Kafka vs RabitMQKafka: distributed streaming platform RabbitMQ: message broker Different Architecture Model: push & pull Storage: rabbitmq delete after ack, kafka stored on disk, and durable ordering: rabbitmq harderMar 24 · 1 min readblog.zackhu.com
D-L缩写 全称 中文 操作对象 常见命令 DDL Data Definition Language 数据定义语言 结构（表、索引等） CREATE, ALTER, DROP, TRUNCATE DML Data Manipulation Language 数据操作语言 数据（行记录） INSERT, UPDATE, DELETE DQL Data Query Language 数据查询语Mar 24 · 1 min readblog.zackhu.com
TCP vs UDPTransmission control protocol vs User datagram protocol TCP: use three handshake to establish connection between sender and receiver, more reliable, has flow control, has ordering, and guarantee data Mar 15 · 1 min readblog.zackhu.com
grep-w: match whole word -i: ignore case -v: match doesn't contain -n: show line number -o: only show part that exactly matches -A n: n lines after the occurrence -B n: n lines before the occurrence -C n:Mar 12 · 1 min readblog.zackhu.com
cat - less - morecat loads the whole file, fit well with reading small config file less is suggested for reading log, large file, less is more g - go to top G - go to bottom /keyword - search for keyword b - go backwaMar 12 · 1 min readblog.zackhu.com
