My Mind..Leaks

eBay's Architecture, breaks few rules

Some intresting points from eBay architecture..

• eBay partitions every data, so eBay says there is nothing called ‘Database’ in eBay
• 16000 application servers instances running
• 400 different database instances
• At any point of time, atleast few DB instances would fail, but still the system manages to run smooth
• eBay breaks the rule of ACID ( Atomicity, Consistency, Isolation, Durability ) in database, they follow BASE ( Basically Available, Soft-state, Eventually consistent )
• eBay as a DAL ( Data Access Layer ) which actually abstracts the whole split scene in the database to the programmers.
• Programmers think there is only one Database to store. But DAL manages the data accessing in a different way.Wow!
• Lot more things…
• Finally eBay in powered by J2EE…

Interesting isn’t it..Want to know more on how eBay is working,

http://www.infoq.com/interviews/shoup-ebay-architecture

How to Calculate HRA - House Rental Allowance

Year back I remembered that there are 3 rules to calculate the HRA excemption. But the necessary of this formula arises only on every financial year beginning. Handy tool is Google to search, but I could get the formula only after scanning a couple of paras! Hence I decided to put up a sheet on my own.

Here is a Spreadsheet to Calculate the HRA allowance.

Semantic Web App, a move from 2.0 to 3.0

World got better and faster with Web 2.0. Now it’s the time where Web 3.0 started it’s race and “Alex Iskold” from RWW had written a big article on how the next generation of web will be evolved! 

The write up is fantastic and he visualized the future Web 3.0 and the need of bringing it out!

The Semantic Web means many things to different people, because there are a lot of pieces to it. To some, the Semantic Web is the web of data, where information is represented in RDF and OWL. Some people replace RDF with Microformats.  

Semantic Web Patterns: A Guide to Semantic Technologies - RWW

Another Goal Reached

Today I saw my stats counter, and it was ticking 20k+. Hurray!! It had reached another 10k mark and moving! I wrote a post on March 11 2008 about reaching my first goal, the 10,000 mark.

I didn’t expect that I would set a new goal for My Mind Leaks so soon!

My Laptop is upgraded

My Mind Leaks is now one month old

By yesterday ( Mar-16-2008 ), My Mind Leaks has completed a month successfully and exploring new ways to grow. This month it has got it’s new goals to reach and hope it would successfully outgrow the last month’s growth.

I’ve posted the first 25 days report in My Mind Leaks, as soon as it had crossed it’s goal. Now it would wait for few more days to reach it’s next goal.

The current post in My Mind Leaks, Bury Digg - Why you should get rid of Digg had started a receiving good hot comments. My readers ping me or mail me with support and offend. 

And it seems that the top post in the blogs are

• 113 useful windows run commands
• Samsung Mobile codes

Sujatha - A Leonard-Davinci

If you are asked about Rangajaran, you might not be knowing about him, but the moment I say ‘Sujatha’, you would jump to sky  and scream ‘அட நம்ம சுஜாதா’. Yeah, Sujatha, a well known personality in Tamilnadu and probably in India too.

Similar to Leonard-Davinci, Sujatha a Novelist, a writer, a poet, a screenplay writer, a critic, a science teacher, and many more. He have mixed things in right way to make the reader understand in a better way.

To be frank, he is my first virtual science teacher during my school days( guess it was my 12th ), who had made me to perceive science and world in a very different mannger. His book on Vikatan Publishers “ஏன் , எதற்கு , எப்படி?” ( literal transalation from tamil is Why, What & How? ) is a one of great book of his which answers about mor than 100+ questions on science starting from Universe to Atom.

Thou I’m not a verocious reader of books or novel, I loved his words on whatever I have read.

His recent demise had left a hard & deep scar in my heart and sure in the heart of his fans too. He was yet another episode which ended in the Tamilnadu, where the fans doesn’t want to.

Coudln’t write more…’துக்கம் தொண்டையை அடைக்கிறது’

Simply, I’m really proud that we are contemporaries!