128 lines
4.2 KiB
ReStructuredText
128 lines
4.2 KiB
ReStructuredText
Changelog
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*********
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Version 0.5
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-----------
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Version 0.4
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-----------
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This version works with RocksDB v3.12.
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* Added :py:func:`repair_db`.
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* Added :py:meth:`rocksdb.Options.row_cache`
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* Publish to pypi.
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Backward Incompatible Changes:
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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* Changed API of :py:meth:`rocksdb.DB.compact_range`.
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* Only allow keyword arguments.
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* Changed ``reduce_level`` to ``change_level``.
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* Add new argument called ``bottommost_level_compaction``.
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Version 0.3
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-----------
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This version works with RocksDB version v3.11.
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Backward Incompatible Changes:
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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**Prefix Seeks:**
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According to this page https://github.com/facebook/rocksdb/wiki/Prefix-Seek-API-Changes,
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all the prefix related parameters on ``ReadOptions`` are removed.
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Rocksdb realizes now if ``Options.prefix_extractor`` is set and uses then
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prefix-seeks automatically. This means the following changes on pyrocksdb.
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* DB.iterkeys, DB.itervalues, DB.iteritems have *no* ``prefix`` parameter anymore.
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* DB.get, DB.multi_get, DB.key_may_exist, DB.iterkeys, DB.itervalues, DB.iteritems
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have *no* ``prefix_seek`` parameter anymore.
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Which means all the iterators walk now always to the *end* of the database.
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So if you need to stay within a prefix, write your own code to ensure that.
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For DB.iterkeys and DB.iteritems ``itertools.takewhile`` is a possible solution. ::
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from itertools import takewhile
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it = self.db.iterkeys()
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it.seek(b'00002')
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print list(takewhile(lambda key: key.startswith(b'00002'), it))
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it = self.db.iteritems()
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it.seek(b'00002')
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print dict(takewhile(lambda item: item[0].startswith(b'00002'), it))
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**SST Table Builders:**
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* Removed ``NewTotalOrderPlainTableFactory``, because rocksdb drops it too.
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**Changed Options:**
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In newer versions of rocksdb a bunch of options were moved or removed.
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* Rename ``bloom_bits_per_prefix`` of :py:class:`rocksdb.PlainTableFactory` to ``bloom_bits_per_key``
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* Removed ``Options.db_stats_log_interval``.
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* Removed ``Options.disable_seek_compaction``
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* Moved ``Options.no_block_cache`` to ``BlockBasedTableFactory``
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* Moved ``Options.block_size`` to ``BlockBasedTableFactory``
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* Moved ``Options.block_size_deviation`` to ``BlockBasedTableFactory``
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* Moved ``Options.block_restart_interval`` to ``BlockBasedTableFactory``
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* Moved ``Options.whole_key_filtering`` to ``BlockBasedTableFactory``
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* Removed ``Options.table_cache_remove_scan_count_limit``
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* Removed rm_scan_count_limit from ``LRUCache``
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New:
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^^^^
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* Make CompactRange available: :py:meth:`rocksdb.DB.compact_range`
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* Add init options to :py:class:`rocksdb.BlockBasedTableFactory`
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* Add more option to :py:class:`rocksdb.PlainTableFactory`
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* Add :py:class:`rocksdb.WriteBatchIterator`
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* add :py:attr:`rocksdb.CompressionType.lz4_compression`
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* add :py:attr:`rocksdb.CompressionType.lz4hc_compression`
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Version 0.2
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-----------
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This version works with RocksDB version 2.8.fb. Now you have access to the more
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advanced options of rocksdb. Like changing the memtable or SST representation.
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It is also possible now to enable *Universal Style Compaction*.
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* Fixed `issue 3 <https://github.com/stephan-hof/pyrocksdb/pull/3>`_.
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Which fixed the change of prefix_extractor from raw-pointer to smart-pointer.
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* Support the new :py:attr:`rocksdb.Options.verify_checksums_in_compaction` option.
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* Add :py:attr:`rocksdb.Options.table_factory` option. So you could use the new
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'PlainTableFactories' which are optimized for in-memory-databases.
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* https://github.com/facebook/rocksdb/wiki/PlainTable-Format
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* https://github.com/facebook/rocksdb/wiki/How-to-persist-in-memory-RocksDB-database%3F
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* Add :py:attr:`rocksdb.Options.memtable_factory` option.
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* Add options :py:attr:`rocksdb.Options.compaction_style` and
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:py:attr:`rocksdb.Options.compaction_options_universal` to change the
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compaction style.
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* Update documentation to the new default values
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* allow_mmap_reads=true
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* allow_mmap_writes=false
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* max_background_flushes=1
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* max_open_files=5000
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* paranoid_checks=true
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* disable_seek_compaction=true
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* level0_stop_writes_trigger=24
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* level0_slowdown_writes_trigger=20
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* Document new property names for :py:meth:`rocksdb.DB.get_property`.
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Version 0.1
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-----------
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Initial version. Works with rocksdb version 2.7.fb.
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