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metacache: Allow prefix filtering (#10920)

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Do listings with prefix filter when bloom filter is dirty.

This will forward the prefix filter to the lister which will make it 
only scan the folders/objects with the specified prefix.

If we have a clean bloom filter we try to build a more generally 
useful cache so in that case, we will list all objects/folders.
This commit is contained in:
Klaus Post
2020-11-18 10:44:18 -08:00
committed by GitHub
parent e413f05397
commit 990d074f7d
8 changed files with 98 additions and 11 deletions
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cmd/metacache-bucket.go
+4
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@@ -228,6 +228,10 @@ func (b *bucketMetacache) findCache(o listPathOptions) metacache {
debugPrint("cache %s prefix mismatch, cached:%v, want:%v", cached.id, cached.root, o.BaseDir)
continue
}
if cached.filter != "" && strings.HasPrefix(cached.filter, o.FilterPrefix) {
debugPrint("cache %s cannot be used because of filter %s", cached.id, cached.filter)
continue
}
// If the existing listing wasn't recursive root must match.
if !cached.recursive && o.BaseDir != cached.root {
debugPrint("cache %s non rec prefix mismatch, cached:%v, want:%v", cached.id, cached.root, o.BaseDir)