惡男日記

We love varnish

2011-08-02T16:09:00.000+08:00

[PDF] Varnish

[PDF] Varnish http accelerator

[PDF] Using Varnish VCL for webmasters

Inline C-code
Can be added between, and in functions.
Requires C-clue.
Can do almost anything.

C{
printf(”Hello World\n”);
}C

All information from phk@freebsd.org

Varnish and Multiple Backend

2011-07-18T23:09:00.001+08:00

Multiple Backendsbackend default {
  .host = "127.0.0.1";
  .port = "8080";
}
 
backend stylesheets {
  .host = "10.0.0.10";
  .port = "80";
}
 
sub vcl_recv {
  if (req.url ~ "^/stylesheets") {
    # set stylesheets backend
    set req.backend = stylesheets;
    return(lookup);
  }
 
  # set default backend
  set req.backend = default;
  return(pass);
}

Round Robin And Random Multiple Server Backend

http://highscalability.com/blog/2011/2/28/a-practical-guide-to-varnish-why-varnish-matters.html

使 CUDA wizard 支援 sm_20 (Fermi)

2011-03-20T19:03:00.001+08:00

CUDA wizard 只支援到 sm_13，這樣無法使用 Fermi 架構的特性

安裝完 CUDA wizard 之後，若是使用 VS 9.0 請修改
C:\Program Files\Microsoft Visual Studio 9.0\VC\VCProjectDefaults\cuda.rules

增加兩個片斷，請 search sm_13


<EnumValue
Value="8"
Switch="-arch compute_20"
DisplayName="2.0 (virtual) Arch"
/>

<EnumValue
Value="9"
Switch="-arch sm_20"
DisplayName="2.0 (hardware) Arch"
/>

第二段

<EnumValue
Value="8"
Switch="-code compute_20"
DisplayName="2.0 (virtual) Arch"
/>

<EnumValue
Value="9"
Switch="-code sm_20"
DisplayName="2.0 (hardware) Arch"
/>
Fermi (2.0) 並沒有 virtual 的部分，其實上面可以再縮減。
重新啟動 Virsual Studio，專案屬性應該就能選 sm_20 了。

The Chaos Tools Suite (Drupal ctools)

2011-01-14T15:40:00.002+08:00

The Chaos Tools Suite

View more presentations from merlinofchaos.

http://drupal.org/project/ctools

PyCon US 2011 & PyCon Asia Pacific 2011

2011-01-10T00:48:00.001+08:00

PyCon US 2011
http://us.pycon.org/2011/home/
(this website is based on Django and Pinax.)

PyCon Asia Pacific 2011
http://apac.pycon.org/
(this website is based on Plone.)

the precreated templates for OpenVZ

2010-12-19T15:34:00.001+08:00

Backup tools for Mac

2010-12-19T15:32:00.000+08:00

Carbon Copy Cloner
http://www.bombich.com/index.html

TCFail Snow Leopard 繁體中文系統字體修改工具

2010-12-19T15:29:00.002+08:00

CUDA Certification – Exam Scheduling Now Open

2010-12-09T01:01:00.001+08:00

CUDA Certification – Exam Scheduling Now Open

http://www.nvidia.com/object/certification.html

NVIDIA CUDA Professional Developer Program Study Guide
As part of the process of achieving the standards expected from an NVIDIA CUDA Professional Developer, all candidates are required to take a series of self-study lectures and exercises.
Please read this entire document before starting your study course.
The foundation of this training is provided by the text book, Programming Massively Parallel Processors: A Hands-on Approach, authors, David B. Kirk, Wen-mei W. Hwu.
You can also make use of podcasts in mp4 format of the lectures below; the reading assignments will help to make the lecture more productive, so please complete in advance.

Introduction to GPU Computing (60.2 MB)

Assignment please read Chapter 1 of Textbook

CUDA Programming Model (75.3 MB)

Assignment please read Chapter 2 of Textbook

CUDA API (32.4 MB)
Simple Matrix Multiplication in CUDA (46.0 MB)

Assignment please read Chapter 3 of Textbook

CUDA Memory Model (109 MB)

Assignment please read Chapter 4 of Textbook

Shared Memory Matrix Multiplication (81.4 MB)
Additional CUDA API Features (22.4 MB)
Useful Information on CUDA Tools (15.7 MB)
Threading Hardware (140 MB)

Assignment please read Chapter 5 of Textbook

Memory Hardware (85.8 MB)
Memory Bank Conflicts (115 MB)
Parallel Thread Execution (32.6 MB)
Control Flow (96.6 MB)
Precision (137 MB)

Assignment please read Chapter 6 of Textbook
Assignment please read Chapter 7 of Textbook

Please download all the documents and files that are relevant to your operating system.
As part of the study process, please ensure you also download and study the following documents:

CUDA C Programming Guide 3.0
CUDA C Best Practices Guide 3.0
CUDA C Online Documentation

Additional CUDA Programming Tools and Compiler Documentation can be found at this link:
http://www.nvidia.com/object/cuda_programming_tools.html
Please download the following additional documents:

CUDA Compiler Driver NVCC 2.0
PTX: Parallel Thread Execution ISA Version 1.2
CUDA Occupancy Calculator

Additional Course Exercises with Solutions (Supports CUDA Basics)

Exercise Instructions
Exercise files for Visual Studio
Exercise files for Mac & Linux

Additional Supporting Materials
NVIDIA is hosting a series of Webinars about the CUDA Architecture. NVIDIA staff is available during the presentations to answer questions, and the recordings are available for download.
http://developer.nvidia.com/object/gpu_computing_online.html
For technical questions please use the public CUDA developer forums:
http://forums.nvidia.com/index.php?showforum=62

解讀 Drupal 的 hook_menu()

2010-12-08T22:37:00.001+08:00

假若
$items['mypath/%objectA'] = array( ...

需要實作
function objectA_load() { return $object;}

page callback 就能取得完整 object 或是 array，而非只是 id

參考這篇
Anatomy of hook_menu

使用 php 產生 /etc/shadow 的 hashed password

2010-12-05T14:53:00.002+08:00

/etc/shadow 格式
http://www.linux.org.tw/CLDP/HOWTO/admin/Shadow-Password-HOWTO/Shadow-Password-HOWTO-2.html

<?php
// MD5
echo crypt($_GET['password'], '$1$');

SONY VAIO TZ37 無法開啟無線網路。Wireless Keeps turning itself off.

2010-12-02T22:49:00.003+08:00

手動把硬體的 wireless/bluetooth 開關設成 off，然後 on，接著就無法使用 wlan，機殼上的 wlan 的燈沒亮，無法使用 VAIO 所附的 wireless switch software 去設定 wlan (只顯示藍芽的部分)，而裝置管理員看到的 wlan 網卡又似乎很正常。重灌 intel wlan driver 也沒用。

據 SONY 光華維修中心的工程師說，bluetooth 及 wireless 的狀態，有被記錄在 CMOS 上面，但從 BIOS 又無法設定 on/off，他們猜測是我的系統有問題，以致於進系統後，wireless 又被設成 off。他們搞很久還是無法修復我的 VAIO，建議我重灌 XP。當下接上另一台 TZ37 的硬碟，wireless 卻很正常，最後，唯一能確定的是硬體方面沒問題。

後來回家，在 google 查到以下的方法，確實可行，在此留下記錄，希望可以幫到大家。

- turn the wireless and bluetooth on by the hardware switch or button or Fn+
- close the wireless switch software ( the wireless icon on the windows bar )
- hibernate the laptop (休眠)
- take off the laptop battery and take the power cable off (取下電源線及電池)
- wait for around 1 min. (等待一分鐘)
- turn the hardware switch to on- put everything back in place and start the laptop, you should be able to see the wireless working now. (打開無線網路的硬體開關，接上電源)
- make sure the bluetooth and wireless are working
- go to control panel and uninstall the wireless switch software
- restart you laptop and everything should be working fire and smooth now.

http://www.wirelessforums.org/troubleshooting/sony-vaio-wireless-network-connection-problems-52551.html

結論是，不要安裝 wireless switch software。我現在用硬體開關切換，一切正常。

Compiling with GCC on low memory

2010-12-01T11:57:00.001+08:00

# 8MB for min heapsize

CFLAGS="$CFLAGS --param ggc-min-expand=0 --param ggc-min-heapsize=8192"

Compiling with GCC on low memory VPS

Create Drupal Form elements like "DATE" element

2010-11-30T16:07:00.000+08:00

Git Client for Mac

2010-10-21T23:53:00.000+08:00

GITY
http://macendeavor.com/

GitX
http://gitx.frim.nl/

SmartGit
(free for non-commercial)
http://www.syntevo.com/smartgit/index.html

Gitti
http://www.gittiapp.com/

gitnub
http://github.com/Caged/gitnub

Drupal 用 php 讀取欄位 (CCK) 屬性

2010-09-07T11:14:00.000+08:00

<?php

$node_type = 'page';
$cck_video_field = content_fields('field_video', $node_type);
// content_fields( ) in cck/content.module

於下次重開機時，自動執行 fsck

2010-08-14T23:58:00.001+08:00

方法一：
# touch /forcefsck
# reboot

方法二：
# shutdown -rF now

sed & awk 的用法

2010-08-13T15:23:00.000+08:00

http://www.delightpress.com.tw/bookRead/skns00004_read.pdf

windows 要使用 awk, sed 的話，請下載
http://sourceforge.net/projects/unxutils/
可把 \usr\local\wbin 目錄設定到 PATH

利用 screenshots 來編寫 shell script - Sikuli

2010-08-11T10:34:00.001+08:00

Project Sikuli

macbook 闔上螢幕時，不進入睡眠

2010-07-14T11:00:00.002+08:00

可以安裝這個軟體

insomniax
http://www.macupdate.com/info.php/id/22211/insomniax

Intel 945 支援 1920x1200 (1920x1080)

2010-07-09T10:16:00.000+08:00

我的 VAIO TZ37 外接螢幕一直無法支援 1920x1200 (1920x1080) 的解析度
網路上找到這篇 hacking，修改 intel driver 的 .inf ，再重裝 driver，一試之下，果然可行!
步驟很多，要一行一行仔細看

http://komku.blogspot.com/2009/10/how-to-get-1920x1080-full-hd-resolution.html

Partitions Performance with MySQL 5.1 and 5.5

2010-06-29T13:46:00.001+08:00

MySQL 邏輯分區

Partitions Performance with MySQL 5.1 and 5.5

View more presentations from Giuseppe Maxia.

Python Code (.py) 編成執行檔

2010-06-25T16:02:00.001+08:00

使用 pyinstaller 把 .py 原始碼編成執行檔，用來保護原始碼

http://www.pyinstaller.org/%20

http://www.dev.idv.tw/mediawiki/index.php/PyInstaller%E4%BD%BF%E7%94%A8%E7%B0%A1%E4%BB%8B

在 win32 下，可以用 py2exe

轉換 vdi 成為 vmdk

2010-06-11T11:28:00.000+08:00

vboxmanage 是 virtualbox 所附的指令

最常看到的是這行指令，但轉出來的 vmdk 無法在 vmware server 1.0.x 中使用

# VBoxManage internalcommands converthd -srcformat VDI -dstformat VMDK file.vdi file.vmdk

以下指令在 virtualbox 3.1.8 產生的 vdi 轉出來 vmdk 可在 vmware server 1.0.8 中使用

# VBoxManage internalcommands  converttoraw file.vdi file.raw
# VBoxManage convertfromraw  -format VMDK file.raw file.vmdk

缺點是 raw 所佔的空間是固定大小，非動態大小

使用 macport 安裝 flvtool2

2010-05-30T22:28:00.000+08:00

http://tech.howcast.com/2008/06/tools-for-adding-keyframe-metadata-to-flash-video-flvs/

macport 沒有 flvtool2，先安裝所需要的 lib，再手動編 flvtool2 原始碼

或是用 yamdi，同樣 macport search 不到，要手動 build
http://yamdi.sourceforge.net/
在 debian 下面，yamdi 處理速度較快