question Change Data Capture in Databases Using Apache Nifi in Support Questions

Change Data Capture in Databases Using Apache Nifi

ahmedalsaidi — Wed, 05 Feb 2020 09:33:33 GMT

Dears,

I have to two different databases and the data inside them are identical:

MemSql DB
Postgre DB Frequently data changed

In future, I would like to sync the data between those DBs to capture the data when its changed in the main DB which is the PostgreDB and reflect that changes in the memSql DB.

Is there a way using Nifi to capture data changed in the Postgre DB and move the data changed to MemSql DB?

I look forward to hearing from you soon.

Regards,

Ahmed

Re: Change Data Capture in Databases Using Apache Nifi

StevenOD — Wed, 05 Feb 2020 12:34:25 GMT

Hi @ahmedalsaidi

Apache Nifi does not have a generic CDC processor as such. One way you can achieve a CDC like approach is to use the QueryDatabaseTable processor. Please take a look at this article on how to use the QueryDatabaseTable processor to do an incremental fetch of new rows in the source database:

https://community.cloudera.com/t5/Community-Articles/Incremental-Fetch-in-NiFi-with-QueryDatabaseTable/ta-p/247073

Alternatively, you use can use a vendor that specializes in CDC.

Please accept this answer as a solution if it helps you.

Steve