meditime/vendor/github.com/dgraph-io/badger/CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Serialization Versioning.

Unreleased

1.6.2 - 2020-09-10

Fixed

• Fix Sequence generates duplicate values (#1281)
• Ensure bitValuePointer flag is cleared for LSM entry values written to LSM (#1313)
• Confirm badgerMove entry required before rewrite (#1302)
• Drop move keys when its key prefix is dropped (#1331)
• Compaction: Expired keys and delete markers are never purged (#1354)
• Restore: Account for value size as well (#1358)
• GC: Consider size of value while rewriting (#1357)
• Rework DB.DropPrefix (#1381)
• Update head while replaying value log (#1372)
• Remove vlog file if bootstrap, syncDir or mmap fails (#1434)
• Levels: Compaction incorrectly drops some delete markers (#1422)
• Fix(replay) - Update head for LSM entries also (#1456)
• Fix(Backup/Restore): Keep all versions (#1462)
• Fix build on Plan 9 (#1451)

1.6.1 - 2020-03-26

New APIs

• Badger.DB
  • NewWriteBatchAt (#948)
• Badger.Options
  • WithEventLogging (#1035)
  • WithVerifyValueChecksum (#1052)
  • WithBypassLockGuard (#1243)

Features

• Support checksum verification for values read from vlog (#1052)
• Add EventLogging option (#1035)
• Support WriteBatch API in managed mode (#948)
• Add support for watching nil prefix in Subscribe API (#1246)

Fixed

• Initialize vlog before starting compactions in db.Open (#1226)
• Fix int overflow for 32bit (#1216)
• Remove the 'this entry should've caught' log from value.go (#1170)
• Fix merge iterator duplicates issue (#1157)
• Fix segmentation fault in vlog.Read (header.Decode) (#1150)
• Fix VerifyValueChecksum checks (#1138)
• Fix windows dataloss issue (#1134)
• Fix request increment ref bug (#1121)
• Limit manifest's change set size (#1119)
• Fix deadlock in discard stats (#1070)
• Acquire lock before unmapping vlog files (#1050)
• Set move key's expiresAt for keys with TTL (#1006)
• Fix deadlock when flushing discard stats. (#976)
• Fix table.Smallest/Biggest and iterator Prefix bug (#997)
• Fix boundaries on GC batch size (#987)
• Lock log file before munmap (#949)
• VlogSize to store correct directory name to expvar.Map (#956)
• Fix transaction too big issue in restore (#957)
• Fix race condition in updateDiscardStats (#973)
• Cast results of len to uint32 to fix compilation in i386 arch. (#961)
• Drop discard stats if we can't unmarshal it (#936)
• Open all vlog files in RDWR mode (#923)
• Fix race condition in flushDiscardStats function (#921)
• Ensure rewrite in vlog is within transactional limits (#911)
• Fix prefix bug in key iterator and allow all versions (#950)
• Fix discard stats moved by GC bug (#929)

Performance

• Use fastRand instead of locked-rand in skiplist (#1173)
• Fix checkOverlap in compaction (#1166)
• Optimize createTable in stream_writer.go (#1132)
• Add capacity to slice creation when capacity is known (#1103)
• Introduce fast merge iterator (#1080)
• Introduce StreamDone in Stream Writer (#1061)
• Flush vlog buffer if it grows beyond threshold (#1067)
• Binary search based table picker (#983)
• Making the stream writer APIs goroutine-safe (#959)
• Replace FarmHash with AESHash for Oracle conflicts (#952)
• Change file picking strategy in compaction (#894)
• Use trie for prefix matching (#851)
• Fix busy-wait loop in Watermark (#920)

1.6.0 - 2019-07-01

This is a release including almost 200 commits, so expect many changes - some of them not backward compatible.

Regarding backward compatibility in Badger versions, you might be interested on reading VERSIONING.md.

Note: The hashes in parentheses correspond to the commits that impacted the given feature.

New APIs

• badger.DB

  • DropPrefix (291295e)
  • Flatten (7e41bba)
  • KeySplits (4751ef1)
  • MaxBatchCount (b65e2a3)
  • MaxBatchSize (b65e2a3)
  • PrintKeyValueHistogram (fd59907)
  • Subscribe (26128a7)
  • Sync (851e462)

• badger.DefaultOptions() and badger.LSMOnlyOptions() (91ce687)

  • badger.Options.WithX methods

• badger.Entry (e9447c9)

  • NewEntry
  • WithMeta
  • WithDiscard
  • WithTTL

• badger.Item

  • KeySize (fd59907)
  • ValueSize (5242a99)

• badger.IteratorOptions

  • PickTable (7d46029, 49a49e3)
  • Prefix (7d46029)

• badger.Logger (fbb2778)

• badger.Options

  • CompactL0OnClose (7e41bba)
  • Logger (3f66663)
  • LogRotatesToFlush (2237832)

• badger.Stream (14cbd89, 3258067)

• badger.StreamWriter (7116e16)

• badger.TableInfo.KeyCount (fd59907)

• badger.TableManifest (2017987)

• badger.Tx.NewKeyIterator (49a49e3)

• badger.WriteBatch (6daccf9, 7e78e80)

Modified APIs

Breaking changes:

• badger.DefaultOptions and badger.LSMOnlyOptions are now functions rather than variables (91ce687)
• badger.Item.Value now receives a function that returns an error (439fd46)
• badger.Txn.Commit doesn't receive any params now (6daccf9)
• badger.DB.Tables now receives a boolean (76b5341)

Not breaking changes:

• badger.LSMOptions changed values (799c33f)
• badger.DB.NewIterator now allows multiple iterators per RO txn (41d9656)
• badger.Options.TableLoadingMode's new default is options.MemoryMap (6b97bac)

Removed APIs

• badger.ManagedDB (d22c0e8)
• badger.Options.DoNotCompact (7e41bba)
• badger.Txn.SetWithX (e9447c9)

Tools:

• badger bank disect (13db058)
• badger bank test (13db058) --mmap (03870e3)
• badger fill (7e41bba)
• badger flatten (7e41bba)
• badger info --histogram (fd59907) --history --lookup --show-keys --show-meta --with-prefix (09e9b63) --show-internal (fb2eed9)
• badger benchmark read (239041e)
• badger benchmark write (6d3b67d)

1.5.5 - 2019-06-20

• Introduce support for Go Modules

1.5.3 - 2018-07-11

Bug Fixes:

• Fix a panic caused due to item.vptr not copying over vs.Value, when looking for a move key.

1.5.2 - 2018-06-19

Bug Fixes:

• Fix the way move key gets generated.

• If a transaction has unclosed, or multiple iterators running simultaneously, throw a panic. Every iterator must be properly closed. At any point in time, only one iterator per transaction can be running. This is to avoid bugs in a transaction data structure which is thread unsafe.

• Warning: This change might cause panics in user code. Fix is to properly close your iterators, and only have one running at a time per transaction.

1.5.1 - 2018-06-04

Bug Fixes:

• Fix for infinite yieldItemValue recursion. #503
• Fix recursive addition of badgerMove prefix. 2e3a32f0cc
• Use file size based window size for sampling, instead of fixing it to 10MB. #501

Cleanup:

• Clarify comments and documentation.
• Move badger tool one directory level up.

1.5.0 - 2018-05-08

• Introduce NumVersionsToKeep option. This option is used to discard many versions of the same key, which saves space.
• Add a new SetWithDiscard method, which would indicate that all the older versions of the key are now invalid. Those versions would be discarded during compactions.
• Value log GC moves are now bound to another keyspace to ensure latest versions of data are always at the top in LSM tree.
• Introduce ValueLogMaxEntries to restrict the number of key-value pairs per value log file. This helps bound the time it takes to garbage collect one file.

1.4.0 - 2018-05-04

• Make mmap-ing of value log optional.
• Run GC multiple times, based on recorded discard statistics.
• Add MergeOperator.
• Force compact L0 on clsoe (#439).
• Add truncate option to warn about data loss (#452).
• Discard key versions during compaction (#464).
• Introduce new LSMOnlyOptions, to make Badger act like a typical LSM based DB.

Bug fix:

• (Temporary) Check max version across all tables in Get (removed in next release).
• Update commit and read ts while loading from backup.
• Ensure all transaction entries are part of the same value log file.
• On commit, run unlock callbacks before doing writes (#413).
• Wait for goroutines to finish before closing iterators (#421).

1.3.0 - 2017-12-12

• Add DB.NextSequence() method to generate monotonically increasing integer sequences.
• Add DB.Size() method to return the size of LSM and value log files.
• Tweaked mmap code to make Windows 32-bit builds work.
• Tweaked build tags on some files to make iOS builds work.
• Fix DB.PurgeOlderVersions() to not violate some constraints.

1.2.0 - 2017-11-30

• Expose a Txn.SetEntry() method to allow setting the key-value pair and all the metadata at the same time.

1.1.1 - 2017-11-28

• Fix bug where txn.Get was returing key deleted in same transaction.
• Fix race condition while decrementing reference in oracle.
• Update doneCommit in the callback for CommitAsync.
• Iterator see writes of current txn.

1.1.0 - 2017-11-13

• Create Badger directory if it does not exist when badger.Open is called.
• Added Item.ValueCopy() to avoid deadlocks in long-running iterations
• Fixed 64-bit alignment issues to make Badger run on Arm v7

1.0.1 - 2017-11-06

• Fix an uint16 overflow when resizing key slice