Zero Downtime Consolidation to Oracle Database 12c: Webcast Recap

As companies move to private cloud implementations to increase agility and reduce costs, and start their plans with consolidating their databases, a major question arises: how do we move our systems without causing major disruption to the business. At the end, the most important systems that need to move to this new architecture are the ones that cannot tolerate extensive downtime for any reason. In last week’s webcast “Zero Downtime Consolidation to Oracle Database 12c with Oracle GoldenGate 12c” we tackled this specific dilemma that IT organizations face. The webcast is now available on demand via the link above in case you missed it last week.

In the webcast, we started discussing the benefits companies achieve when they consolidate to a private database cloud, critical database capabilities to deliver database as a service, and a quick overview Oracle Database 12c features that enable private database clouds deployments. Nick Wagner, director of product management for Oracle Database High Availability, talked about the new Global Data Services feature in Oracle Database Maximum Availability Architecture (MAA) as well. Global Data Services helps organizations to handle challenges involved with managing multiple database replicas across different sites. The product manages database replicas of Active Data Guard and Oracle GoldenGate products, and offers workload balancing to maximize performance as well as intelligent handling of outages using all available replicas. Nick also discussed the database features available for upgrading, migrating, and consolidating into Oracle Database 12c and when it makes sense to use Oracle GoldenGate for these efforts.

After Nick, Chai Pydimukkala from senior director of product management for GoldenGate discussed some of the key new features of Oracle GoldenGate 12c for Oracle Database and its expanding heterogeneity that supports consolidation from all major databases. Chai continued his presentation with GoldenGate’s solution architecture for zero downtime consolidation and explained how it minimizes risk with failback option as well as via the phased migration option by running old and new environments concurrently.

Chai also gave an example on how Oracle Active Data Guard customers can seamlessly use GoldenGate for a zero downtime migration without affecting their standby system for high ongoing high availability and disaster recoery. After customer examples we had a long Q&A section. For the full presentation and Q&A with the experts you can watch the on-demand version of the webcast via the following link.

Zero Downtime Consolidation to Oracle Database 12c with Oracle GoldenGate 12c

In the rest of this blog post, I provided  answers to some of the questions we could not take in the live event. 

1) Additional difference in features between GoldenGate 11g and 12c?

Please take a look at our previous blog posts below where we discussed many of the new features of GoldenGate 12c.

· Advanced Replication for The Masses – Oracle GoldenGate 12c for the Oracle Database.

· GoldenGate 12c - What is Coordinated Delivery?

· GoldenGate 12c - Coordinated Delivery Example

· Oracle GoldenGate 12c - Announcing Support for Microsoft and IBM

You can also listen to our podcast: Unveiling Oracle GoldenGate 12c

More comprehensive information can be found in the webcast replay  Introducing Oracle GoldenGate 12c: Extreme Performance Simplified or GoldenGate 12c resource kit.

2) Does GoldenGate have a term license that customer can purchase for migration purposes?

We do offer 1 year license that customer can be used for this purposes.

3) Is there a Oracle Tutorial on configuring and testing Zero downtime upgrade using GoldenGate?

Here is a high level outline/tutorial for the migration. It will require some knowledge of how to setup GoldenGate and configuration.

Oracle GoldenGate Best Practice: Oracle Migrations and Upgrades 9i and up

A more broad discussion of this topic can be found in the following white paper. Zero Downtime Database Upgrades using Oracle GoldenGate 12c

4) If the number of updates to the database is very high, does GoldenGate give some kind of compression to transfer the Trail Files and be up to date with the changes?

Oracle GoldenGate does provide support of compress of change data in the Trail File to better the transfer throughput from source to target with the usage of COMPRESS and COMPRESSTHRESHOLD. 


{host_name | IP_address}

{, MGRPORT port | PORT port}



[, ENCRYPT algorithm [KEYNAME key_name]]

[, PARAMS collector_parameters]


[, TCPBUFSIZE bytes]


[, TIMEOUT seconds]


This option is valid for online or batch Capture processes and any Oracle GoldenGate initial-load method that uses Trails. Compresses outgoing blocks of records to reduce bandwidth requirements. Oracle GoldenGate decompresses the data before writing it to the Trail. COMPRESS typically results in compression ratios of at least 4:1 and sometimes better. However, compressing data can consume CPU resources.


This option is valid for online or batch Capture processes and any Oracle GoldenGate initial-load method that uses trails. Sets the minimum block size for which compression is to occur. Valid values are from 0 and through 28000. The default is 1,000 bytes.

5) Can the Source system utilize 12C GoldenGate for DML/DDL capture and target system utilize GoldenGate 11g?

Yes.  You can replicate from a higher version of GoldenGate to a lower version using FORMAT RELEASE option. 

FORMAT RELEASE <major>.<minor>

In the on demand replay of the webcast you will find more questions answered by our product management experts. So make sure to watch the on demand webcast as well.


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