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CHANGELOG.md

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  • [ENHANCEMENT] Time-ovelapping blocks are now allowed. #370
    • Added MergeChunks function in chunkenc/xor.go to merge 2 time-overlapping chunks.
    • Added MergeOverlappingChunks function in chunks/chunks.go to merge multiple time-overlapping Chunk Metas.
    • Added MinTime and MaxTime method for BlockReader.
  • [CHANGE] NewLeveledCompactor takes a context so that a compaction is canceled when closing the db.
  • [ENHANCEMENT] When closing the db any running compaction will be cancelled so it doesn't block.
  • [CHANGE] prometheus_tsdb_storage_blocks_bytes_total is now prometheus_tsdb_storage_blocks_bytes

0.4.0

  • [CHANGE] New WALSegmentSize option to override the DefaultOptions.WALSegmentSize. Added to allow using smaller wal files. For example using tmpfs on a RPI to minimise the SD card wear out from the constant WAL writes. As part of this change the DefaultOptions.WALSegmentSize constant was also exposed.
  • [CHANGE] Empty blocks are not written during compaction #374
  • [FEATURE] Size base retention through Options.MaxBytes. As part of this change:
    • Added new metrics - prometheus_tsdb_storage_blocks_bytes_total, prometheus_tsdb_size_retentions_total, prometheus_tsdb_time_retentions_total
    • New public interface SizeReader: Size() int64
    • OpenBlock signature changed to take a logger.
  • [REMOVED] PrefixMatcher is considered unused so was removed.
  • [CLEANUP] Options.WALFlushInterval is removed as it wasn't used anywhere.
  • [FEATURE] Add new LiveReader to WAL pacakge. Added to allow live tailing of a WAL segment, used by Prometheus Remote Write after refactor. The main difference between the new reader and the existing Reader is that for LiveReader a call to Next() that returns false does not mean that there will never be more data to read.

0.3.1

  • [BUGFIX] Fixed most windows test and some actual bugs for unclosed file readers.

0.3.0

  • [CHANGE] LastCheckpoint() used to return just the segment name and now it returns the full relative path.
  • [CHANGE] NewSegmentsRangeReader() can now read over miltiple wal ranges by using the new SegmentRange{} struct.
  • [CHANGE] CorruptionErr{} now also exposes the Segment Dir which is added when displaying any errors.
  • [CHANGE] Head.Init() is changed to Head.Init(minValidTime int64)
  • [CHANGE] SymbolTable() renamed to SymbolTableSize() to make the name consistent with the Block{ symbolTableSize uint64 } field.
  • [CHANGE] wal.Reader{} now exposes Segment() for the current segment being read and Offset() for the current offset.
  • [FEATURE] tsdbutil analyze subcomand to find churn, high cardinality, etc.