Yeongpil Y. ziwon

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

google cloud shell을 이용해서 proxy 서버로 사용해서 공짜로 vpn처럼 이용하기

google cloud shell은 public ip가 없는 private ip만 있는 container입니다. 즉 외부 접근은 google client들을 통해서만 접근이 가능한데 이런 자원들을 가지고 외부에 접근 하는 proxy만드는 법에 대한 소개입니다.

MYNOTEBOOK 이 내가 접속하고 있는 chrome을 띄울 pc라고 보시면 됩니다. 물론 보통은 포트포워딩 해서 접속 할 수 있게 열어야 한다고 보시면 됩니다.

docker run -ti \

Getting started with Linux kernel development

Prerequisites

The Linux kernel is written in C, so you should have at least a basic understanding of C before diving into kernel work. You don't need expert level C knowledge, since you can always pick some things up underway, but it certainly helps to know the language and to have written some userspace C programs already.

It will also help to be a Linux user. If you have never used Linux before, it's probably a good idea to download a distro and get comfortable with it before you start doing kernel work.

Lastly, knowing git is not actually required, but can really help you (since you can dig through changelogs and search for information you'll need). At a minimum you should probably be able to clone the git repository to a local directory.

	Producer

	Setup
	bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test-rep-one --partitions 6 --replication-factor 1
	bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test --partitions 6 --replication-factor 3

	Single thread, no replication

	bin/kafka-run-class.sh org.apache.kafka.clients.tools.ProducerPerformance test7 50000000 100 -1 acks=1 bootstrap.servers=esv4-hcl198.grid.linkedin.com:9092 buffer.memory=67108864 batch.size=8196

	#!/bin/sh

	if [ "$EUID" -ne 0 ]; then
	echo -e "\nPlease run as root\neg. sudo $0 \n"
	exit
	fi

	GITHUB_USERNAME="ebal"

	cd `mktemp -d`

	sudo yum install graphviz -y
	sudo pip install aws-visualizer
	profilename=worldskills
	profileregion=us-east-1

	rm -rf target/$profilename
	mkdir -p target/$profilename/default
	mkdir -p target/$profilename/securitygroups
	mkdir -p target/$profilename/subnets

	# Download the VDI from https://cdn.amazonlinux.com/os-images/latest/
	# Doc is at http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/amazon-linux-2-virtual-machine.html
	# Be sure you have config/meta-data and config/user-data ready as per the below
	# change ec2-user's password to your password

	$ cat config/meta-data

	local-hostname: amazonlinux.onprem

	# eth0 is the default network interface enabled in the image. You can configure

	#!/bin/bash

	region="ap-northeast-2"
	all_az=()

	az_per_region=$(aws ec2 describe-availability-zones --region $region --query 'AvailabilityZones[*].[ZoneName]' --output text \| sort)
	while read -r az; do
	all_az+=($az)
	done <<< "$az_per_region"

	#!/bin/bash

	type csvsql \|\| brew instal csvkit
	type jq \|\| brew install jq
	type aws \|\| brew intall awscli

	TABLE_NAME=tmp
	TMP_FILE=${TABLE_NAME}.csv
	OUTPUT_FILE="output.csv"
	truncate -s 0 "${OUTPUT_FILE}"