Hi,
Considering a simple topology:
spoutD -> boltA -> boltB
where spoutD receives business data, and forwards to boltA for processing, the
results are then sent to boltB for further processing.
In our scenario, it is required that the parameters (or configuration) of
processing logics in boltA or boltB can be modified at runtime.
Our solution A is to send new paramter values directly to the specific bolt.
But we think this is not practical, since in storm it seems data input (no
matter what kind of data) should be done
in spout, and bolt gets input either from the upstream bolt or from spout - is
that right?
So we thought about solution B, which is adding a spoutC which is specifically
for receiving configuration data.
Then the topology turns to:
spoutD -> boltA -> boltB
| |
spoutC
where spoutC can dispatch the new processing parameter values to the boltA or
boltB.
Well, the cost is that as you can see the topology gets more complicating.
That's why we do not like solution B.
If solution A can work in a practical way, we prefer it to solution B. But is
it possible? Or do you have any better suggestions?
Best regards,
Hao Yu
