xianpeng shen-xianpeng

## optimal_mtu.md

      
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                nitred
                / optimal_mtu.md
            
            
              Last active
              July 16, 2024 11:51
            
              
                Wireguard Optimal MTU
              
          
    About


I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing


On WG server, I started an iperf3 server
On WG peer, I wrote a script that does the following:

wg-quick down wg0


Edit MTU in the /etc/wireguard/wg0.conf file


## Tutorial.md

      
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                dockerlead
                / Tutorial.md
            
            
              Created
              November 16, 2020 05:04
            
              
                Wireguard on CentOS 7/8
              
          
    Set Up Your Own WireGuard VPN Server on CentOS

This tutorial is going to show you how to set up your own WireGuard VPN server on CentOS. WireGuard is made specifically for the Linux kernel. It runs inside the Linux kernel and allows you to create fast, modern, and secure VPN tunnel.
TL;DR
Prerequisites

This tutorial assumes that the VPN server and VPN client are both running CentOS operating system.
Step 1: Install WireGuard on CentOS Server and Desktop

Log into your CentOS server, then run the following commands to install WireGuard.
# CentOS 8

  
## timestamp.go
package common

import (
	"fmt"
	"time"
)

// Timestamp 自定义时间戳类型,支持Mysql的TIMESTAMP,DATETIME,DATE类型
type Timestamp int64

## config.json

{
    "log": {
        "access": "/var/log/v2ray/access.log",
        "error": "/var/log/v2ray/error.log",
        "loglevel": "warning"
    },
    "inbound": { //理论最安全的方式 ws,有条件加上TLS
        "port": 20080, //开启的端口，建议实用caddy加上TLS加密
        "protocol": "vmess",

## pyspark_udf_improvements.md

      
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                zero323
                / pyspark_udf_improvements.md
            
            
              Last active
              July 16, 2018 03:05
            
          
    PySpark UDF improvements proposal

UDF creation

Current state

Right now there are a few ways we can create UDF:

With standalone function:


## 1_simple.go
package main

import (
  "fmt"
  "reflect"
)

// Name of the struct tag used in examples
const tagName = "validate"

## install_spark_centos7.sh
#!/bin/bash
# Install Spark on CentOS 7
yum install java -y
java -version

yum install wget -y
wget http://downloads.typesafe.com/scala/2.11.7/scala-2.11.7.tgz
tar xvf scala-2.11.7.tgz
sudo mv scala-2.11.7 /usr/lib
sudo ln -s /usr/lib/scala-2.11.7 /usr/lib/scala

## m3u8-concat.sh
#!/bin/sh

# This script must be executed in the repo where
# the *.ts files are.
# It will concatenate the segments into one temp
# file which ffmpeg will reencode the audio track.
# By default the ouptup filename is output.mp4
# but can be changed by providing the name as parameter.
#
# ffmpeg is required

## securepost.go
import (
	"bytes"
	"crypto/tls"
	"crypto/x509"
	"io/ioutil"
	"net/http"
)

wechatCertPath = "/path/to/wechat/cert.pem"
wechatKeyPath = "/path/to/wechat/key.pem"

## decrypt.go
package main

import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"encoding/pem"
	"flag"
	"fmt"
	"io/ioutil"
	package common

	import (
	"fmt"
	"time"
	)

	// Timestamp 自定义时间戳类型,支持Mysql的TIMESTAMP,DATETIME,DATE类型
	type Timestamp int64

	{
	"log": {
	"access": "/var/log/v2ray/access.log",
	"error": "/var/log/v2ray/error.log",
	"loglevel": "warning"
	},
	"inbound": { //理论最安全的方式 ws,有条件加上TLS
	"port": 20080, //开启的端口，建议实用caddy加上TLS加密
	"protocol": "vmess",
	package main

	import (
	"fmt"
	"reflect"
	)

	// Name of the struct tag used in examples
	const tagName = "validate"
	#!/bin/bash
	# Install Spark on CentOS 7
	yum install java -y
	java -version

	yum install wget -y
	wget http://downloads.typesafe.com/scala/2.11.7/scala-2.11.7.tgz
	tar xvf scala-2.11.7.tgz
	sudo mv scala-2.11.7 /usr/lib
	sudo ln -s /usr/lib/scala-2.11.7 /usr/lib/scala
	#!/bin/sh

	# This script must be executed in the repo where
	# the *.ts files are.
	# It will concatenate the segments into one temp
	# file which ffmpeg will reencode the audio track.
	# By default the ouptup filename is output.mp4
	# but can be changed by providing the name as parameter.
	#
	# ffmpeg is required
	import (
	"bytes"
	"crypto/tls"
	"crypto/x509"
	"io/ioutil"
	"net/http"
	)

	wechatCertPath = "/path/to/wechat/cert.pem"
	wechatKeyPath = "/path/to/wechat/key.pem"
	package main

	import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"encoding/pem"
	"flag"
	"fmt"
	"io/ioutil"