gregors

sysctl -w fs.file-max=12000500
sysctl -w fs.nr_open=20000500
ulimit -n 4000000
sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'
sysctl -w net.ipv4.tcp_rmem='1024 4096 16384'
sysctl -w net.ipv4.tcp_wmem='1024 4096 16384'
sysctl -w net.core.rmem_max=16384
sysctl -w net.core.wmem_max=16384
wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
sudo dpkg -i erlang-solutions_1.0_all.deb

gregors

Redis vs HTTP Benchmarks

See the original blog post

Results:

Name                           ips        average  deviation         median         99th %
redix_pool                   70.44       14.20 ms    ±36.07%       13.30 ms       50.60 ms
run_redix_pipeline 30.56 32.73 ms ±65.74% 47.26 ms 91.99 ms

gregors

#!/bin/bash

sudo su
apt-get --purge remove linux-sound-base alsa-base alsa-utils
apt-get install linux-sound-base alsa-base alsa-utils
apt-get install gdm ubuntu-desktop
reboot

gregors

$ du -h big.log 
967M	big.log
 
$ time cat big.log | ruby wp.rb | wc -l
   54663

real	0m36.783s
user	0m36.596s
sys	0m0.757s

gregors

<%
    # RNB, A VIM COLORSCHEME TEMPLATE
    # Author:        Romain Lafourcade (https://github.com/romainl)
    # Canonical URL: https://gist.github.com/romainl/5cd2f4ec222805f49eca

    # This template is designed to help vimmers create their own colorschemes
    # without much effort.
    #
    # You will need Ruby to generate your colorscheme but Ruby knowledge is
    # not needed at all.

gregors

# osx

# Install Nvidia web driver 
# I got the following

  http://www.nvidia.com/content/DriverDownload-March2009/confirmation.php?url=/Mac/Quadro_Certified/378.10.10.10.25.102/WebDriver-378.10.10.10.25.102.pkg&lang=us&type=GeForce

# The latest are here:
# Look for "Quadro & GeForce macOS Driver Release etc"

gregors

Keybase proof

I hereby claim:

• I am gregors on github.
• I am gregors (https://keybase.io/gregors) on keybase.
• I have a public key ASC_N59h1YW7m9VMNB9cUxRTy1r2lKO6B87M4rSQms4KVQo

To claim this, I am signing this object:

gregors

require 'rubygems'
require 'mechanize'

FIRST_NAME = 'FIRST_NAME'
LAST_NAME = 'LAST_NAME'
PHONE = 'PHONE'
EMAIL = 'EMAIL@provider.com'

PARTY_SIZE = 2
SCHEDULE_RANGE = { :start_time => '19:00', :end_time => '20:30' }

gregors

Download the certificate with:
`wget -O config/rds-combined-ca-bundle.pem http://s3.amazonaws.com/rds-downloads/rds-combined-ca-bundle.pem`
Then connect with:
`postgres://user:password@amazon-host/db_name?sslmode=require&sslrootcert=config/rds-combined-ca-bundle.pem`

References:
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_PostgreSQL.html#PostgreSQL.Concepts.General.SSL
https://github.com/jeremyevans/sequel/issues/897
http://www.postgresql.org/docs/9.3/static/libpq-connect.html#LIBPQ-CONNECT-SSLROOTCERT
http://dba.stackexchange.com/questions/77811/how-to-connect-to-an-amazon-postgresql-database-using-ssl

gregors

# install needed libs
sudo apt-get install -y build-essential
sudo apt-get install -y libxrender-dev
sudo apt-get install -y libxext-dev
sudo apt-get install -y xvfb

# get qt4.7
wget ftp://ftp.qt.nokia.com/qt/source/qt-everywhere-opensource-src-4.7.4.tar.gz

# extract the files