What is web2.0 ?

What is web 2.0 ? it is nothing actually. However somebody like those terms without definition very much , because it give a lot of space for them to develop, especially Chinese , they like fuzzy things very much.

Lee's answer is the very correct.

BERNERS-LEE: ".... Web 1.0 was all about connecting people. It was an interactive space, and I think Web 2.0 is of course a piece of jargon, nobody even knows what it means. If Web 2.0 for you is blogs and wikis, then that is people to people. But that was what the Web was supposed to be all along."

High Dynamic Range Photography

A digital photo technique that create fantastic photos!
It combine different exposure photo to create a more wide range exposure photo
here are a example from "Cambridge in Color" .

Google Server Specification

Google like to use cheap PC but many (more than 10 thousnad)
1 Rack contain 40 - 80 x86 custom made rack mount
CPU : Intel Celeron 533 -1.4GHz PII
HD: 80GB (indexer will use lesser)
interface : 100Mbps Ether port , GigaByte ethernet for inter rack connection.

I like those points:

Software reliability.We eschew fault-tolerant
hardware features such as redundant
power supplies, a redundant array
of inexpensive disks (RAID), and highquality
components, instead focusing on
tolerating failures in software.
• Use replication for better request throughput
and availability. Because machines are
inherently unreliable, we replicate each
of our internal services across many
machines. Because we already replicate
services across multiple machines to
obtain sufficient capacity, this type of
fault tolerance almost comes for free.
• Price/performance beats peak performance.
We purchase the CPU generation that
currently gives the best performance per
unit price, not the CPUs that give the
best absolute performance.
• Using commodity PCs reduces the cost of
computation. As a result, we can afford to
use more computational resources per
query, employ more expensive techniques
in our ranking algorithm, or search a
larger index of documents.

They get machine quotation form this http://www.verari.com/

Ref: http://labs.google.com/papers/googlecluster-ieee.pdf

Things I like to to

Swimming in morning, reading in a bookstore and have a cup of coffee. I do all these in this moring in Chinese University , what great start of a week.....

Stephen Hawking ask Question in Yahoo answer

Stephen Hawking play Yahoo Ansewer also!
he ask this question.
Yahoo! Answers - How can the human race survive the next hundred years?