polonskiy

# values from https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/Welcome%20to%20High%20Performance%20Computing%20%28HPC%29%20Central/page/Linux%20System%20Tuning%20Recommendations
# install (root): curl -s https://gist.githubusercontent.com/polonskiy/00a71bab32360ffcb79f/raw/10-custom.conf > /etc/sysctl.d/10-custom.conf
# apply (root): sysctl -p /etc/sysctl.d/10-custom.conf

net.ipv4.neigh.default.gc_thresh1 = 30000
net.ipv4.neigh.default.gc_thresh2 = 32000
net.ipv4.neigh.default.gc_thresh3 = 32768

net.ipv6.neigh.default.gc_thresh1 = 30000
net.ipv6.neigh.default.gc_thresh2 = 32000

polonskiy

<?php

$data = file_get_contents('php://stdin');
$password = 'ps8T0G/39oHgRehuV0TjUv2lyeA=';

$c = rkxor($data, $password);
$x = rkxor($c, $password);
var_dump($c,$x);

function rkxor($data, $password) {

polonskiy

<?php

class Runner {

    public function __construct() {
        pcntl_signal(SIGCHLD, SIG_IGN);
    }

    public function go() {
        if (pcntl_fork()) return;

polonskiy

#!/usr/bin/php
<?php

$data = file_get_contents('php://stdin');
preg_match('#^To:(.*)#i', $data, $matches);
$filename = tempnam('/tmp', trim($matches[1]) . '_');
file_put_contents($filename, $data);

polonskiy

<?php

$server = stream_socket_server('tcp://127.0.0.1:8000');
while (true) {
    $client = stream_socket_accept($server, -1);
    if (pcntl_fork() === 0) {
        stream_copy_to_stream($client, $client);
        die;
    }
    fclose($client);

polonskiy

#!/usr/bin/php
<?php

$argv += [1 => 'localhost', 2 => 11211];
$memcached = new Memcached;
$memcached->addServer($argv[1], $argv[2]);
$result = [];
foreach($memcached->getAllKeys() as $k) $result[$k] = $memcached->get($k);
var_export($result);
echo ";\n";

polonskiy

<?php

class FSStorage {

	protected $dir;

	public function __construct($dir) {
		$this->dir = $dir;
	}

polonskiy

<?php

function similar_text_shingles($texts, $shingle_len = 10, $algo = 'md5') {
	$c = count($texts);
	$total = 0;
	for ($i = 0; $i < $c; $i++) {
		preg_match_all('#\w{4,}#u', mb_strtolower($texts[$i], 'utf-8'), $matches);
		$words = $matches[0];
		$cc = count($words) - $shingle_len;
		for ($j = 0; $j < $cc; $j++) {

polonskiy

<?php

function byte2($bytes) {
	$size = array('B','KB','MB','GB','TB');
	$factor = floor(log($bytes, 1024));
	$format = $factor > 2 ? '%.1F %s' : '%u %s';
	return sprintf($format, $bytes / pow(1024, $factor), $size[$factor]);
}

polonskiy

#!/bin/bash

sleep ${1:-25}m
notify-send -i clock 'Time is up'