rebyn’s gists

rebyn / aws-auth-cm.sh

Created March 4, 2020 15:07 — forked from pmatv/aws-auth-cm.sh

Map IAM group to EKS ConfigMap

	#!/usr/bin/env bash

	set -o errexit
	set -o nounset
	set -o pipefail

	IAM_GROUP=${1:-admins}
	EKS_ROLE_ARN=${2:-arn:aws:iam::111122223333:role/eks-node-role}
	RBAC_GROUP=${3:-system:masters}

rebyn / large_redshift_tables.sql

Created July 19, 2016 15:50 — forked from subelsky/large_redshift_tables.sql

Quick SQL command to find large tables in redshift

	-- based on http://stackoverflow.com/questions/21767780/how-to-find-size-of-database-schema-table-in-redshift
	SELECT name AS table_name, ROUND((COUNT(*) / 1024.0),2) as "Size in Gigabytes"
	FROM stv_blocklist
	INNER JOIN
	(SELECT DISTINCT id, name FROM stv_tbl_perm) names
	ON names.id = stv_blocklist.tbl
	GROUP BY name
	ORDER BY "Size in Gigabytes" DESC

rebyn / install.sh

Created February 29, 2016 10:01 — forked from wdullaer/install.sh

Install Latest Docker and Docker-compose on Ubuntu

	# Ask for the user password
	# Script only works if sudo caches the password for a few minutes
	sudo true

	# Install kernel extra's to enable docker aufs support
	sudo apt-get -y install linux-image-extra-$(uname -r)

	# Add Docker PPA and install latest version
	sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
	sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

rebyn / progress_bar.rb

Created January 2, 2016 18:10 — forked from kuntoaji/progress_bar.rb

Simple progress bar script without Gem using Ruby.

rebyn / cmd.sh

Created December 7, 2015 17:13 — forked from kelvinn/cmd.sh

Example of using Apache Bench (ab) to POST JSON to an API

	# post_loc.txt contains the json you want to post
	# -p means to POST it
	# -H adds an Auth header (could be Basic or Token)
	# -T sets the Content-Type
	# -c is concurrent clients
	# -n is the number of requests to run in the test

	ab -p post_loc.txt -T application/json -H 'Authorization: Token abcd1234' -c 10 -n 2000 http://example.com/api/v1/locations/

rebyn / bkadb-data-gen.sh

Created December 5, 2015 21:25 — forked from cmerrick/bkadb-data-gen.sh

Better Know a Database - Redshift Load Data Formats

	#!/bin/sh
	# OS: Ubuntu 14.01
	# Generate data - produces about 200GB on disk, takes a while

	DATADIR=tpch-dbgen
	SCALE=1000

	git clone https://github.com/electrum/tpch-dbgen.git
	cd $DATADIR && make && ./dbgen -f -v -C 16 -S 1 -s $SCALE && cd -

rebyn / Uncached DNS, new connection

Created October 12, 2015 15:05 — forked from adamkaplan/Uncached DNS, new connection

Use Curl to identify bottlenecks in your service layers.

	# SSL request to hostname that is not in DNS

	> curl -o /dev/null -w @curlformat https://beta.finance.yahoo.com
	% Total % Received % Xferd Average Speed Time Time Time Current
	Dload Upload Total Spent Left Speed
	100 255k 0 255k 0 0 233k 0 --:--:-- 0:00:01 --:--:-- 233k

	Size: 261255
	DNS: 0.522
	Connect: 0.536

rebyn / latency.txt

Created September 24, 2015 08:06 — forked from jboner/latency.txt

Latency Numbers Every Programmer Should Know

	Latency Comparison Numbers
	--------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns
	Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
	Read 4K randomly from SSD* 150,000 ns 0.15 ms

rebyn / 1_singlehost.go

Last active September 17, 2015 07:14 — forked from justinas/1_singlehost.go

Go middleware samples for my blog post. http://justinas.org/writing-http-middleware-in-go/

Tu Hoang rebyn