OpenIdea

Life is short, I write my code.

Generating unique IDs in a distributed environment

解决方案 UUID UUIDs are 128-bit hexadecimal numbers that are globally unique. The chances of the same UUID getting generated twice is negligible. 优点：性能非常高：本地生成，没有网络消耗。缺点：不易于存储：UUID太长，16...

Posted by ZYT on March 19, 2019

Flask 请求钩子

Flask 请求钩子请求钩子的作用是对请求进行预处理（ preprocessing ）和后处理（ postprocessing ）。 before_first_request before_request after_request teardown_request：处理每个结束后的异常 after_this_request

Posted by ZYT on March 12, 2019

Linux 技巧

1. vim 黏贴代码格式混乱 :set paste 2. crontab 修改默认编辑器 > select-editor 3. awk # 输出特定列 $ awk '{print $1, $4}' test.txt # 过滤记录 $ awk '$3==0 && $4=="LISTEN" {print $2} ' test.txt # 保留表头 $ a...

Posted by ZYT on March 6, 2019

Flutter

Flutter 入门

Install Flutter > git clone -b stable https://github.com/flutter/flutter.git > vim ~/.zshrc export PATH=$PATH:~/flutter/bin export PUB_HOSTED_URL=https://pub.flutter-io.cn export FLUTTER_ST...

Posted by ZYT on March 6, 2019

Nginx 基础

Nginx 系列

一、简介 NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server 二、安装 # centos sudo vi /etc/yum.repos.d/nginx.repo [nginx] name=nginx ...

Posted by ZYT on February 20, 2019

Kubernetes [1]

Kubernetes 架构设计与实现原理

一、背景 Kubernetes 的依赖于目前的两大趋势：容器技术 —— 资源隔离微服务架构二、架构设计 Master API Server : 处理来自用户的请求 Controller Manager : 管理控制器进程 Scheduler : 调度器，为 Pod 选择 Node 节点 No...

Posted by ZYT on February 18, 2019

脏数据可被研究吗？

背景当今时代，DATA 是一个非常重要的概念。坐在金融大厦的人每天在想，是否能够根据股票的 K线图发现下一次的发财机会；每个互联网大公司都在拼命收集用户的个人信息，好从中发现新的商机。因为利益的驱动，DATA 在这个时代大行其道，并且随着互联网的影响，信息爆炸式增长，并在这个时代创造出一个新的名词 BIG DATA。数据已经成为这个时代成长的基石。脏数据可被研究吗？在信息充斥的...

Posted by ZYT on February 17, 2019

分布式理论

CAP

CAP Theorem 对于一个分布式系统，不能同时满足以下三点：一致性（Consistency）可用性（Availability）分区容错性（Partition Tolerance）一致性模型弱一致性最终一致性 DNS Gossip ...

Posted by ZYT on February 15, 2019

Kafka

Kafka

1. What is Kafka? Apache Kafka is developed in Scala and started out at LinkedIn as a way to connect different internal systems. At the time, LinkedIn was moving to a more distributed architect...

Posted by ZYT on February 12, 2019

RabbitMQ

RabbitMQ

1. What is RabbitMQ？ RabbitMQ is a “traditional” message broker that implements variety of messaging protocols. It was one of the first open source message brokers to achieve a reasonable level...

Posted by ZYT on February 11, 2019