A lot of blogging and follow-up discussion ensued with the announcement that IE8 supports six connections per host. The blogs I saw:

Why I need to make sure to implement P3P if using iframes or using cross-site cookies?
The point is that if your application is inside iframe with parent belongs to another domain - cookies will not work for some very common configurations, for example IE 6/7 with privacy set to medium. If cookies don't work - session won't work. Therefore session turns out useless for your application under Internet Explorer. checck "Privacy in IE 6" for more details.

"Several days ago MySQL AB made new storage engine Falcon available for wide auditory. We cannot miss this event and executed several benchmarks to see how Falcon performs in comparison to InnoDB and MyISAM.
The second goal of benchmark was a popular myth that MyISAM is faster than InnoDB in reads, as InnoDB is transactional, supports Foreign Key and has an operational overhead. As you will see it is not always true."

For most system admin, we know that both myisam and innodb are stable and reliable, but sometimes, what we need is the best choice between the two. That's depends on some fators! To pick a storage engine, user must understand the pros and cons of different engines. Basically understand what INNODB and MYISAM do, and how they behave under different environment.

When picking a storage engine I go through a checklist-below is a quick list to get an idea of the thought process.

After a long time running, your file systems may bacome rotted. There would be so many abnormal files, like pipes, sockets and damaged links, etc. But no warries please, they are only  file system with some common isssues, what you need to do are often 3 steps:

- umount the file system, using DD to backup the whole patition:
# nohup dd if=/dev/sdb10 of=/mnt/172sdb10 &
- using fsck to check the issued partition, it may take some time based on how large it is.
# nohup fsck.ext3 -y  /dev/sdb10 &

Twitter started as a side project and blew up fast, going from 0 to millions of page views within a few terrifying months. Early design decisions that worked well in the small melted under the crush of new users chirping tweets to all their friends. Web darling Ruby on Rails was fingered early for the scaling problems, but Blaine Cook, Twitter's lead architect, held Ruby blameless:

Bash, which is the default shell in Linux contains a whole lot of key bindings which makes it really easy to use  The most commonly used shortcuts are listed below:
Original version of this post is here at http://linuxhelp.blogspot.com

The Exceptional Performance team from Yahoo.com identified a number of best practices for making web pages fast. The list includes 34 best practices divided into 7 categories. Check the following link for details: