Hi Biplob, Yes, your assumptions are correct [1]. To be a bit more exact, the `AvroSerializer` will be used to serialize your POJO data types. That would be the case for data transfers and state serialization (unless for state serialization you specify a custom state serializer; see [2])
If not is there a way to register my objects (sometimes not exactly a POJO as recognized by Flink) with the avro serializers? If your objects are not recognized as POJO (in which case the `GenericTypeInformation` will be extracted instead of `PojoTypeInformation`), there’s also an alternative way to serialize to RocksDB using Avro. 1. You can simply register custom serializers for that type [3]. 2. Use custom state serializers for that specific registered state. Please see [2] for instructions on how to do that. Hope this helps! Cheers, Gordon [1] https://ci.apache.org/projects/flink/flink-docs-release-1.3/dev/types_serialization.html#serialization-of-pojo-types [2] https://ci.apache.org/projects/flink/flink-docs-release-1.3/dev/stream/state.html#custom-serialization-for-managed-state [3] https://ci.apache.org/projects/flink/flink-docs-release-1.3/dev/custom_serializers.html#register-a-custom-serializer-for-your-flink-program On 15 August 2017 at 4:36:27 PM, Biplob Biswas (revolutioni...@gmail.com) wrote: Hi, This is somewhat related to my previous query here: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Evolving-serializers-and-impact-on-flink-managed-states-td14777.html I was exploring Avro Serialization and in that regard I enabled the force use of avro using, env.getConfig().enableForceAvro(); Now, my assumption is all internal data transfers will be done using the Avro serde, what I also assume is that on my RocksDB state backend my objects would also be stored after serializing with avro. *Is this assumption correct? * If not is there a way to register my objects (sometimes not exactly a POJO as recognized by Flink) with the avro serializers? I want to de-/serialize my objects using avro and store it on my RocksDB state backend, but I am not really aware how can I verify the serializer which is used to perform that. Thanks and Regards, Biplob -- View this message in context: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Avro-Serialization-and-RocksDB-Internal-State-tp14912.html Sent from the Apache Flink User Mailing List archive. mailing list archive at Nabble.com.
