Inilien edited a comment on issue #4199: documentation: unclear how to use Pulsar IO URL: https://github.com/apache/pulsar/issues/4199#issuecomment-495983977 @sijie yes, thank you Considering yaml configuration I found [this section](https://pulsar.apache.org/docs/en/pulsar-admin/#source) of docummentation - the [create](https://pulsar.apache.org/docs/en/pulsar-admin/#create-4) command accepts yaml configuration file which is I assume is exactly the file from this [example](https://pulsar.apache.org/docs/en/io-managing/#configuring-connectors) which I linked in the first message in the thread. (I don't know why I couldn't find this earlier... sorry) It is still unclear if it is possible to specify custom serialization/deserialization logic for sinks and sources. From your previous answer I assumed that Pulsar IO doesn't support any SerDe logic but in [source create](https://pulsar.apache.org/docs/en/pulsar-admin/#create-4) and [sink create](https://pulsar.apache.org/docs/en/pulsar-admin/#create-3) I found these `--deserialization-classname` and `--custom-serde-inputs` parameters respectfully. Could they be used to serialize data ingested into Pulsar into protobuf format in source connectors and deserialize from protobuf in sink connectors?
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