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data guard

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DataGuard – Far Sync – part 2 - Data Guard Broker

Oracle introduced Far Sync Data Guard configuration which I described briefly in this post. Now is time for part two and using Data Guard Broker to add Far Sync instance.
Assuming that you have basic Data Guard Broker configuration ready (as described in - How to quickly build standby database and setup DataGuard configuration using Oracle 12c) adding new Far Sync instance is quite easy task.

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How to quickly build standby database and setup DataGuard configuration using Oracle 12c

With every release of Oracle database there are new possibilities to build a required solution (ex. standby database) faster and with fewer steps. This is not official guide but rather a mix of Oracle 12c functionality used to build DataGuard configuration using RMAN and DataGuard Broker.

Assumptions:
  • There is a database which will be used as primary.
  • New listener will be added to support standby traffic

Steps to run on primary database

Listener configuration

LISTENER_DG =

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How to quickly build standby database and setup DataGuard configuration using Oracle 12c

With every release of Oracle database there are new possibilities to build a required solution (ex. standby database) faster and with fewer steps. This is not official guide but rather a mix of Oracle 12c functionality used to build DataGuard configuration using RMAN and DataGuard Broker.

Assumptions:
  • There is a database which will be used as primary.
  • New listener will be added to support standby traffic

Steps to run on primary database

Listener configuration

LISTENER_DG =

DataGuard – Far Sync – part 1 – simple configuration

Oracle introduced a new feature for DataGuard called Far Sync. This configuration is design to support synchronous redo transport between primary and standby database which are far apart. In usual configuration synchronous redo transport between data centre in Europe and US is possible but inefficient from the primary database performance perspective. Every commit has to be written locally to redo logs and send to standby with confirmation – a network round trip between Europe and US is a significant delay for every commit operation in synchronous mode.

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DataGuard – Far Sync – part 1 – simple configuration

Oracle introduced a new feature for DataGuard called Far Sync. This configuration is design to support synchronous redo transport between primary and standby database which are far apart. In usual configuration synchronous redo transport between data centre in Europe and US is possible but inefficient from the primary database performance perspective. Every commit has to be written locally to redo logs and send to standby with confirmation – a network round trip between Europe and US is a significant delay for every commit operation in synchronous mode.

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How to set up data guard broker for RAC

This is pretty much a note to myself on how to set up Data Guard broker for RAC 11.2.0.2+. The tests have been performed on Oracle Linux 5.5 with the Red Hat Kernel. Oracle was 11.2.0.2. Sadly my lab server didn’t support more than 2 RAC nodes, so everything has been done on the same cluster. It shouldn’t make a difference though. If it does, please let me know).

WARNING: there are some rather deep changes to the cluster here, be sure to have proper change control around making such amendments as it can cause outages! Nuff said.