Hi Alexander, I haven't tried Kafka Streams on Windows but did notice that Microsoft has merged code into github to make RocksDB available on Windows. Perhaps this is useful: https://blogs.msdn.microsoft.com/bingdevcenter/2015/07/22/open-source-contribution-from-bing-rocksdb-is-now-available-in-windows-platform/
Thanks, Eno > On 8 Jun 2016, at 19:47, Alexander Jipa <alexander.j...@gmail.com> wrote: > > Hello, > According to > http://www.confluent.io/blog/introducing-kafka-streams-stream-processing-made-simple: > “In terms of implementation Kafka Streams stores this derived aggregation in > a local embedded key-value store (RocksDB by default, but you can plug in > anything).” > > So I tried running the world count example on my Windows machine (for local > test) and got an error because RocksDB is not available for windows. > I thought it would be easy to switch to an in-memory store. > But after awhile I’ve figured out that the KStream aggregation implementation > doesn’t allow that. > It looks like aggregateByKey (and thus countByKey) is always using a > persistent store. > More over that it looks like there’s no way to change the default persistent > store… > > Even though I was more or less capable of achieving the goal using manual > wiring of a Source, a Producer and a Sink – it doesn’t make it for an easy > coding… > > The questions that I have are: > - Is there a plan of providing a persistent store support for Kafka > Streams on Windows? > - Is there a plan of providing KStream API to specify a custom > store/factory for aggregations? > - Is there a way of changing the default persistent store from > RocksDB? > > Best Regards, > Alexander Jipa
