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* Add range query test cases This includes a couple of failing ones that double count some points due to the iterator seek bug. Co-authored-by: Oleg Zaytsev <mail@olegzaytsev.com> Signed-off-by: Fiona Liao <fiona.y.liao@gmail.com> * Add Seek() implementation for memSafeIterator Previously, calling memSafeIterator.Seek() would call the Seek() method on its embedded iterator. This was causing the embedded iterator and the memSafeIterator to get out of sync because when the embedded Seek() moved to the next element of the embedded iterator, memSafeIterator didn't "know" about it. memSafeIterator has to "know" when the embedded iterator has moved to be able to work out when it should be reading from its buffer rather than the embedded iterator. Used same logic as for xorIterator.Seek() (which in runtime is used as the embedded iterator) - return false if the iterator has an error and try to move to next element if the required time hasn't been reached, or if no elements have been read yet. The memSafeIterator.Next() method is being called so memSafeIterator.i is always accurate. Signed-off-by: Fiona Liao <fiona.y.liao@gmail.com> * Add tsdb package test Signed-off-by: Fiona Liao <fiona.y.liao@gmail.com> Co-authored-by: Oleg Zaytsev <mail@olegzaytsev.com>
TSDB
This directory contains the Prometheus storage layer that is used in its 2.x releases.
A writeup of its design can be found here.
Based on the Gorilla TSDB white papers.
Video: Storing 16 Bytes at Scale from PromCon 2017.
See also the format documentation.
A series of blog posts explaining different components of TSDB: