Scalability at Facebook

Facebook has grown into one of the largest sites on the Internet today serving over 200 billion pages per month. The nature of social data makes engineering a site for this level of scale a particularly challenging proposition. In this presentation, I will discuss the aspects of social data that present challenges for scalability and will describe the the core architectural components and design principles that Facebook has used to address these challenges. In addition, I will discuss emerging technologies that offer new opportunities for building cost-effective high performance web architectures.

via cns.ucsd.edu

Jeff Rothschild (VP of Technology at Facebook) talks about scalability at Facebook. Jeff has a long history in IT and was founder of Veritas. Click on "click here for webcast" to see the recorded video from the lecture.

# Posted via web from opportunity__cost

If you have an iPhone, you possib...

If you have an iPhone, you possible already had a problem with syncing.  One of the most popular one is iTunes could not sync mail accounts to the iPhone "..." because the iPhone cancelled the sync.  You can desperately try it again and again, but no miracle happens.

First of all, start looking for the change that could create the problem. In  my case, it was change in SMTP server setting for one of the accounts.  I was able to nail it down pretty fast.  So how can we fix it?

1. Go ahead, and open iTunes, then open iSync, and in Preferences clear all sync history. 
2. Restart iTunes.  In the Info tab you should see mail accounts sync checked on, but no accounts shown. 
3. Restart iPhone, make sure mail application is not in the middle of something, hold Home button for several seconds, until it goes back to home screen. 
4. Find the account that supposed to cause the problem on your iPhone and delete it.
5. Click on sync in iTunes and make sure that it will replace mail account settings on iPhone.

If you're lucky enough, you're good to go. You may repeat sync process several times, if no error message shows up, but account doesn't get sync. It will, eventually.

Have fun!

(read more on Everytalks)