All Entries posted in category OraTalk

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.

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.

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.

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.

How to configure stunnel for Oracle with example

Tue, 24 Feb 2009 22:39:00 GMT

If you need to setup encrypted connection between your Oracle client and Oracle server, here are the steps on how to configure stunnel for Oracle with sample configuration files