mirror of https://github.com/prometheus/prometheus
2fa647f50b
* Test for a previous implematation of Intersect
Before we were moving the postings list everytime we create a new
chained `intersectPostings`. That was causing some postings to be
skipped. This test fails on the older version.
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
* Advance on Seek only when valid.
Issue:
Before in mergedPostings and others we advance everytime we `Seek`,
which causes issues with `Intersect`.
Take the case, where we have a mergedPostings = m merging, a: {10, 20, 30} and
b: {15, 25, 35}. Everytime we `Seek`, we do a.Seek and b.Seek.
Now if we Intersect m with {21, 22, 23, 30}, we would do Seek({21,22,23}) which
would advance a and b beyond 30.
Fix:
Now we advance only when the seeking value is greater than the current
value, as the definition specifies.
Also, posting 0 will not be a valid posting and will be used to signal
finished or un-initialized PostingsList.
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
* Add test for Merge+Intersect edgecase.
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
* Add comments to trivial tests.
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
|
||
|---|---|---|
| Documentation/format | ||
| chunks | ||
| cmd/tsdb | ||
| labels | ||
| test | ||
| testdata | ||
| tsdbutil | ||
| .travis.yml | ||
| LICENSE | ||
| README.md | ||
| block.go | ||
| chunks.go | ||
| chunks_test.go | ||
| compact.go | ||
| db.go | ||
| db_test.go | ||
| db_unix.go | ||
| db_windows.go | ||
| encoding_helpers.go | ||
| head.go | ||
| head_test.go | ||
| index.go | ||
| index_test.go | ||
| postings.go | ||
| postings_test.go | ||
| querier.go | ||
| querier_test.go | ||
| wal.go | ||
| wal_test.go | ||
README.md
TSDB
This repository contains the new Prometheus storage layer that will be used in its 2.0 release.
A writeup of its design can be found here.