Hi,
 

1. I would like to test lz4 compression on a new broker node that I want add to 
my cluster, while the other nodes remain in snappy, in order to compare disk 
usage etc. I am not sure if this scenario is even possible with only one 
cluster, since in the docs it is mentioned that compression.type is a 
topic-level setting, and thus maybe not really per broker. I want to use 
Broker-side compression only. The situation is:
 
broker 1 - Status: Up - compression.type snappy
broker 2 - Status: Up - compression.type snappy
broker 3 - Status: Down - compression.type lz4

The topic for the test already exists on brokers 1 and 2 which are up and has 
some 20GB content.
 
When I start broker 3, will it use snappy or lz4 for the topic?

 
2. How can one migrate a cluster (or a topic) from one broker-side compression 
type to another?

 
Kind Regards,
Sven

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