QCon London 2012 – Retrospective
Posted by Mihailo Lalevic in Architecture, Conference, Database on April 2, 2012
After couple of weeks of letting things settle a bit after QCon London 2012 has anything stuck with me? Have I learned anything? Was it worth? What did I learn and did it prompt me to extend my knowledge in certain areas?
My response would be: Hell yeah! to all of the above – I learned loads, met lots of interesting people, exchanged ideas with people working on different projects, in differently organized teams – and it did prompt me to action! My TODO list is gigantic with things to check out, try out, read, consider as an alternative, question. Quite frankly, that’s what you want after a conference, what would be the point going there and come back with nothing to say/think about.
QCon London 2012 – Day 3
Posted by Mihailo Lalevic in Conference on March 10, 2012
Today was the final day of the conference. It has been a long week, but nonetheless rewarding. It was a pleasure being here and I feel I learned a lot during this time. Today, I planned to be mostly on Big Data/NoSQL track, with small brakes for some Working Distributed and The Rise of the Functional Programming.
The key note was given by John Allspaw and was about Resilient Response in Complex Systems. Read the rest of this entry »
QCon London 2012 – Day 2
Posted by Mihailo Lalevic in Conference, Uncategorized on March 8, 2012
Just got back from another day at QCon London 2012. Previous day was very good, but this morning I wasn’t quite sure what to expect from the sessions, and surely it was a mixed bag. Originally, I’ve planned to see Architectures You’ve Always Wondered About, but since Martin Thompson’s introduction to Finance track was so good I thought to give it a go.
Key note for today – Simple Made Easy, by Rich Hickey – author of Clojure. Read the rest of this entry »
QCon London 2012 – Day 1 of the Conference
Posted by Mihailo Lalevic in Conference, Uncategorized on March 7, 2012
Today was the first day of the conference, and it was a very good day. I must say it largely met my expectations. I was part of the day on Architecture track and part of the day on High Availability. But lets start at the beginning and the key note. Btw, no photos, my phone camera is useless 
QCon London 2012 – High Expectations
Posted by Mihailo Lalevic in Conference, Uncategorized on March 7, 2012
I am in London this week for QCon London 2012. Expectations are high and I hope it lives up to it. So far so good, I have to say. I have been on two tutorials so far and if quality is kept at this level I should be in for a treat.
Cardinality and Indexes Explained
Posted by Anthony Geoghegan in Database on January 4, 2011
What is cardinality with respect to an indexed column? Well cardinality is just a measure of how unique the information is in a column. For most index types, unique values are good and repeated values are bad.
For example, with a telephone directory, the more unique a name is the faster you can identify the person you are looking for. A name like “John Smith” is likely to have many entries and thus require verification of unindexed data to resolve the correct entry for your search, whereas “Zaphod Beeblebrox”, would be relative simple to identify.
Thus having a high cardinality or relatively unique column values, is typically a positive thing, in terms of index efficiency anyway.
If Android is the UNIX of Mobile Than Would Apple…?
Posted by yagizerkan in Android, iPhone on November 19, 2010
Most of us was expecting Android to become popular and to outsell iOS (this is currently true for the phones. I’m not sure about the tablets but give it a year or less) but not this fast. It is generating a lot of buzz and developer buy-in but there’s also some scepticism about its potential fragmentation. So the analogy that we keep hearing is “Will Android become UNIX of Mobile?”. And when I hear this I’m asking “Then would Apple build their next OS on Android?”.
Opinions on Tech Ed Europe 2010
Posted by Anthony Geoghegan in .Net, Architecture, Wireless on November 10, 2010
Once again wintery Berlin is the scene for yet another adventure deep in the bowels of Microsoft. Yesterday we discovered about the Windows Phone 7, the future of C# and Workflow 4. Today I was treated to more phone stuff and (amongst others) a hard core OS lecture.
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JavaOne 2010 – Day 3
Posted by yagizerkan in Java, JavaOne on October 6, 2010
I don’t know you, but I feel great to start a day when the sky is blue and the sun is shining. It was such a morning in San Francisco when JavaOne attendees headed to their first sessions of the day. I had selected two main themes for the 3rd days sessions: Mobile Application Development and Transactions.
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JavaOne 2010 – Day 2
Posted by yagizerkan in Java, JavaOne on September 23, 2010
Another morning but the same ritual: Getting ready, a short walk to Hilton San Francisco, silencing the grumbling stomach with a carb-packed breakfast and a cup of coffee for the morning pleasure. All this before joining the thousands of techies to attend the morning’s first session kicking off at 8am.
