Have an option to combine messages in emqtt plugin

[jvrahav]

Hi,

Im using the emqtt output plugin to send data from telegraf to emqtt. The plugin posts multiple messages for the same plugin in a collection cycle.

It would be great to combine multiple messages posted by a plugin into one message. This will help us reduce the number of messages that are being published to emqtt.

Thanks,
Rahav

[danielnelson]

I think this could be useful for all/most of the queue outputs, and potentially other outputs. I haven't thought about it extensively but perhaps we could introduce per output batch sizes.

[jvrahav]

I have a change made for this w.r.t to emqtt plugin. I tried creating a branch and pushing my changes to the branch. I got a 403 error. Can you let me know what is the process to submit a change for review

[russorat]

@jvrahav please follow the instructions here: #2468 (comment) or in the CONTRIBUTING.md file

[jvrahav]

@russorat thanks for pointing that out the instructions

@danielnelson i have raised a PR #4094 for this change, though this only impacts mqtt ouput writter as every output writer might have a different need related to batching messages

[danielnelson]

Added in 1.7.0