Bambarbia Kirkudu

Independent Consultant (Toronto, Canada) specializing in Lucene, Hadoop, HBase, Nutch, SOLR, LingPipe, GATE, Data Mining, Search Engines, WebLogic, Oracle, Liferay Portal, Java, J2EE, SOA, and more. Master in MATH, Moscow State University n.a.Lomonosov

Friday, June 22, 2007


Dynamic robots.txt

I found a lot of stupidness... first at Matt Cutts blog (only in comments!), then at WMW:

First: it is cloaking. I don't like this word just because we indeed need to provide different content for different HTTP headers, including User-Agent string. For instance, for cell-phone users ;)

Some so-called 'experts' in SEO area advice to have dynamic robots.txt, and even to dynamically overwrite static .htaccess file!

This is a real sheet.

Scalability, security, and more. Can dynamic service handle HEAD request? Redirects from another site? 304? 403? What about 5xx 'Service Unavailable'? Really stupid.


Thursday, June 21, 2007


AJAX... JSF... Portlet... Flex!

After spending a month with DOJO, another month with Apache Cocoon, finally with LifeRay, next final discovery was LifeRay, some hacks with WebLogic Portal, then (finally?) playing with Tapestry, Facelets, Ruby & Co., Trails & Grails & Friends, ... ... ...

I can tell you: do not waste your time with AJAX! JSF! Portals!!!

May be Facelets are very good; but abstract JSF is still a big headache.

It started from AJAX.

I needed very rapid tool for front-end development, and I even studied Eclipse RCP with SWT, JFace...

Part 1. AJAX

What I learned: AJAX is a hack. If there is good framework, use it. The best is GWT (Google Web Toolkit), just because Google's team is the best (do you know Joshua Bloch? He left SUN and joined small startup called Google in 2004! Google has 11000 employees now.)

AJAX is a hack... different browsers, different implementations of JavaScript. And not only ECMA! Such trivial things as 'padding' and 'margin' work differently in IE and Mozilla.

AJAX will die. Quickly. I started developing FLEX-based Mail Client for SCALIX.

Part 2. FLEX

It is very attractive. Bruce Eckel, author of "Thinking in Java", even has a small chapter related to using FLEX as a front-end to Java.

I spent just 2 days to learn everything needed for rapid (and even very rapid) Adobe FLEX & ActionScript development. Final hours with cycle of Cairngorm related articles were enough to feel absolutely comfortable with new language concepts.

Adobe sells Flex Builder for about $750, and it includes single-CPU license for LiveCycle Data Services. More than enough to start with! I installed it on Tomcat; of course I needed also open-source implementations of JMS etc.

I am going to develop FLEX-based front end for Tokenizer search engine, it will run at The Market Spy (possibly... I hope)

It's impossible to compare it with AJAX... AJAX promised good performance improvements over traditional HTML-request-response model, unfortunately it is a fake. In a real world you are forced to download a lot of JavaScript code which run very slow, you are forced to make this code dynamically generated on Server so that it is not HTTP-cached, ...

Look some cool staff at!!!
Can you find anything similar AJAX-based? JSF? JFace?

Part 3. See you at The Market Spy!


Thursday, June 7, 2007


Bambarbia Kirkudu: MySQL: InnoDB Outperforms SolidDB in Real World Application

Bambarbia Kirkudu: MySQL: InnoDB Outperforms SolidDB in Real World Application


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