Demo of OpenLogReplicator
I have created a short video demonstrating how OpenLogReplicator works. Enjoy! https://www.youtube.com/watch?v=6SMsUV1nN4U
2018
OpenLogReplicator – first log-based open source Oracle to Kafka CDC replication
I have figured out that writing about somebody else’s software is boring. Why not create your own. So here it is: All code GPL v.3 Just C++ code – absolutely no Java/Python or any other interpreted language Purely reading Oracle Redo Log from disk – zero additional load to the database instance High performance architecture …
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Oracle GoldenGate Parallel Internals – my presentation from POUG 2018
This is my presentation I have show today on POUG 2018 Oracle GoldenGate Parallel Replication Internals. Feel free to send me comments.
Oracle GoldenGate Parallel Integrated Replicat – DML rearrangement in transactions
While preparing my presentation for POUG 2018 conference I have found some different behavior in Parallel Intgrated Replicat. This is a new Replicat type available from version 12.3. According to Oracle internal tests Parallel Replicat can be up to 5 times faster than Integrated Replicat in the same test case. I have done a number …
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Oracle GoldenGate data filtering with WHERE and FILTER parameters the right way
One of the most trivial tasks for data replication is to define a replica of the table with just a subset of the rows from the source table. For example we would like just to replicate the ACCOUNTS table with some type (one column has some defined value). If you want to replicate that using …
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Oracle GoldenGate point in time source database recovery
Even though you would like to secure the database from any disaster with HA, still it might happen that the database gets corrupted and a recovery from backup is needed to recover the database. In a critical scenario you might need to use Point In Time Recovery (PITR). Let’s focus on a scenario when the …
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Oracle GoldenGate Coordinated Replicat unsynchronized mode troubleshooting
According to the Oracle GoldenGate Coordinated Replicat documentation if the Replicat is stopped in an unclean manner the threads may be unsynchronized. Different threads may reach different checkpoint positions. Let’s find out what what might be the consequences of this situation.
Oracle GoldenGate Coordinated Replicat – is it a fully transactional replication?
Oracle GoldenGate till version 11.2 could only work serially. The only way of creating parallel replication and speeding up the apply process was to create multiple Replicat processes. In version 12.1 there was a new option available: the Coordinated Replicat. It is often misunderstood as a way of speeding up transactional replication. But … is …
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Oracle GoldenGate Replicat Checkpoint table
In one of my previous posts I have described the rationale for using a checkpoint table in the Replicat process. This is a summary of all possible combinations of Replicat process and which of them are able of (not) using checkpoint table.
Oracle GoldenGate Integrated Replicat and NOSCHEDULINGCOLS
According to the documentation it is not allowed to use NOSCHEDULINGCOLS with ADD TRANDATA when you would use Integrated Replicat. Why would Oracle care for that? Let’s find out what can happen if you don’t apply the rules.