Hello,
This might really be painful migration. The reason of Cassandra, although being very reliable and probably write-fast, gives very very less flexibility as far as schema is concerned.
So please let me now the schema, and then i might be able to tell you exact things related to its portability.
May i know how complex is the REST api and why do you think Apache Storm is the best solution?
Let me know please
~-~-~-~-~-~- About us ~-~-~-~-~-~-
I am Zeeshan, and for most part of last 12 years working over C++(Windows and Mac desktop), Node.JS/PHP/Python (Web and API), Swift/ObjC(iOS) and Java/Kotlin(Android). We have worked over 200+ projects in last 3-4 years alone with the help of a small and very trustable team that works under the same roof.
We have best reviews of any freelancer here , 5 / 5 for all the reviews.
www.freelancer.com/u/Whizpool.html
Thanks,
Zeeshan