krinkle-tmp.php
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Authored by Krinkle on Jun 21 2022, 1:14 AM.

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	F35257620: krinkle-tmp.php
	Jun 21 2022, 1:14 AM

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	<?php
	/*
	[01:04 UTC] krinkle at mwmaint1002.eqiad.wmnet in ~
	$ mwscript eval.php --wiki aawiki
	> require '/home/krinkle/krinkle-tmp.php';
	Done setting 6806 keys
	Sleeping for 45 seconds...
	Checking...
	Checked 6806 keys.
	Done!
	*/

	use MediaWiki\MediaWikiServices;
	class KrinkleTmp {
	const TIME_STORED = 60;
	const TIME_SETTING = 5;
	const TIME_WAIT = 45;
	const MAX_KEYS = 10000;

	public $stored = [];
	public $wanCache;

	public function __construct() {
	$this->wanCache = MediaWikiServices::getInstance()->getMainWANObjectCache();
	}

	public function add(int $i): void {
	$key = $this->wanCache->makeGlobalKey('krinkle-tmp', 'num' . $i);
	$val = 'some_interesting_data_here' . $i;
	$this->stored[] = [
	'key' => $key,
	'val' => $val,
	'res' => $this->wanCache->set($key, $val, self::TIME_STORED),
	'time' => microtime(true),
	];
	}

	public function check(array $entry): void {
	$actual = $this->wanCache->get($entry['key']);
	if ($actual !== $entry['val']) {
	$now = microtime(true);
	$this->report($entry, $now, $actual);
	}
	}

	public function report(array $entry, $now, $actual): void {
	print sprintf("Key %s was %s after %s seconds (res: %s)\n",
	$entry['key'],
	($actual === false ? 'missing' : json_encode($actual)),
	round($now - $entry['time']),
	json_encode(entry['res'])
	);
	}

	public function execute(): void {
	$t1 = microtime(true);
	$i = 0;
	while (
	(microtime(true) - $t1) < self::TIME_SETTING &&
	$i < self::MAX_KEYS
	) {
	$this->add($i);
	$i++;
	}

	print "Done setting $i keys\n";
	print "Sleeping for " . self::TIME_WAIT . " seconds...\n";
	$this->wanCache->clearProcessCache();
	sleep(self::TIME_WAIT);

	print "Checking...\n";
	$i = 0;
	foreach ($this->stored as $entry) {
	$this->check($entry);
	$i++;
	}
	print "Checked $i keys.\n";
	print "Done!\n";
	}
	}

	$tmp = new KrinkleTmp();
	$tmp->execute();

Event Timeline

Krinkle created this paste.Jun 21 2022, 1:14 AM

Krinkle mentioned this in T278392: Storage solution for cross-datacenter tokens.Jun 21 2022, 3:52 PM

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krinkle-tmp.php
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