xluffy xluffy

NERDTree

o.......Open files, directories and bookmarks....................|NERDTree-o|
go......Open selected file, but leave cursor in the NERDTree.....|NERDTree-go|
t.......Open selected node/bookmark in a new tab.................|NERDTree-t|
T.......Same as 't' but keep the focus on the current tab........|NERDTree-T|
i.......Open selected file in a split window.....................|NERDTree-i|
gi......Same as i, but leave the cursor on the NERDTree..........|NERDTree-gi|
s.......Open selected file in a new vsplit.......................|NERDTree-s|
gs......Same as s, but leave the cursor on the NERDTree..........|NERDTree-gs|

O.......Recursively open the selected directory..................|NERDTree-O|

Benchmarking Nginx with Go

There are a lot of ways to serve a Go HTTP application. The best choices depend on each use case. Currently nginx looks to be the standard web server for every new project even though there are other great web servers as well. However, how much is the overhead of serving a Go application behind an nginx server? Do we need some nginx features (vhosts, load balancing, cache, etc) or can you serve directly from Go? If you need nginx, what is the fastest connection mechanism? This are the kind of questions I'm intended to answer here. The purpose of this benchmark is not to tell that Go is faster or slower than nginx. That would be stupid.

So, these are the different settings we are going to compare:

Go HTTP standalone (as the control group)
Nginx proxy to Go HTTP
Nginx fastcgi to Go TCP FastCGI
Nginx fastcgi to Go Unix Socket FastCGI

Query Execution Basic

Dưới đây là mô tả chuyện gì xảy ra khi ta gửi cho MySQL một câu truy vấn, xem hình dưới

Client gửi một câu lệnh SQL cho server
Server sẽ check trong query cache. Nếu có sẵn, trả về kết quả truy vấn lưu trong cache cho client. Nếu không thì chuyển câu lệnh SQL qua bước kế tiếp
Server phân tích, tiền xử lí và tối ưu câu lệnh SQL vào một kế hoạch thực hiện.
Phần query execution engine thực thi kế hoạch ở bước 3 bằng cách tạo một cuộc gọi tới phần storage engine API
Server trả kết quả lại cho client

Basic install Funtoo

Download and boot the live CD of your choice.
Prepare your disk.
Create and mount filesystems.
Install the Funtoo stage tarball of your choice.
Chroot into your new system.
Download the Portage tree.
Configure your system and network.

How to install cGit on Nginx (Ubuntu server)

Step-by-step installtion of cGit on nginx without funky rewrite rules.

Pre-requisites

This is for

Supervisord

1. Giới thiệu

Supervisord là công cụ quản lý unix process

Một trong những ứng dụng của Supervisor là quản lý background process dạng Worker.

	#!/bin/bash
	# chkconfig: 345 20 80
	# description: Play start/shutdown script
	# processname: play
	#
	# Instalation:
	# copy file to /etc/init.d
	# chmod +x /etc/init.d/play
	# chkconfig --add /etc/init.d/play
	# chkconfig play on

	# generate by ansible

	user nginx nginx;
	worker_processes 2;
	worker_rlimit_nofile 8192;

	events {
	use epoll;
	worker_connections 8192;
	}

	add_header Strict-Transport-Security max-age=31536000;
	add_header X-Frame-Options DENY;
	add_header X-Content-Type-Options nosniff;

	ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
	ssl_ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;

	ssl_buffer_size 8k;
	ssl_prefer_server_ciphers on;

	#!/bin/sh
	# chkconfig: 2345 99 01
	# description: SoftEther VPN Server

	DAEMON=/home/vpnserver/vpnserver
	LOCK=/var/lock/subsys/vpnserver

	test -x $DAEMON \|\| exit 0

	case "$1" in