Monday, October 23, 2006

OOW2K6: Sleepy Sunday

The first presentation of Open World for me was Tim Gorman's talk on Scaling to Infinity. Obviously I didn't read the abstract properly because this took me by surprise. Instead of being a way to gently ease myself into the spectacle Tim's talk gave me some very useful insights that are immediately relevant to my current project. "All databases are victims of their own success" was especially resonant. Tim's key point was that we can only scale VLDWs if we design them properly from the startpoint. In particular we need to avoid any heavyweight DML (i.e. UPDATE and DELETE) and use partioning smartly. One of my pending tasks is to improve the elasped times of queries in the searching datamart. I think in the light of Tim's talk I am going to have to revisit my implementation (which uses bitmap indexes and partioning) as I'm not sure it's going to scale to infinity.

After that it was up to the icy wastes of the Hilton's sixth floor to watch "Tiger" Mark Rittman dicing with death. Or at least exploring the slapstick possibilities offered by the trailing radio mike's cables. Beforehand Mark had expressed a concern that he wouldn't be able to fill the ninety minute slot on the new BI Suite EE. But in the end he ran out of time, with material still to do. Who would have thought Mark could be so talkative? I had better quickly say that Mark's presentation was coherent and informative and didn't feel incomplete. And he coped gracefully with the inevitable failure of one of his demos.

In the evening the ACEs dinner was nice, although I drank too much wine and didn't eat enough food. I almost got stuck with the bill after the manager mistook me for Andrew Carr. Well, I thought she said "Are you Andrew Clarke?". It doesn't help that we are both balding, bearded and British. Fortunately I eventually managed to introduce her to the right Brit, otherwise I'd be there still, washing dishes. I ended up seated next to Steven Feuerstein who wanted to know whether my presentation was going to focus on utPlsql (which it does). He thinks Code Tester (formerly QUTE) is a much better tool and he's certainly convinced me to take a second look.

I was awake again at 02.00am so I went through my presentation once more. Just as well: I ran my scripts and the first test failed with ORA-01438: Value larger than specified precision allows for this column.  I know I've joked about breaking my demo but this wasn't funny. Eventually I figured it out. The EMP.EMPNO column is NUMBER(4,0) and I had simply run the code so often that my EMPNO_SEQ had clocked 10000. After I dropped and recreated the sequence the scripts ran fine.


Anonymous Anonymous said...

SEO, search engine optimization. Is to make your Web site or Blog search engines more popular in other search-related content, as far as possible to make your site appear in the results of the first of several. This will bring a wow power leveling lot of traffic, instead of complaining all day: Why am I the one does not see. At present, some of my traffic from search engine Baidu and is the most stable source of traffic. I almost did not do anything, so naturally things happened. If the SEO from the point of view, I probably spent the most stupid and most simple way, but really effective. If the search engine as a beauty, then what is the point of a simple way to let her eyes you see more of it? First, you havewow powerleveling enough fresh interesting. Second, you are unique and eye-catching. Third, you are indeed very interesting new connotation enough to say that the speed of your time in the first issued a message, followed by everyone from here to you, then you are a source of information. Found on the girl has great respect for the source of information, as your grasp, it would wow gold be tantamount to grasp the numerous reproduced the contents of your site. In that case, she must be approved by the Changlaikankan your station. The fastest you that she is from here you get the fastest, so her customers can also receive up-to-date search results. So, note to Mars will not do. The result is you confuse the site in a large site on Mars, found the girl simply can not tell to your face.

28 November 2008 07:07:00 GMT-8  

Post a Comment

<< Home