SeckillSolution 秒殺 高并發 交易
https://github.com/qianshou/SeckillSolution https://blog.csdn.net/koastal/article/details/78995885 ===== https://blog.csdn.net/qq_38512763/article/details/118830903
Redis
[轉]同程鳳凰快取系統基於Redis的設計與實踐
https://www.luoow.com/dc_tw/104458719
node.js express.js sequelize redis cache
http://liu-xin.me/2017/03/24/%E8%AE%A9%E5%86%99%E5%85%A5%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E6%95%B0%E6%8D%AE%E8%87%AA%E5%8A%A8%E5%86%99%E5%85%A5%E7%BC%93%E5%AD%98/``` const to = require(‘await-to-js’).default; const Redis = require(‘ioredis’); const redis = new Redis(ooxxooxx); function Cache() {} Cache.get = async function(key) { const [err, res] = await to(redis.get(key)); if (err) {console.error(‘REDIS::Cache::get]’, err); return null;} return JSON.parse(res); }; Cache.set = async function(key, value) { value = JSON.stringify(value); const [err] = await to(redis.set(key, value)); if (err) {console.error(‘REDIS::Cache::set]’, err); } }; // // sequelize.query // async function CacheSequelizeQuery(sequelize, sql, params, redisKey) { const cacheData = await Cache.get(redisKey); if (cacheData) return cacheData; // not empty return cache data ...
node.js redis special delete del
https://github.com/luin/ioredis``` const Redis = require(‘ioredis’); const redis = new Redis(); const delScript = local all_keys = {}; local keys = {}; local done = false; local cursor = "0" repeat local result = redis.call("SCAN", cursor, "match", KEYS[1], "count", KEYS[2]) cursor = result[1]; keys = result[2]; for i, key in ipairs(keys) do all_keys[#all_keys+1] = key; end if cursor == "0" then done = true; end until done for i, key in ipairs(all_keys) do redis.call("DEL", key); end return true; ; ...
nodejs express cache redis
https://sematext.com/blog/expressjs-best-practices/``` const express = require(’express’) const app = express() const redis = require(‘redis’) const redisClient = redis.createClient(6379) async function getSomethingFromDatabase (req, res, next) { try { const { id } = req.params; const data = await database.query() // Set data to Redis redisClient.setex(id, 3600, JSON.stringify(data)) res.status(200).send(data) } catch (err) { console.error(err) res.status(500) } } function cache (req, res, next) { const { id } = req.params redisClient.get(id, (err, data) => { if (err) { return res.status(500).send(err) } ...