The Prometheus monitoring system and time series database.

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Marco Pracucci 501bc6419e Add ShardedPostings() support to TSDB (#10421) ... This PR is a reference implementation of the proposal described in #10420. In addition to what described in #10420, in this PR I've introduced labels.StableHash(). The idea is to offer an hashing function which doesn't change over time, and that's used by query sharding in order to get a stable behaviour over time. The implementation of labels.StableHash() is the hashing function used by Prometheus before stringlabels, and what's used by Grafana Mimir for query sharding (because built before stringlabels was a thing). Follow up work As mentioned in #10420, if this PR is accepted I'm also open to upload another foundamental piece used by Grafana Mimir query sharding to accelerate the query execution: an optional, configurable and fast in-memory cache for the series hashes. Signed-off-by: Marco Pracucci <marco@pracucci.com>		2 years ago
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exemplar	Scraping: use slices.sort for exemplars	2 years ago
histogram	Optimize histogram iterators (#13340)	2 years ago
labels	Add ShardedPostings() support to TSDB (#10421)	2 years ago
metadata	Move metric type definitions to common/model	2 years ago
relabel	relabel: blank replacement deletes label post-regexp	2 years ago
rulefmt	golangci-lint: enable testifylint linter (#13254)	2 years ago
textparse	Merge pull request #13299 from vesari/add-unit-parser	2 years ago
timestamp	Move packages out of deprecated pkg directory	4 years ago
value	Move packages out of deprecated pkg directory	4 years ago