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Fix handling of empty chunkDescs while preloading chunks.

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Change-Id: I73ce89fe0ef90c6eda78218e5be2cbfa0207c364
This commit is contained in:
Bjoern Rabenstein 2014-10-14 18:23:32 +02:00
parent ecee5d8281
commit 427c8d53a5
2 changed files with 14 additions and 15 deletions
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27
storage/local/series.go
View file

@ -431,24 +431,23 @@ func (s *memorySeries) preloadChunksAtTime(t clientmodel.Timestamp, p *persisten
} }
*/ */
// loadChunkDescs is an internal helper method. // preloadChunksForRange loads chunks for the given range from the persistence.
func (s *memorySeries) loadChunkDescs(p *persistence) error { // The caller must have locked the fingerprint of the series.
cds, err := p.loadChunkDescs(s.metric.Fingerprint(), s.chunkDescs[0].firstTime()) func (s *memorySeries) preloadChunksForRange(
from clientmodel.Timestamp, through clientmodel.Timestamp,
fp clientmodel.Fingerprint, p *persistence,
) (chunkDescs, error) {
firstChunkDescTime := through
if len(s.chunkDescs) > 0 {
firstChunkDescTime = s.chunkDescs[0].firstTime()
}
if !s.chunkDescsLoaded && from.Before(firstChunkDescTime) {
cds, err := p.loadChunkDescs(fp, firstChunkDescTime)
if err != nil { if err != nil {
return err return nil, err
} }
s.chunkDescs = append(cds, s.chunkDescs...) s.chunkDescs = append(cds, s.chunkDescs...)
s.chunkDescsLoaded = true s.chunkDescsLoaded = true
return nil
}
// preloadChunksForRange loads chunks for the given range from the persistence.
// The caller must have locked the fingerprint of the series.
func (s *memorySeries) preloadChunksForRange(from clientmodel.Timestamp, through clientmodel.Timestamp, p *persistence) (chunkDescs, error) {
if !s.chunkDescsLoaded && (len(s.chunkDescs) == 0 || from.Before(s.chunkDescs[0].firstTime())) {
if err := s.loadChunkDescs(p); err != nil {
return nil, err
}
} }
if len(s.chunkDescs) == 0 { if len(s.chunkDescs) == 0 {

2
storage/local/storage.go
View file

@ -175,7 +175,7 @@ func (s *memorySeriesStorage) preloadChunksForRange(fp clientmodel.Fingerprint,
return nil, nil return nil, nil
} }
} }
return series.preloadChunksForRange(from, through, s.persistence) return series.preloadChunksForRange(from, through, fp, s.persistence)
} }
// NewIterator implements storage. // NewIterator implements storage.