Specifying stream max-age/metadata during projection emit

EventStoreDB
1

Hi

We are using eventstore to store the results of chef runs across our server estate, and then using this in a projection to emit events to a stream for each server.

However, our disk usage is on a continual upward trend, and we really dont care too much about the information after a few months.

At the event store event the other week, James mentioned that its possible to specify the max age during an emit call.

I’ve found https://github.com/EventStore/EventStore/blob/f0e38e85aa473b7b4c57f1e413661da86e828e31/src/EventStore.Projections.Core/Prelude/1Prelude.js#L231, but not 100% sure how to use it.

Can anyone share an example of how this would be done?

While I am at it, would this be a better use case for linked events rather than emitting new events? (and would setting the metadata be the same in this case?)

Many thanks,

Matt

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2

You cannot as of now emit stream metadata from projections and would
need to do it from the outside. There is a card for allowing this.

3

@Greg_Young1is this feature available now?

4

ahsen,

This might be similar to an issue I opened;

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