itamarhaber’s gists

itamarhaber / 00_copy_key.lua

Last active December 14, 2023 14:14

The fastest, type-agnostic way to copy a Redis key, as discussed in https://redislabs.com/blog/the-7th-principle-of-redis-we-optimize-for-joy

	-- @desc: The fastest, type-agnostic way to copy a Redis key
	-- @usage: redis-cli --eval copy_key.lua <source> <dest> , [NX]

	local s = KEYS[1]
	local d = KEYS[2]

	if redis.call("EXISTS", d) == 1 then
	if type(ARGV[1]) == "string" and ARGV[1]:upper() == "NX" then
	return nil
	else

itamarhaber / 00-rld-start.lua

Last active April 19, 2017 20:28

Snippets accompanying Redis Lua Debugger blog post

rld.start()

itamarhaber / statsC50-T-1-pipe-75-D-100-Client1-Test3.txt

Created August 22, 2014 03:28

Unbenchmarking Redis on an EC2 instance

	1 Threads
	50 Connections per thread
	1000000 Requests per thread
	Type Ops/sec Hits/sec Misses/sec Latency KB/sec
	------------------------------------------------------------------------
	Sets 198412.70 --- --- 9.04900 28440.00
	Gets 198412.70 198412.70 0.00 9.01200 27471.00
	Totals 396825.40 198412.70 0.00 9.03000 22623.00

itamarhaber / 00 Turbo Boost WordPress with a Secure Memcached Plugin

Last active August 29, 2015 14:04

Snippets accompanying Turbo Boost WordPress with a Secure Memcached Plugin blog post (http://redislabs.com/blog/turbo-boost-wordpress-with-a-secure-memcached-plugin)

Follow these steps to deploy WordPress, Memcached Cloud and the Memcached Cloud Plugin for Wordpress on Heroku.

itamarhaber / index.html

Last active March 29, 2019 02:26

Red is Beautiful: A Visualization of Redis Commands

	<!DOCTYPE html>
	<!--
	Red is Beautiful: A Visualization of Redis Commands
	By Itamar Haber, Redis Labs
	Adopted from Mike Bostock's Zoomable Pack Layout example: http://mbostock.github.io/d3/talk/20111116/pack-hierarchy.html
	!-->
	<html>
	<head>
	<style>

itamarhaber / redis_suffix_index.lua

Created May 23, 2014 15:41

Redis suffix index function in Lua. Call with key name of the search terms set and argument to index

redis.call("zadd", KEYS[1], 1, ARGV[1]:reverse())

itamarhaber / redis_suffix_search.lua

Last active April 19, 2017 21:04

Redis suffix search function in Lua. Call with key name of search terms set and the argument to search

	local res = redis.call("zrangebylex", KEYS[1], "\[" .. ARGV[1]:reverse(), "\[" .. ARGV[1]:reverse() .. "\\xff")
	for k, v in pairs(res) do
	res[k] = v:reverse()
	end
	return res

itamarhaber / scan_del.sh

Created April 20, 2014 22:27

A bash script that deletes Redis keys by pattern using SCAN

	#!/bin/bash

	if [ $# -ne 3 ]
	then
	echo "Delete keys from Redis matching a pattern using SCAN & DEL"
	echo "Usage: $0 <host> <port> <pattern>"
	exit 1
	fi

	cursor=-1

itamarhaber / hitman.py

Created April 19, 2014 16:45

Kill idle Redis connections

	import redis
	import re

	idle_max = 300

	r = redis.Redis(host="localhost", port=6379, password=None)
	l = r.execute_command("client", "list")

	pattern = r"addr=(.?) .? idle=(\d*)"
	regex = re.compile(pattern)

itamarhaber / hitman.lua

Created April 19, 2014 16:12

Kill idle Redis connections

	local l = redis.call('client', 'list')
	local k = 0

	for r in l:gmatch('[^\n]+') do
	for c,i in r:gmatch('addr=(.+:%d+).idle=(%d+).') do
	if tonumber(i) > tonumber(ARGV[1]) then
	redis.call('client', 'kill', c)
	k = k + 1
	end
	end

Itamar Haber itamarhaber