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yang-wei / README.md
Last active January 13, 2021 15:30
How to check file descriptors on Linux

system wide

> cat /proc/sys/fs/file-max
13032310

> cat /proc/sys/fs/file-nr
25696   0       13032310
@yang-wei
yang-wei / RedisClusterWithLettuce.scala
Last active November 18, 2020 11:43
lettuce Cannot retrieve initial cluster partitions from initial URIs from elasticache configuration endpoint
trait RedisCluster {
def connect: Throwable \/ StatefulRedisClusterConnection[String, String]
}
class RedisClusterWithLettuce(host: String, port: Int) extends RedisCluster {
private val client = RedisClusterWithLettuce.build(host, port)
def connect: Throwable \/ StatefulRedisClusterConnection[String, String] = {
\/.fromTryCatchNonFatal {
@yang-wei
yang-wei / README
Last active November 8, 2020 10:16
io.netty.channel.ConnectTimeoutException: connection timed out
```
❯ redis-cli -c -h localhost -p 6379
localhost:6379> cluster nodes
2f7fd4b118aec5f0d0b10a16006815098ae89e9c 192.168.48.2:6379@16379 myself,master - 0 1604830164000 1 connected 0-5460
10f1bbb2e194af0fd389253742f1cdd312dc0556 192.168.48.2:6384@16384 slave f53b0c7e1fffee2b20e7c8886075f545c50f1e9b 0 1604830165755 6 connected
ef35b6133ec1be37e8989ac4c9b3ebecf75cd612 192.168.48.2:6383@16383 slave dbb28f3dd2fa0462e7bac0ee3aef1ef9a59a1ba3 0 1604830167000 5 connected
dbb28f3dd2fa0462e7bac0ee3aef1ef9a59a1ba3 192.168.48.2:6380@16380 master - 0 1604830166271 2 connected 5461-10922
f53b0c7e1fffee2b20e7c8886075f545c50f1e9b 192.168.48.2:6381@16381 master - 0 1604830167299 3 connected 10923-16383
eeb51c67dbf497953c1fe30b7ffb7aaeabe0dc27 192.168.48.2:6382@16382 slave 2f7fd4b118aec5f0d0b10a16006815098ae89e9c 0 1604830166000 4 connected
```
@yang-wei
yang-wei / phpbrew-config.md
Created October 28, 2015 04:44
How to use switch PHP(using phpbrew) version in nginx config 
php -v
PHP 5.6.3 (cli) (built: Oct 28 2015 09:47:41)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2014 Zend Technologies

But this only changes in CLI. You have to tweak you nginx(same for apache) to make it works. Nginx will still using the native PHP-FPM.

> ps aux | grep php-fpm
@yang-wei
yang-wei / keyValuePairs.elm
Last active May 1, 2019 05:36
Json.Decode example
import Graphics.Element exposing (Element, show)
import Task exposing (Task, andThen)
import Json.Decode exposing (Decoder, int, string, object3, (:=), at, keyValuePairs)
import Http
type alias Languages =
List (String, Int)
mailbox =
@yang-wei
yang-wei / BarChart.jsx
Created August 7, 2016 10:41
react d3 (v4.0) stacked bar chart using rd3
'use strict';
import { scaleOrdinal, schemeCategory20c } from 'd3-scale';
import React from 'react';
module.exports = React.createClass({
displayName: 'BarChart',
propTypes: {
@yang-wei
yang-wei / README.md
Last active August 8, 2018 01:19
PHP extension ext-memcached * is missing from your system 
➜  admin git:(master) phpbrew --version
phpbrew - 1.23.1
cliframework core: 2.5.4
➜  admin git:(master) php -v
PHP 5.6.30 (cli) (built: Aug  7 2018 17:48:36)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
➜  admin git:(master) which php
/Users/l-wei/.phpbrew/php/php-5.6.30/bin/php
@yang-wei
yang-wei / README.md
Created August 4, 2018 04:12
go upload 
go run server.go

curl

curl -v -H 'Content-Type: multipart/form-data' -F "uploadfile=@./sample_video.mp4" -k http://localhost:8080/upload
@yang-wei
yang-wei / xml2json.php
Created May 15, 2014 08:24
<?php
header('Content-Type: application/json');
//$xmlfile = 'xml/EIT_00002_20140507.xml';
function xml2json($file) {
if (file_exists($file)) {
$xml = simplexml_load_file($file);
$date = $xml->EventDate;
@yang-wei
yang-wei / index.html
Created November 27, 2014 02:29
React JS Component LifeCycle http://jsfiddle.net/yangweilim/kb3gN/8159/
<div class="container">
<div class="row">
<div class="col-xs-12">
<button class="btn btn-primary" onClick="render()">Render</button>
<button class="btn btn-danger" onClick="unmount()">Unmount</button>
</div>
<br/><br/>
<div class="col-xs-12" id="react"></div>
</div>
</div>