Oracle

Oracle GoldenGate Extract Internals, Part II

Today we continue looking at various aspects of how the Oracle GoldenGate extract process works. One of the follow up questions to part I was about the way the Extract process reads from ASM storage. I’ve provided the answer, however, today we’re going get a detailed look at how the Extract process interacts with an ASM instance and what kind of implications may result. Let’s take a look at what changes in the Extract process loop when it reads from ASM storage:

Oracle GoldenGate Extract Internals, Part I

Since GoldenGate has been declared as a strategic direction for replication technology by Oracle, it sounds like it’s time to get up to speed with various aspects of how this technology works and performs. Let’s see what kind of techniques they were able to utilize in order to achieve their goals. I did a simple replication setup between two different databases with the Extract, DataPump and Replicat processes. I’m planning to take a look at all of these but today is the Extract’s process turn.

Oracle’s January 2010 Critical Patch Update is out

Oracle has just released their January installment of their critical patch update (CPU). Vulnerability CVE-2010-0071 is particularly critical, with a CVSS score of 10, the highest possible. It’s a remotely-exploitable listener vulnerability that’s particularly severe on Windows platforms. Full details are on Oracle’s security site.

GPL/ASL/BSD License Misconceptions and MySQL

Having been a free software user and supporter for many years, I am disheartened by some of the comments made in the MySQL/Oracle debate regarding the GNU Public License (GPL) and other licenses. There is much throwing around of misconceptions and untruths about licenses and their differences. In this blog, I shall take on some of the bigger misconceptions.

Oracle Streams Apply Process changes in 11GR2

It is somewhat timely that we’ve been doing some Oracle Golden Gate testing which in turn made me curious to take a closer look at Oracle Streams in 11GR2 and see where all the performance is coming from. I’ve setup a simple replication for table t1 from schema src to schema dst, changed Apply Server parallelism to 1 and did a simple test with inserting 100 rows while performing a sql trace. Let’s get started.

Save MySQL by letting Oracle keep it GPL

In this article I am responding to many parts of Monty’s post (linked here) which are just plain not true, or are exaggerations. I will give my own answers to the self-interview questions Monty provides, as I feel he is using his name and popularity to spreading fear that is not warranted.

Oracle 11.2 Silent Installation on OpenSolaris

When Oracle announced Oracle 11.2 for Solaris (x86-64), I decided to try a silent installation of Oracle on OpenSolaris, even though it is not certified. I downloaded the Solaris ISO and installed it as 64-bit on one of my virtual machines without a problem, I was soon enjoying OpenSolaris. I eventually stopped admiring the good-looking interface and connected through a plain old black-and-white ssh terminal to execute the silent installation. Based on the silent installation that I had earlier executed on Linux for 11.2, I started the following…

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