time estimate for clustering an akka app

[Tim Pigden]

Hi

I'm doing a proposal. I need a rough time in days to turn a single machine akka application - using spray/akka-http into something that runs on a cluster (of 2 for time being, located on same site).

Assume I have never clustered an akka and didn't sit through that last bit of Roland's coursera course - so I have no idea what's involved - so learn then do it.

Is a week enough?

[Justin du coeur]

Others may have different opinions, but I suspect there's too much "your mileage may vary" to answer the question.  For example, I'm planning for two months to cluster my app (probably starting in March) -- but that's about forty thousand lines of code involving several dozen different Actor types, including almost a dozen singletons that need to be properly sharded around the system.  (The architecture of this system predates Akka Clustering, much less Cluster Sharding, so there's a lot to be evolved.)

That's probably the upper edge.  I would guess that the correct answer depends strongly on how "clean" your system already is.  If it's full of relatively uniform Actors and is simply being scaled out, it's likely relatively easy.  The more heterogeneous the system, the more singletons you currently have, and the more you care about which Actors land on which nodes, the more work it's likely to be...

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[Tim Pigden]

Hi thanks
I've been doing some research and concluded that was probably the case
(mileage may vary that is)

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