add description of active and parital blocks and modify changelog

Signed-off-by: Wen Xu <wenxuamz@amazon.com>
thanos-io · Nov 21, 2023 · 44819ea · 44819ea
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -17,6 +17,7 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 ### Added
 
 - [#6891](https://github.com/thanos-io/thanos/pull/6891) Objstore: Bump `objstore` which adds support for Azure Workload Identity.
+- [#6902](https://github.com/thanos-io/thanos/pull/6902) Fetcher: Add a BlockIDsFetcher Interface to BaseFetcher
 
 ### Changed
 

diff --git a/pkg/block/fetcher.go b/pkg/block/fetcher.go
@@ -173,6 +173,7 @@ func DefaultModifiedLabelValues() [][]string {
 // Fetcher interface to retieve blockId information from a bucket.
 type BlockIDsFetcher interface {
 	//Get active blocksIds returning it via channel (streaming) and response.
+	//Here active blocks are blocks which contain meta.json, while partial blocks are blocks without meta.json
 	GetActiveAndPartialBlockIDs(ctx context.Context, ch chan<- ulid.ULID) (partialBlocks map[ulid.ULID]bool, err error)
 }