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Don’t go directly to Maximum Protection!

With a Data Guard Configuration in Maximum Performance protection mode, don’t go to Maximum Protection directly, because that leads to a restart of the primary database:

 Attention!

Restore datafile from service: A cool #Oracle 12c Feature

You can restore a datafile directly from a physical standby database to the primary. Over the network. With compressed backupsets. How cool is that?

Here’s a demo from my present class Oracle Database 12c: Data Guard Administration. prima is the primary database on host01, physt is a physical standby database on host03. There is an Oracle Net configuration on both hosts that enable host01 to tnsping physt and host03 to tnsping prima

 

n/a

Rolling upgrads using logical standby database.

Couple of weeks ago there was a Twitter discussion started by Martin Bach (@MartinDBA) about cases for logical standby implementation. A rolling upgrade was mentioned by Tim Gorman (@timothyjgormanas) as one of potential recommendations for using this rare use product. I have been involved in such project in the past and I prepared an instruction and did quite large number of rolling upgrades from 11.1 into 11.2.

There are couple of my “gotchas”

Rolling upgrads using logical standby database.

Couple of weeks ago there was a Twitter discussion started by Martin Bach (@MartinDBA) about cases for logical standby implementation. A rolling upgrade was mentioned by Tim Gorman (@timothyjgormanas) as one of potential recommendations for using this rare use product. I have been involved in such project in the past and I prepared an instruction and did quite large number of rolling upgrades from 11.1 into 11.2.

There are couple of my “gotchas”

Data Guard 12c New Features: Far Sync & Real-Time Cascade

UKOUG Oracle Scene has published my article about two exciting Data Guard 12c New Features:

http://viewer.zmags.com/publication/62b883ad#/62b883ad/44

Far Sync Instance enables Zero-Data-Loss across large distance

Hope you find it useful :-)

RAC 12c enhancements: adding an additional SCAN-part 4

This is going to be the last part of this series, however long it might end up being in the end. In the previous articles you read how to create a physical standby database from a RAC One database.

Networks (refresher)

To make it easier to follow without going back to the previous articles, here are the networks I’m using, listed for your convenience.

  • 192.168.100/24: Client network
  • 192.168.102/24: Dedicated Data Guard network

Data Guard Broker Configuration

RAC 12c enhancements: adding an additional SCAN-part 4

This is going to be the last part of this series, however long it might end up being in the end. In the previous articles you read how to create a physical standby database from a RAC One database.

Networks (refresher)

To make it easier to follow without going back to the previous articles, here are the networks I’m using, listed for your convenience.

  • 192.168.100/24: Client network
  • 192.168.102/24: Dedicated Data Guard network

Data Guard Broker Configuration

RAC 12c enhancements: adding an additional SCAN-part 3

Travel time can be writing time and while sitting in the departure lounge waiting for my flight I use the opportunity to add part 3 of the series. In the previous two parts you could read how to add a second SCAN and the necessary infrastructure to the cluster. Now it is time to create the standby database. It is assumed that a RAC One Node database has already been created on the primary cluster and is in archivelog mode.

Static Registration with the Listeners

The first step is to statically register the databases with their respective listeners. The example below is for the primary database first and standby next, it is equally applicable to the standby. The registration is needed during switchover operations when the broker restarts databases as needed. Without static registration you cannot connect to the database remotely while it is shut down.

RAC 12c enhancements: adding an additional SCAN-part 3

Travel time can be writing time and while sitting in the departure lounge waiting for my flight I use the opportunity to add part 3 of the series. In the previous two parts you could read how to add a second SCAN and the necessary infrastructure to the cluster. Now it is time to create the standby database. It is assumed that a RAC One Node database has already been created on the primary cluster and is in archivelog mode.

Static Registration with the Listeners

The first step is to statically register the databases with their respective listeners. The example below is for the primary database first and standby next, it is equally applicable to the standby. The registration is needed during switchover operations when the broker restarts databases as needed. Without static registration you cannot connect to the database remotely while it is shut down.