load: Add "weight" load variant #695
Open
+266
−4
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Adds a
weight
load variant, which weights an inner load. This is useful in circumstances where it is desireable to artificially inflate or deflate load. One such example is canary deployments, where it might be preferable for a canary to accept less load than its non-canary counterparts.This change is adapted from the weight implementation that used to exist within tower but was removed (see a496fbf) and an associated unmerged PR (#282).
Some additional discussion around this in #696