Fixed hot cache update on calls to Set() #11
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Tochemey
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Dec 25, 2024
Baliedge
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Dec 26, 2024
| @@ -6,7 +6,8 @@ $(GOLANGCI_LINT): ## Download Go linter | |||
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| .PHONY: ci | |||
| ci: tidy lint test | |||
| go mod tidy && git diff --exit-code | |||
| @echo | |||
| @echo "\033[32mEVERYTHING PASSED!\033[0m" | |||
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Seems like this might have been true 10+ years ago, The worst that could happen is they get some escape codes in their output. I don't think we should optimize for the odd chance someone is running this on a TSR compatible terminal.
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Purpose
@xWiiLLz Reported the hot cache's of remote peers were not updated when calling
Set(). mailgun/groupcache#69This PR fixes a long standing TODO where there was some question if the hot cache should always be updated on calls to
Set().Resolution
We should ALWAYS update the main cache and delete the key from the hot cache when
Set()is called.Rationale
We do not know when the owning peer may switch to a different node due to cluster topography changes. If an owner belongs to a different node the instant after
Set()completes, calls toGet(), consulting the hot cache, may find the previously set value.Because we don't know which or when a node in the cluster may become the owner, every node in the cluster should be treated identically.
I left the
hotCacheboolean in the signature ofSet()as I didn't want to make a version breaking change.