Carrie Edwards abb5a2f947 Add histogram chunk encoding with Start Timestamp support (#18609) ... * Add histogram chunk encoding with Start Timestamp support Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Update documentation Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Add more tests Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Fix for appendHistogram Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Linting Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Fix start timestamp for histogram samples in TestCompactingChunkSeriesMerger Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Refactor and reduce code duplication Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Move counter reset hint bits into sample count field Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Fix bug with counter reset header Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Clean up docs Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Address feedback Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Lint Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Refactor to use generic appenders Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Update to include changes to histogram appenders Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Address feedback Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * tsdb: add histograms-st-encoding feature flag (#18912) * tsdb: add histograms-st-encoding feature flag Decouple the ST-capable histogram chunk encodings (EncHistogramST, EncFloatHistogramST) from the xor2-encoding feature flag and gate them behind a new histograms-st-encoding flag instead. Previously --enable-feature=xor2-encoding turned on both the float XOR2 encoding and the histogram ST encodings via a single useXOR2 boolean; that conflated two independent on-disk formats and made it impossible to opt into one without the other. ValueType.ChunkEncoding and NewChunk now take separate useXOR2 and useHistogramST flags. Dispatch only consumes the relevant flag per value type; data-driven callers that gate on actual ST presence in the samples (storage/series.go, tsdb/querier.go, tsdb/chunks/chunks.go) pass hasST for both. tsdb.Options gains EnableHistogramSTEncoding; tsdb.HeadOptions gains a matching atomic.Bool. The new flag is propagated through chunkOpts/headAppenderBase and read at every site that currently reads EnableXOR2Encoding (head append v1/v2, head_wal WAL/WBL replay, ooo_head_read). Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com> Signed-off-by: George Krajcsovits <krajorama@users.noreply.github.com> * Address feedback Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Fix histogram tests Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Fix histogram ST PromQL tests Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> * Fixes for promQL tests Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> --------- Signed-off-by: Carrie Edwards <edwrdscarrie@gmail.com> Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com> Signed-off-by: George Krajcsovits <krajorama@users.noreply.github.com> Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com>		2026-06-30 10:30:29 -07:00
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format	Add histogram chunk encoding with Start Timestamp support (#18609)	2026-06-30 10:30:29 -07:00
bstream.md	improve bstream comments and doc (#9560)	2021-10-25 18:44:15 +05:30
refs.md	Update godoc links and remove note about TSDB versioning (#10754)	2022-05-26 18:34:43 +10:00
usage.md	Fix language in docs and comments (#14041)	2024-05-08 17:57:09 +02:00