dmprospace

Kafka

Video Link: Apache Kafka Crash Course | What is Kafka?

Prerequisite

Knowledge
- Node.JS Intermediate level
- Experience with designing distributed systems
Tools
- Node.js: Download Node.JS
- Docker: Download Docker
- VsCode: Download VSCode

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

Hi:

perl -e 'print "hello world!\n"'

A simple filter:

perl -ne 'print if /REGEX/'

Filter out blank lines (in place):

	#
	# Needless to say, I (Volkan Ozcelik) take no responsibility, whatsoever,
	# about what will happen to your NAS when you try these.
	# When did it to mine, I observed ENORMOUS performance gain and a zen-like silence.
	#
	# +----------------------------------------------------------+
	# \| WHAT YOU ARE GOING TO DO CAN LIKELY VOID YOUR WARRANTY \|
	# \| SO PROCEED WITH CAUTION \|
	# +----------------------------------------------------------+
	#