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Danny Kopping 33e44ed39d Ruler: remote rule evaluation (#8744) ... **What this PR does / why we need it**: Adds the ability to evaluate recording & alerting rules against a given `query-frontend`, allowing these queries to be executed with all the parallelisation & optimisation that regular adhoc queries have. This is important because with `local` evaluation all queries are single-threaded, and rules that evaluate a large range/volume of data may timeout or OOM the `ruler` itself, leading to missed metrics or alerts. When `remote` evaluation mode is enabled, the `ruler` effectively just becomes a gRPC client for the `query-frontend`, which will dramatically improve the reliability of the `ruler` and also drastically reduce its resource requirements. **Which issue(s) this PR fixes**: This PR implements the feature discussed in https://github.com/grafana/loki/pull/8129 (**LID 0002: Remote Rule Evaluation**).		3 years ago
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merger.go	Ruler: remote rule evaluation (#8744)	3 years ago