How to setup DGMGRL, broker with example

Wed, 25 Feb 2009 03:03:00 GMT

Data Guard broker helps to efficiently manage a dataguard configuration through a client connection to any database in the configuration and it's very easy to switchover/failover with one command thereby minimizing overall downtime associated with planned/unplanned outage. It's also integrated with CRS so that database role changes occur smoothly and seamlessly. Here, we'll see how easy it is to setup using command line interface DGMGRL with an example.

Getting started with 11.2.0.2 - The Upgrade

Mon, 08 Nov 2010 22:04:31 GMT

With advent of Oracle 11.2.0.2, lots of bugs associated with 11gR2 database are supposed to be fixed so I've been testing the installation, upgrade and the new features pertinent to it. This post shall cover the steps to upgrade from Oracle 10.2.0.4 to 11.2.0.2 using silent installation and manual upgrade. In the next one, I'll share the new features specific to 11.2.0.2

Oracle 11gR2 Features and Bugs

Sat, 31 Jul 2010 05:19:11 GMT

For last few months, I've been busy like hell dealing with umpteen number of Oracle 11gR2 RAC installations and upgrades and it's been a roller coaster ride discovering a new feature or bug every day. So I reckon it's high time to consolidate and put together a summarized checklist for fellow DBAs. Obviously, I won't be able to cover all the 11gR2 features but nevertheless would like to share my learnings and discoveries.

How to switchover using DGMGRL, broker with example

Mon, 02 Mar 2009 21:06:00 GMT

This time around, we'll do a switchover and switchback exercise using Oracle dataguard broker. If you need help on setting up the broker, refer my previous post How to setup DGMGRL, broker with example . We'll see how easy it is to switchover using just one command provided the broker is configured correctly. We'll also cover sample examples along with troubleshooting tips and comprehensive sanity checks.

Oracle 10g CRS troubleshooting tips and tricks

Sat, 21 Aug 2010 16:40:40 GMT

It's all good to be an architect and discuss Oracle internals at length but in real time production issues, when the shit hits the fan, everyone runs for the cover. Anyways, without digressing further, I've tried to consolidate various issues pertinent to 10g CRS along with troubleshooting tips and specific examples to fix them.

How to use Oracle Resource Manager to control degree of parallelism with examples

Wed, 09 Feb 2011 01:03:03 GMT

Oracle Database Resource Manager can be used to manage resources based on workload like idle time limits, CPU utilization, degree of parallelism, etc. Here we'll focus on on how to set it up and few examples pertinent to controlling degree of parallelism(DOP).

EMC Powerpath and ASM

Sat, 02 Oct 2010 22:10:37 GMT

EMC Powerpath basically provides multipathing and improves I/O over SAN. When dealing with CLARiiON array, database backup would be taken at LUN level using Navisphere CLI(naviseccli) snapview that would allow to create a copy of LUN using snapshots. That's why it becomes highly imperative to have mapping of LUN to physical device and ASM diskgroup. I'll be covering on the script to have that kind of mapping using powerpath management utility and also a little bit on I/O.

Using FAN callouts, relocate a service back

Tue, 07 Apr 2009 04:35:00 GMT

In Oracle 10g RAC, when an instance goes down, services running on that instance are relocated to other available instances. But when that instance comes back up, those relocated services need to be manually put back to their preferred instance. By using FAN callouts, we can automate this task.

Getting started with 11.2.0.2 - New features

Wed, 17 Nov 2010 18:15:03 GMT

This is 2nd part of getting started with 11.2.0.2 series. In the previous one we saw the upgrade process . Here, we'll see new features specific to 11.2.0.2. For general overview of 11gR2 new features, refer to Oracle 11gR2 Features and Bugs .

Heterogenous connection from Oracle database to Microsoft SQL server

Thu, 05 Mar 2009 06:05:00 GMT

Using Oracle's heterogenous services also known as HS, we can make a connection to non-Oracle databases and access the data remotely. I used MS SQL server as the target non-Oracle database on Windows and used HS to access from Oracle database residing on Linux. Here, we'll see step by step instructions on how to set up a connection from Oracle database to Microsoft SQL server.

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