Re: [rules-users] Parallel / Distributed Optaplanner
Hi Jonathan,
On 09-06-14 20:52, jonathan.labin wrote:
I know that this topic has come up before. At various times there
were
responses indicating that it was being considered at some level within the
project(s).
How has that played out? Was there progress or has the idea been put on the
back-burner? Was something discovered that seems to make the idea not worth
pursuing?
It's still on my mind and in the roadmap:
https://issues.jboss.org/browse/PLANNER-76
Other issues have currently taken priority (due to customer requests etc).
http://www.optaplanner.org/download/releaseNotes/releaseNotes6.1.html
In 6.1 (CR1 is being build right now), more preparation for this is in
place: everything is now on the selector architecture.
The technical challenge is still the same: don't break incremental score
calculation while parallelizing OptaPlanner,
because incremental score calculation is a far bigger speedup than
anything parallelization can bring to the table.
The technical design that adheres to this is still the same (last
comment on PLANNER-76):
Use surrogate entity id's, to allow migrating Move's from 1
workingSolution to another.
I'm contemplating doing some investigating of my own to attempt to leverage
additional hardware in a distributed way for our application. But I didn't
want to end up re-discovering things or try things that have already proved
to be a dead end by an effort ongoing within the project.
Any experiments you do
would be interesting for me to observe.
Especially if it's user-domain agnostic, I am interested to merge a PR
adding this functionality.
Any insight you could share?
Parallelize the method
LocalSearchDecider.pickNextStep() :)
Replace the LocalSearchDecider instance in DefaultLocalSearchPhase with
your own.
Extend LocalSearchPhaseConfig to be able to do that.
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