v0.2.2

Fixed

• Fixed a hypothetical locking deadlock if transactions for trees passed into
  State::new_transaction or Roots::new_transaction in a consistent order.

v0.2.1

Fixed

• Removing a key in a versioned tree would cause subsequent scan() operations
  to fail if the key evaluator requested reading data from key that has no
  current data. A safeguard has been put in place to ensure that even if
  KeyEvaluation::ReadData is returned on an index that contains no position it
  will skip the operation rather than attempting to read data from the start of
  the file.

  Updating the crate should restore access to any "broken" files.

v0.2.0

Breaking Changes

• tree::State::read() now returns an Arc containing the state, rather than a
  read guard. This change has no noticable impact on microbenchmarks, but yields
  more fair writing performance under heavy-read conditions -- something the
  current microbenchmarks don't test but in-development Commerce Benchmark for
  BonsaiDb unvieled.
• Buffer has been renamed to ArcBytes. This type has been extracted into its
  own crate, allowing it to be used in bonsaidb::core. The new crate is
  available here.
• Root::scan, Tree::scan, Tree::get_range, TransactionTree::scan, and
  TransactionTree::get_range now take types that implement
  RangeBounds<&[u8]>. BorrowByteRange is a trait that can be used to help
  borrow ranges of owned data.

Added

• nebari::tree::U64Range has been exposed. This type makes it easier to work
  with ranges of u64s.

v0.1.1

Added

• Tree::replace has been added, which calls through to TransactionTree::replace.
• Tree::modify and TransactionTree::modify have been added, which execute a
  lower-level modification on the underlying tree.

v0.1.0

This release signifies that we believe Nebari is stable enough that other projects could use it. While it's had a fair amount of internal testing while developing BonsaiDb, it should still be considered alpha and used with caution.

Any breaking file format changes from this point forward will result in major version number increments.