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@jfeilbach
jfeilbach / sysctl.conf.md
Last active April 25, 2025 12:19
10/40 Gb NIC Linux Kernel Performance Tuning for samba file server

TCP tuning

The most important TCP tuning areas since kernel 4.9 are:

  • packet pacing
  • dynamic TSO sizing
  • TCP small queues
  • BBR TCP congestion algorithm

Definitions

  • Gb = gigabit
@prasanthj
prasanthj / lirc-pi3.txt
Last active February 19, 2025 18:32
Getting lirc to work with Raspberry Pi 3 (Raspbian Stretch)
Notes to make IR shield (made by LinkSprite) work in Raspberry Pi 3 (bought from Amazon [1]).
The vendor has some documentation [2] but that is not complete and sufficient for Raspbian Stretch.
Following are the changes that I made to make it work.
$ sudo apt-get update
$ sudo apt-get install lirc
# Add the following lines to /etc/modules file
lirc_dev
lirc_rpi gpio_in_pin=18 gpio_out_pin=17
@jtblin
jtblin / udp-loader.go
Last active August 22, 2024 01:34
UDP server performance optimisation
package main
import (
"crypto/rand"
"flag"
"log"
mrand "math/rand"
"net"
"os"
"os/signal"
@mattfahrner
mattfahrner / python-paged-ldap-snippet-2.4.py
Last active January 16, 2024 12:39
This snippet allows you to do a Python LDAP search with paged controls. The latest version now supports Python "ldap" 2.4. Many thanks to Ilya Rumyantsev for doing the 2.4 legwork.
#! /usr/bin/python
import sys
import ldap
from ldap.controls import SimplePagedResultsControl
from distutils.version import LooseVersion
# Check if we're using the Python "ldap" 2.4 or greater API
LDAP24API = LooseVersion(ldap.__version__) >= LooseVersion('2.4')
@timtadh
timtadh / upsert.py
Created December 5, 2013 19:14
How to compile an INSERT ... ON DUPLICATE KEY UPDATE with SQL Alchemy with support for a bulk insert.
#!/usr/bin/env python
# Copyright (c) 2012, Tim Henderson
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# - Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
@josegonzalez
josegonzalez / access.lua
Created December 3, 2012 18:26
Simple lua file enabling oauth support for nginx via nginx-lua and access_by_lua.
- certain endpoints are always blocked
if nginx_uri == "/_access_token" or nginx_uri == "/_me" then
ngx.exit(403)
end
-- import requirements
local cjson = require "cjson"
-- setup some app-level vars
local app_id = "APP_ID"