Redis downtime when upgrating an instance

	redis = Redis.new(:url => 'redis://localhost:6379/1')
	disconnected_at = nil
	loop do
	begin
	if disconnected_at && (size = redis.keys('testing:*').count)
	puts "reconnected_at #{Time.now}"
	puts "KeysSize: #{size}"
	break
	end
	redis.set("testing:#{Time.now.to_i}", 1)
	puts "#{Time.now}=>#{redis.keys('testing:*').count}"
	sleep 2
	rescue Redis::CannotConnectError, Errno::EINVAL
	unless disconnected_at
	disconnected_at = Time.now
	puts "disconnected_at #{disconnected_at}"
	end
	retry
	end
	end

view raw redis_downtime.rb hosted with ❤ by GitHub