oxyc

Overview

Syncing an Ethereum node is largely reliant on latency and IOPS, I/O Per Second, of the storage. Budget SSDs will struggle to an extent, and some won't be able to sync at all. IOPS can roughly be used as proxy of / predictor for latency. Measuring latency directly is arguably better.

This document aims to snapshot some known good and known bad models.

The drive lists are ordered by interface and then by capacity and alphabetically by vendor name, not by preference. The lists are not exhaustive at all. @mwpastore linked a filterable spreadsheet in comments that has a far greater variety of drives and their characteristics. Filter it by DRAM yes, NAND Type TLC, Form Factor M.2, and desired capacity.

For size, 4TB is a very conservative choice. The smaller 2TB drive should last an Ethereum full node until at least sometime 2026, with the [pre-merge history expiry](https://hackmd.io/@hBXHLw_9Qq2va4pRt

How to Change Open Files Limit on OS X and macOS

This text is the section about OS X Yosemite (which also works for macOS Sierra) from https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/#mac-os-x

The last time i visited this link it was dead (403), so I cloned it here from the latest snapshot in Archive.org's Wayback Machine https://web.archive.org/web/20170523131633/https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/

Mac OS X

To check the current limits on your Mac OS X system, run:

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	name: Deploy

	on: [push]

	jobs:
	deploy_staging:
	name: deploy to staging
	runs-on: ubuntu-latest
	container:
	image: itinerisltd/tiller:latest

	// ==UserScript==
	// @name Convert post to Gutenberg
	// @namespace http://tampermonkey.net/
	// @version 0.1
	// @description Convert Wordpress classic posts to Gutenberg layout
	// @author Micah Engle-Eshleman
	// @include /^https:\/\/subdomain\.domain\.com\/wp-admin\/post.php\?post=\d+&action=edit/
	// @grant none
	// ==/UserScript==

	<?php

	namespace App\Blocks;

	use \TinyPixel\BlockCompose\Composer;
	use \TinyPixel\BlockCompose\Attribute;
	use \TinyPixel\BlockCompose\Traits;

	class Banner extends Composer
	{

	// ----
	// Sass (v3.4.20)
	// Compass (v1.0.3)
	// ----

	// See in action @ http://www.sassmeister.com/gist/43a347037bf0afa447ae

	///
	// Mixin to make-up for bad VH support in iOS
	// @param {string} $property - CSS Property to style

	# Redirect visitors who request the root domain path (e.g. www.mywebsite.ch) to the appropriate language version
	# Fallback to English version if no matching browser language defined
	# Based on language version being at e.g. www.mywebsite.ch/de/
	# This has no effect on any subpaths of the website, and therefore has no effect on e.g. WordPress admin.
	# Using a 302 temporary redirect header stops the redirection from being cached in the browser.

	# language is ES-MX (Mexico)
	RewriteCond %{HTTP:Accept-Language} ^es-mx [NC]
	RewriteRule ^$ /mx/ [L,R=302]

	<?php
	/**
	* Plugin Name: WooPAM: Woo Product Attributes Modifier
	* Description: Bulk update 'custom meta product attributes' to 'taxonomy product attributes' in WooCommerce. Supports the GET variables, like: woopam_mode=run&woopam_from_attribute_meta=colour&woopam_to_attribute_tax=pa_colour&woopam_keep_attribute_meta&woopam_posts_per_page=10&woopam_paged=0&woopam_post_type=product&woopam_post_status=any. WARNING: Backup DB first!!!
	* Plugin Author: birgire
	* Author URI: https://github.com/birgire
	* Plugin URI: https://gist.github.com/birgire/0ed300ae4436fcaf508c
	* Version: 1.0.0
	* License: GPL2+
	* Text Domain: woopam

	# Hello, and welcome to makefile basics.
	#
	# You will learn why `make` is so great, and why, despite its "weird" syntax,
	# it is actually a highly expressive, efficient, and powerful way to build
	# programs.
	#
	# Once you're done here, go to
	# http://www.gnu.org/software/make/manual/make.html
	# to learn SOOOO much more.