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72 lines
3.3 KiB
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72 lines
3.3 KiB
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#############
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Release Notes
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FoundationDB Alpha 6
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====================
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Platform support
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----------------
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* FoundationDB now supports both clients and development servers on :doc:`Mac OS X </getting-started-mac>`.
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* FoundationDB now supports both clients and development servers on (64-bit) Windows.
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* All language APIs are supported on Linux, Mac, and Windows (except for Ruby on Windows, because there is not a 64-bit Ruby for Windows.)
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Features
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--------
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* The set of coordination servers can be safely :ref:`changed <configuration-changing-coordination-servers>` on-the-fly via the CLI.
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* Unintentional deletion of the coordination state files is now ACID-safe and self-correcting when a majority of the state files still exist.
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* The :ref:`foundationdb.conf <foundationdb-conf>` file format has changed.
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* A new more flexible and automatic system for :ref:`network configuration <foundationdb-conf-fdbserver>`. Common server setups will auto-configure using the cluster file. More advanced setups are supported via separate configurable listen and public addresses.
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* The CLI now support tab-completion.
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* The CLI now supports setting transaction options
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* The CLI has a new command "getrangekeys" that returns the keys in a range and omits the values.
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* The database size estimate shown in the CLI status is much more accurate.
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Performance
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-----------
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* Improved latency performance for intense workloads with range-read operations.
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* Improved performance and decreased memory usage for certain intense write workloads targeting a small set of keys (such as sequential insert).
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Fixes
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-----
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* An incorrect result could be returned by a range read when: (1) The range start was specified using a non-default "less than" type key selector; and (2) the range read started at the beginning of the database; and (3) the transaction also included a prior write to a key less than the key of the begin key selector.
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* In certain cases a FoundationDB cluster would not correctly re-configure itself to achieve a more optimal usage of servers of specific machine classes.
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Changes to all APIs
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-------------------
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* The API version has been updated from 14 to 16. (Thanks to our API versioning technology, programs requesting API version 14 will work unmodified.)
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* Calling the :py:meth:`reset <fdb.Transaction.reset>` method of a transaction now also resets transaction options.
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* :ref:`System keys <system-keys>` (those beginning with the byte ``0xFF``) are now inaccessible by default.
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* Simpler network setup: The network connection options are no longer necessary and have been deprecated.
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* Three new transaction options (:py:meth:`READ_AHEAD_DISABLE <fdb.Transaction.options.set_read_ahead_disable>`, :py:meth:`READ_YOUR_WRITES_DISABLE <fdb.Transaction.options.set_read_your_writes_disable>`, and :py:meth:`ACCESS_SYSTEM_KEYS <fdb.Transaction.options.set_access_system_keys>`) enable more control for advanced applications.
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Changes to the Java API
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-----------------------
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* A new construct `AsyncUtil.whileTrue() <../javadoc/com/apple/cie/foundationdb/async/AsyncUtil.html#whileTrue-com.apple.foundationdb.async.Function->`_ simplifies writing loops using the asynchronous version of the Java FDB client.
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Earlier release notes
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---------------------
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For changes in alpha 5, see :doc:`Release Notes (Alpha 5) <release-notes-014>`.
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