Wednesday, December 22, 2010

How wrong we are to foresee future

As I was wandering in internet from one article to another, I stumbled upon a very interesting discussion between Andrew S. Tanenbaum
and
Linus Torvalds. Here is the discussion. Discussion took place early 92 and it is about Tanenbaum attacking the new kid on the block (read Linux) and Linus defending his brain child. I am quoting some excerpts from that discussion because it depicts how wrong Tanenbaum was to foresee the future.

"While I could go into a long story here about the relative merits of the two designs, suffice it to say that among the people who actually design operating systems, the debate is essentially over. Microkernels have won. MINIX is a microkernel-based system. LINUX is a monolithic style system. This is a giant step back into the 1970s."

"MINIX was designed to be reasonably portable, and has been ported from the Intel line to the 680x0 (Atari, Amiga, Macintosh), SPARC, and NS32016. LINUX is tied fairly closely to the 80x86. Not the way to go."

"I still maintain the point that designing a monolithic kernel in 1991 is a fundamental error. Be thankful you are not my student. You would not get a high grade for such a design :-)" -> I guess Mr. Tanenbaum would be more than proud to find such a brilliant student. Alas!!!

"When MS-DOS was written specifically for the 8088 ten years ago, this was less than brilliant, as IBM and Microsoft now only too painfully realize. Writing a new OS only for the 386 in 1991 gets you your second 'F' for this term. But if you do real well on the final exam, you can still pass the course." -> How wrong, how wrong?

As you can see how wrong his predictions were. He developed a portable system but what did he get? x86 is the clear winner and all those SPARC and other architecture are nowhere. His boasting about micro-kernel is also short lived because Linux is one of the major OS out there having monolithic kernel. As another fact most popular OS (read Windows) on planet is hybrid-kernel based OS which is closer to monolithic kernel.

All this wrong predictions remind me of a quote by Bill Gates-

"We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction."

Monday, December 20, 2010

Future of Silverlight

Microsoft did not give proper focus to Silverlight sessions in PDC 2010. Apart from this the on going work on HTML 5 standard and Microsoft’s commitment to make IE9 a HTML 5 compliant browser has raised questions on future of Silverlight. There are many capabilities which were exclusive to Silverlight are part of HTML 5 standard. I found somewhat convincing answer to future of Silverlight on Silverlight team’s blog.

However if you are thinking that confusion is all cleared now then read some words from Bob Muglia, the Microsoft President in charge of the company’s server and tools business.

Live in confusion!!!

Thursday, December 16, 2010

Using soapUI to consume a WS-Addressing service

Today I downloaded the latest verion (3.6.1) of soapUI and wanted to test a WCF service. I added the service reference to soapUI and it was able to find WSDL but when I tried to execute the service, it gave me following error:

<s:Reason>
<s:Text xml:lang="en-GB">The message with To '' cannot be processed at the
receiver, due to an AddressFilter mismatch at the EndpointDispatcher. Check
that the sender and receiver's EndpointAddresses agree.</s:Text>
</s:Reason>

I quickly googled and found that somebody had already hit this problem and he has dissected the problem properly and then provided solution here. Hope this can help you as well.