prometheus/CHANGELOG.md

master / unreleased

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.