Ægir Örn Símonarson agirorn

Yesterday I upgraded our running elasticsearch cluster on a site which serves a few million search requests a day, with zero downtime. I've been asked to describe the process, hence this blogpost.

To make it more complicated, the cluster was running elasticsearch version 0.17.8 (released 6 Oct 2011) and I upgraded it to the latest 0.19.10. There have been 21 releases between those two versions, with a lot of functional changes, so I needed to be ready to roll back if necessary.

Our setup:

elasticsearch

We run elasticsearch on two biggish boxes: 16 cores plus 32GB of RAM. All indices have 1 replica, so all data is stored on both boxes (about 45GB of data). The primary data for our main indices is also stored in our database. We have a few other indices whose data is stored only in elasticsearch, but are updated once daily only. Finally, we store our sessions in elasticsearch, but active sessions are cached in memcached.

People

`:bowtie:`	😄 `:smile:`	😆 `:laughing:`
😊 `:blush:`	😃 `:smiley:`	☺️ `:relaxed:`
😏 `:smirk:`	😍 `:heart_eyes:`	😘 `:kissing_heart:`
😚 `:kissing_closed_eyes:`	😳 `:flushed:`	😌 `:relieved:`
😆 `:satisfied:`	😁 `:grin:`	😉 `:wink:`
😜 `:stuck_out_tongue_winking_eye:`	😝 `:stuck_out_tongue_closed_eyes:`	😀 `:grinning:`
😗 `:kissing:`	😙 `:kissing_smiling_eyes:`	😛 `:stuck_out_tongue:`

Awesome Electronic and Hardware platform

A curated list of amazingly awesome Electronic and Hardware platform #WoT #IoT #M2M

Awesome Electronic and Hardware platform

Thoughts on habits + practices for giving/receiving feedback effectively, as well as creating systems that get better at this with time

Writeups

Company Blogs
- Plaid: https://blog.plaid.com/building-an-inclusive-code-review-culture/
- Vox: https://product.voxmedia.com/2018/8/21/17549400/kindness-and-code-reviews-improving-the-way-we-give-feedback
Sandya Sankarram
- https://medium.com/@sandya.sankarram/unlearning-toxic-behaviors-in-a-code-review-culture-b7c295452a3c
Michael Lynch

	#!/usr/bin/env bash
	# MIT © Sindre Sorhus - sindresorhus.com

	# git hook to run a command after `git pull` if a specified file was changed
	# Run `chmod +x post-merge` to make it executable then put it into `.git/hooks/`.

	changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"

	check_run() {
	echo "$changed_files" \| grep --quiet "$1" && eval "$2"

	# Karma configuration
	# Generated on Tue Aug 20 2013 16:26:25 GMT-0400 (EDT)

	module.exports = (config) ->
	config.set

	# base path, that will be used to resolve all patterns, eg. files, exclude
	basePath: '..'

	# frameworks to use

	/*
	* You can also just do "node --trace-warnings app.js"
	*/
	process.on('unhandledRejection', (rejection) => {
	console.log('Unhandled promise rejection warning:');
	console.log(rejection);
	});

	#!/usr/bin/env bash

	# Steps:
	# 1 Remove node_modules and yarn.lock from project root
	# 2 Remove node_modules from all folders under packages
	# 3 Install all the node_modules
	rm -Rf node_modules yarn.lock \
	&& find packages/ \
	-name node_modules \
	-maxdepth 2 \