hmartiro

ZeroMQ vs Redis

This document is research for the selection of a communication platform for robot-net.

Goal

The purpose of this component is to enable rapid, reliable, and elegant communication between the various nodes of the network, including controllers, sensors, and actuators (robot drivers). It will act as the core of robot-net to create a standardized infrastructure for robot control.

Requirements:

tenowg

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using StackExchange.Redis;

namespace CitySurvival.Redis
{

eruffaldi

#include <functional>
#include <fstream>
#include <iostream>
#include <signal.h>

/// one holder per signal type
template <int q>
struct Signal
{
	using sfx = void(int );

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

Dev-Dipesh

Redis is Database whereas RabbitMQ was designed as a message router or message-orientated-middleware (mom), so I'm sure if you look for benchmarks, you'll find that RabbitMQ will outperform Redis when it comes to message routing.

RabbitMQ is written in Erlang which was specifically designed by the telecom industry to route messages, you get clustering out of the box due to it being written in Erlang which means in a clustered environment, RabbitMQ will outperform Redis even further.

Furthermore, you get guaranteed delivery of messages due to the AMQP protocol, in other words, if the network drops while consuming the message, the consumer won't be able to say thanks for the message, so the consumer will drop the message and Rabbit will requeue the message, if you publish a message and the queue didn't say thanks to the publisher due to network problems or timeouts, Rabbit will drop the message and the publisher will keep on trying to publish the message. You can have publish retries with backoff policies, so

aopell

using System;
using System.IO;
using System.Threading;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System.Collections.Generic;

namespace DiscordBotNew.Settings
{
    public class SettingsManager

femtotrader

import requests
from pandas.io.common import urlencode
from pandas.tseries.frequencies import to_offset


ALPHAVANTAGE_API_URL = "http://www.alphavantage.co/query"
ALPHAVANTAGE_API_KEY_DEFAULT = "demo"


def _init_session(session):

0xced

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Parallel
{
    public static class EnumerableExtensions
    {

ceshine

"""A Simple Strategy Trading Two Stocks

Original code: https://blog.csdn.net/qq_26948675/article/details/80016633
Modified based on: https://www.backtrader.com/blog/posts/2018-04-22-improving-code/improving-code.html

Replaced the local CSV files with online data from IEX.

Unfortunately, this strategy is not profitable for the two stocks picked.
"""

mementum

    def __init__(self):
        self.donchian = DonchianChannels()

    def next(self):
        if self.data[0] > self.donchian.dch[0]:
            self.sell()
        elif self.data[0] < self.donchian.dcl[0]:
            self.buy()