Walter's World

install git on CentOS 5.4

2012-03-10T12:15:00.001+08:00

login as root
yum -y install zlib-devel openssl-devel cpio expat-devel gettext-devel autoconf curl curl-devel gccwget http://git-core.googlecode.com/files/git-1.7.9.3.tar.gz
tar zxf git-1.7.9.3.tar.gz
cd git-1.7.9.3
./configure --with-curl --with-expat
make
make install

learn Javascript

2012-03-04T10:00:00.001+08:00

I am launching the learning Javascript online, hope to help people get into both programming and javascript.

http://learnjs.info

明天去哈尔滨

2011-04-20T21:17:00.001+08:00

看看

multi touch pad

2011-04-20T08:23:00.000+08:00

any one like to develop apps on PC windows for multi touch large screen?

pursue

2011-04-19T09:38:00.001+08:00

Pursue something so important that even if you fail, the world is better off with you having tried

startup

2011-04-19T09:30:00.001+08:00

Failure lets you move on, mediocrity stalls you and keeps you from reaching your potential.

-- http://onstartups.com/tabid/3339/bid/47646/Insight-From-Dropbox-Failure-Is-Not-The-Worst-Outcome-Mediocrity-Is.aspx

ec2

2011-04-19T08:26:00.002+08:00

中国到新加坡的EC2 网络好慢啊，比到美国的EC2 慢多了

network between China & Singapore's EC2 is very very slow, much slower than China to US

增加代理

2011-04-18T20:28:00.002+08:00

代理服务器

增加广告联盟

2011-04-18T20:28:00.001+08:00

百度

阿里妈妈

增加浏览器类型，操作系统类型

2011-04-18T19:52:00.001+08:00

今天眼花

2011-04-18T19:06:00.000+08:00

看得头晕

how to get more visit?

2011-04-18T17:20:00.000+08:00

just ask more people to come

I am back, again

2011-04-18T08:51:00.000+08:00

gogogo

defense to crawler

2009-12-23T14:37:00.001+08:00

Dynamic page with dynamic tags, format, etc.
Make regular expression impossible.

It works!

2009-12-21T09:47:00.001+08:00

Justin.tv’s content filtering system has detected unauthorized content on this channel and has removed this channel from Justin.tv.

VS.

Content from this channel removed at the request of the copyright holder.

just to say hi

2009-02-01T15:58:00.001+08:00

happy new year

Mac is on BSD!

2008-08-08T06:09:00.000+08:00

First time experience BSD's power on networking project. Comparing to Linux's up to 10% tcpdump package loss, BSD is ZER0!
And Mac is built base on BSD! What a amazing discovery.

blogger is unblocked?

2008-04-01T10:37:00.000+08:00

I did a search of "bad file descriptor" and found my block listing No.3!
What's more, I can open it!

Sophy

2007-11-16T20:36:00.001+08:00

Sophy
Originally uploaded by StarGirl714

Isn't my girl lovely?

I am back

2007-10-16T22:16:00.000+08:00

In fact, Blogger is back in China.

Don't use directly the sample code in your real life project

2007-10-13T10:35:00.000+08:00

most sample code doesn't handle error, the simply show you how to use a function.
of course they use their functions correctly, but they may need others' functions to make their functions run. Here is the problem, they may not use others right.

One Anti-Piracy System to Rule Them All

2007-09-22T14:20:00.000+08:00

September 21, 2007, 4:31 pm
One Anti-Piracy System to Rule Them All

By Brad Stone

Tags: Audible Magic, digital fingerprinting, MPAA, vobile

Hollywood appears to have a preliminary winner in its bake-off of anti-piracy technologies.

For the last year, the film industry, through its Palo Alto-based R&D joint venture MovieLabs, has been testing a dozen so-called “digital fingerprinting” technologies. The technology purports to scan file sharing sites, Internet providers and peer-to-peer networks to identify copyrighted material.
fingerprinting technologies“Fingerprinting Performance” (Leonard Kleinrock, 2007)

Yesterday in Los Angeles, people affiliated with the Motion Picture Association of America talked about the ongoing tests at a day-long anti-piracy workshop that the MPAA co-hosted with the University of California. In his introductory keynote at the event, UCLA professor and Internet pioneer Leonard Kleinrock showed a single slide that suggested that one of the anti-piracy filtering companies had outperformed the other 11, with the highest number of matches of infringing content and lowest number of false-positives. But professor Kleinrock and MPAA execs declined to name the participating companies or who had scored best on the test, saying that secrecy was a precondition for their participation in the tests.

Nevertheless, afterwards, executives from Santa Clara, Calif-based Vobile were crowing in the hallways of the Universal Hilton Hotel.

The two-year old company’s technology, called Video DNA, has apparently bested others from the Royal Philips Electronics, Thomson Software & Technology, and the highest profile digital fingerprinting company, the Los Gatos, Calif.-based Audible Magic, which has deals to filter video sharing sites like YouTube and Microsoft’s Soapbox.

The MPAA told Business Week in the spring that Vobile was doing “very well” on the tests.

Movie Labs stress-tested the anti-piracy systems by loading hundreds of hours of copyrighted video content into the databases of the various filters, and then by flooding them with thousands of video files, some distorted, darkened and cropped, to try to scuttle their ability to find matches.

In the next phase of the ongoing tests, MovieLabs will see if the systems can handle ever larger quantities of copyrighted works. Theoretically, adding more songs, TV shows and movies in their databases could slow down these systems—and the Internet video sites that use them— since it could take longer to find possible matches.

MovieLabs has been sharing tests results with its member movie studios since the summer. MovieLabs chief executive Steve Weinstein says the technology is ready for prime time. “In a year you’re going to see many Internet companies using it. This technology has shown its viability.”

* Link
* E-mail this

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* Internet, Music and Video, Audible Magic, digital fingerprinting, MPAA, vobile

is the rumer ture? Google will use flash to cross platform

2007-08-12T10:58:00.000+08:00

Google is going to occupy all OS platform by flash? It doesn't need its own operating system to compete with Microsoft / MacOS / Linux. But with flash, its software can run every where, also in mobile phone!

I just saw gtalk in flash..

what I did last year?

2007-07-25T20:30:00.000+08:00

C code : 13000 lines
Java code : 8000 lines

for the last week...I wrote 4000 lines C++!! and more work are coming.

don't abuse OS's cache

2007-07-18T09:29:00.000+08:00

I was writing a simple program, open a file, read the data. Each data structure is n bytes.
At first, I read it once a block (n bytes). I think it is fastest, because when I read the first block, OS should cache the whole page ( i.e. 4K) for future use. So when I fetch the next block, it doesn't need to load from hard-disk.
But when I change the reading method, each time reads 4K in to buffer, then separate from buffer, the speed boost up like 10 times.
Why? I think the reason lies in when you ask OS to load data, it will invoke system call, then Interrupt, and the OS copy the data from kernel mode to user mode for your use. This also cost time.