DImuthuUpe commented on issue #323: [HELIX-817] Support for multiple instance group tags for Job config URL: https://github.com/apache/helix/issues/323#issuecomment-505127003 @jiajunwang Good question. We can add tags to instances as much as we want. But the problem is, is it scalable? I'm not sure whether there is a straightforward way to update the instance config tag dynamically with out restarting participants. I usually set the tag by calling InstanceConfig.addTag(tag). In my use case, I need to dynamically set the target instance / group for a job based on some other external metrics. In that case it would be easy to manipulate the tags at JobConfig level rather than InstanceConfig level.
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