?
Solved

Oracle Fail Safe

Posted on 2010-08-20
1
Medium Priority
?
600 Views
Last Modified: 2012-05-10
Can somebody explain how failsafe works from a networking point of view.

Does the primary publish a virtual IP address; the primary and secondary share this IP address and  and MAC address and following fail-over, the secondary just answers the same requests as the primary.

Or do they share an IP address but have different MAC addresses, so a re-ARP is required by the client is required, or is action required by the client to re-initiate a connection to the secondary server after fail-over (i.e. a specially written client is required?

Thanks,
Stevod
0
Comment
Question by:Stevod2
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 8

Accepted Solution

by:
tomcatkev earned 2000 total points
ID: 33490449
The cluster configuration can have the same Virtual IP for whatever is the active node following failover, but doesn't necessarily have the same MAC address.  This is really a matter of how the Windows cluster is configured, and I don't think you want multiple active nodes with the same MAC address, and if you are doing some Active / Active clustering (i.e. 1 database on each nodes, with failover resulting in 2 DB running on the remaining active node), then you really can't change MAC addresses, but you can set up seperate VIPs for the 2 databases, and have one node that accepts connections for both VIPs.

It is possible to code TNSNAMES.ora to achieve Transparent Application Failover, this may be something you want to look into...  http://wiki.oracle.com/page/Transparent+Application+Failover+(TAF)
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Truncate is a DDL Command where as Delete is a DML Command. Both will delete data from table, but what is the difference between these below statements truncate table <table_name> ?? delete from <table_name> ?? The first command cannot be …
How to Create User-Defined Aggregates in Oracle Before we begin creating these things, what are user-defined aggregates?  They are a feature introduced in Oracle 9i that allows a developer to create his or her own functions like "SUM", "AVG", and…
This video shows setup options and the basic steps and syntax for duplicating (cloning) a database from one instance to another. Examples are given for duplicating to the same machine and to different machines
This video shows how to configure and send email from and Oracle database using both UTL_SMTP and UTL_MAIL, as well as comparing UTL_SMTP to a manual SMTP conversation with a mail server.

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question