davidcastellani

Keybase proof

I hereby claim:

• I am davidcastellani on github.
• I am davidcastellani (https://keybase.io/davidcastellani) on keybase.
• I have a public key whose fingerprint is C541 19B9 8D12 0A13 A55B 8642 A0DE 462D 98C9 E614

To claim this, I am signing this object:

davidcastellani

<?xml version="1.0" encoding="UTF-8"?>
<inspections version="1.0" is_locked="false">
  <option name="myName" value="Expert Level PHP" />
  <option name="myLocal" value="false" />
  <inspection_tool class="BadExpressionStatementJS" enabled="false" level="WARNING" enabled_by_default="false" />
  <inspection_tool class="CallerJS" enabled="false" level="WARNING" enabled_by_default="false" />
  <inspection_tool class="CommaExpressionJS" enabled="false" level="WARNING" enabled_by_default="false" />
  <inspection_tool class="ConstantConditionalExpressionJS" enabled="false" level="WARNING" enabled_by_default="false" />
  <inspection_tool class="ConstantIfStatementJS" enabled="false" level="WARNING" enabled_by_default="false" />
  <inspection_tool class="ContinueOrBreakFromFinallyBlockJS" enabled="false" level="WARNING" enabled_by_default="false" />

davidcastellani

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

davidcastellani

#!/bin/bash
head -n100 /dev/urandom | strings | egrep -o '([a-zA-Z0-9#%&^])' | awk '{ORS=""; print $1}' | head -c 35; echo

davidcastellani

#!/bin/bash

set -euo pipefail

### CONFIG

EMAIL_ADDR=""  # email this address if errors detected

MAX_SECONDS_BEHIND=5 # max seconds that slave can be behind master

davidcastellani

#!/bin/bash
#
# Filename : migrate
# Description : Migrate Proxmox OpenVZ container from one storage to another
# Author : James Coyle
# URL: https://www.jamescoyle.net/how-to/2863-move-proxmox-container-to-different-storage-2
# Version:
# -Date       -Author      -Description
# 20-11-2013  James Coyle  Initial
# 13-12-2017  James Coyle  Changes for LXC

davidcastellani

#!/bin/sh

#Bail if borg is already running, maybe previous run didn't finish
if pidof -x borg >/dev/null; then
    echo "Backup already running"
        exit
fi

# Setting this, so the repo does not need to be given on the commandline:
export BORG_REPO=/mnt/backup/prox01/main