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From Jungtaek Lim <>
Subject Re: Dynamic metrics in V2 system
Date Thu, 29 Mar 2018 15:11:44 GMT
Hi Simon,

Actually I'm not familiar with codahale-based metrics system, but from the
guide on codahale website, metrics can be registered even after starting
reporters, which makes possible to have dynamic metrics.

Please refer "Complete getting started" in

Hope this helps.

Jungtaek Lim (HeartSaVioR)

2018년 3월 28일 (수) 오후 9:38, Simon Cooper <>님이

> Hi,
> We're looking at upgrading our topologies to use the new V2 metrics
> system, however one of our absolutely core requirements is the ability to
> dynamically create/assign metrics after the topology is started up - we
> don't know what metrics we'll be running beforehand, and the metrics can
> change during the lifetime of the topology. We handled this in the V1
> system using IMetric wrappers, but the codehale-based metrics system
> doesn't seem to have the ability to do this.
> If the V1 system is removed in a future version, this means we won't be
> able to use the storm metric system to report our metrics, which is a real
> shame, as we’ll lose all the built-in info that storm provides. We'll need
> to implement our own system from scratch & basically duplicate all the
> existing infrastructure.
> Is there a way we can create metrics dynamically in the V2 system?
> Thanks,
> Simon Cooper
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