 1.5**(retries-1))
 retry
end

With this approach, even with 10 retries, all retries will complete within 3 minutes.

pg-158, pg-159