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 Semantic Versioning.

Unreleased

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. https://github.com/dgraph-io/badger/commit/2e3a32f0ccac3066fb4206b28deb39c210c5266f
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