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How Does Google Store All of its Data?

Clustered serversEver wonder how Google manages all their information? Imagine Gmail, it has to keep track of the billions of emails that get sent out each day regardless of whether or not it is spam.

A Database?
My first thought was a database. But if you think about it, if e-mails were stored in a single database table, it would have billions of rows added each day. This just isn’t possible nor is it efficient when performing a search. So Google cannot possibly store their data in a database… at least not in the traditional MySQL sense.

After a bit of digging around, I found an interesting document written by some of Google’s main architect that describes their file system in great detail. It turns out Google uses a distributed file system spread over many machines. It offers huge storage (hundreds of terabytes) over thousands of machines and thousands of disks.

The Google File System

The advantage of this type of system is redundancy and low cost. Their servers are not top of the line but clustering many of them together creates a highly cost-effective file system.

It’s what Yahoo Does
The owner of the largest database in the world, Yahoo!, takes on a similar approach: clusters of cheap computers that form a distributed file system. In fact, if a computer breaks down, it’s usually cheaper and faster to throw away the computer and replace it with a new one than it is to repair it.

So if you have a bunch of old computers sitting around at home, don’t throw them out just yet… you could create your own distributed file system!

Courtesy: http://www.jonlee.ca

May 20, 2009 Posted by | Business, General, IT, Science, Software, Technology | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

Indian Airports on high alert after hijack warning

Airports in small cities like Jaipur, Chandigarh and Guwahati are at maximum risk.

TENSION IN THE AIR: Airports in small cities like Jaipur, Chandigarh and Guwahati are at maximum risk.

Security has been tightened at all airports following an intelligence warning.

According to intelligence agencies, there is a possibility of an Indian airplane being hijacked small airports where security checks are less stringent.

Airports in small cities like Jaipur, Chandigarh, Nashik and Guwahati are at maximum risk.

Intelligence agencies have alerted small airports and air marshals are being sent to sensitive sectors.

The Bureau of Civil Aviation Security is carrying out checks across the country. Earlier, there were rumours of a bag being found at Mumbai airport but those were found to be false.

According to some media reports, Deccan Mujahidden, a little-known organisation that claimed responsibility for Mumbai attacks, has sent an e-mail threatening to attack three Indian airports.

Intelligence agencies believe that the Deccan Mujahideen is a front created by LeT for it’s Mumbai strikes.

December 4, 2008 Posted by | Attacks, General, India Related | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment