Yes you can build something for data enrichment as long as your use some sort of LRU cache on the bolt that is fairly sizable and your event volume is reasonable to make sure there won't be a bottleneck in the topology.
On Sep 13, 2016 10:43 AM, "Daniela S" <daniela_4...@gmx.at> wrote: > Dear all, > > is it possible to add some kind of "historical data" to a data stream in > Storm? I would like to lookup an entry in a database for every tuple when > it arrives in Storm and to join the values of this entry with the tuple to > proceed with processing. > > Thank you in advance. > > Best regards, > Daniela >
