Monthly Archives: July 2017

Two Hidden Bugs of Conditional Operators

      Comments Off on Two Hidden Bugs of Conditional Operators

Programmers create bugs, but experienced programmers should be familiar with their language and have best practices to avoid possible common bugs. I found operators are sometimes easy to behave weirdly. Today I memo two bugs to help readers and myself avoid them in the future. == has higher precedence than && and ||… Read more »

Difference between Redirection and Pipe in Linux

      Comments Off on Difference between Redirection and Pipe in Linux

Now and then, I meet symbols such as >, >>, &&, ||, and  | between Linux commands in CLI. Every time I had a hard time recalling the concepts and difference between Redirection and Pipe, I wanted to write a short but to-the-point summary of it. Simple but astonishing idea… Read more »

Distributed Database Review 1: Oracle RAC

      Comments Off on Distributed Database Review 1: Oracle RAC

I found some typical structures of distributed database systems and I want to write short reviews in the following posts. Database systems on a single machine suffers from low availability (single point failure), low concurrency (one query per core), low reliability (no replication) and low scalability (computing resources limitation). Therefore… Read more »