Re: DataGuard Failover and Thin Clients

  • From: "Thomas A. La Porte" <Thomas.LaPorte@xxxxxxxxxxxxxx>
  • To: "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
  • Date: Thu, 14 Jan 2010 11:15:47 -0800 (PST)


What version of the thin client are you using? I just discovered recently that the thin client supports using TNSNames aliases as of 10.2.x.

I haven't had our developers make any changes to utilize this yet, but it looks like it would be an option for you that would eliminate some added complexities.

 -- Tom

Thomas A. La Porte, DreamWorks Animation

On Thu, 14 Jan 2010, MacGregor, Ian A. wrote:

For thick clients the tnsnames.ora file includes two or more hosts for a given service_name, I believe clients treat this as an ordered list and try each one until a connection is established. Thin clients do not use tnsnames. One suggestion is to use LDAP.but I'm not sure how universal that is nor exactly how to set it up.

Another thought is to have the machines switch names and ip addresses right after a switchover. These machines have four NIC's each. Oracle would be a service on one of them. This type of thing is often done via clusterware. Can Oracle's clusterware do this? This is not a RAC environment, but a physical standby one.

I realize there are going to be consequences of doing this, any which are unsurmountable. I'm not in favor of this. It seems over-engineered, but that may be due to ignorance.

Ian MacGregor
SLAC National Accelerator Laboratory


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