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Batch Insert/Update for Mysql in Java
Large inserts/Updates are a costly operation. One foolish way that I used to do is to run each update or insert query one at a time. Its incredibly slow. With most of the systems currently the latency is what is killing the performance not the CPU. Hence l …
User Level Threads
User level threads is created for light weight threads. It needs to be controlled, context switched and swapped by the process. To the Operating System it is only one process without any threads. Here is one implementation of it: q.h [c] #includ …
Service Engineer/System Administrator Interview Questions
This is not my code alone. It was the group effort of Vivek Ram, Cijo George, Sandeep Unni and mine during our epic preparation for Yahoo!. I am just putting it open for others who would be looking for this information. Convert all lower case to up …
Operator Preference Grouping Order in C
Here is a compilation of how the preference of operators are Left to Right grouping or Right to Left grouping in C. Level Operator Description Grouping 1 :: scope Left-to-right 2 () [] . -> ++ — dynamic_cast static_cast reinte …
Ontology Linked Data
The following is a Assignment on Ontology and Linked Data and the evolution of data which lead to the use of ontology in web. Thanks to my teammates Bharath Gowda and Sravani Thota for working on the same. Ontology And Linked Data An ontology for …
Important MySQL DBA Interview Questions
Here are a few sets of interview questions expected for MySQL DBA position.These are compilation of the usual questions from various DBA texts: What is Log Switch? – The point at which ORACLE ends writing to one online redo log file and begins writin …
Automatic Command Archive
The default command storing size of ubuntu is 500 commands. It stores the commands in home folder in the file “.bash_history” . The problem is 500 commands is too short of a size. One method is to increase the command size to a large value by changing th …
BSNL Dataone Auto Downloader
Bsnl(India) provides an account that has 2am to 8am unlimited download. It was not easy to wake up at 2am and switch on the computer and sleep again. So I tried to find a method to switch on the computer automatically at 2am and download and shutdown at 8a …
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