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Description:

arctic 1.82.2

Development moved to ArcticDB GitHub Repository
This repository and project are now in maintenance mode. Development has migrated to ArcticDB.

Information on how to set up, install and use Arctic has been moved to README-arctic.md.
Changelog
1.82.2 (2024-02-01)

Release: #1022 Prepare release 1.82.2
Perf: #1021 Improve performance of Tickstore read
Bugfix: #1019 Remove failing requirements.txt versions
Docs: #1019 Updated links to ArcticDB website and docs
Docs: #1017 Fix doc for chunkstore's list_symbols

1.82.1 (2023-10-09)

Release: #1014 Prepare release 1.82.1
Bugfix: #1013 Fix serialized tz name for index timezones of dateutil.timezone.tzutc()
Bugfix: #1013 Fix serialized tz name for single-level index timezones of dateutil.timezone.gettz("UTC")

1.82.0 (2023-07-24)

Release: #1012 version 1.82.0
Compatibility: update pinning from pandas<1.1, to pandas<2
Compatibility: update pinning from numpy<1.19 to numpy<2
Build: specify which version of python/numpy/pandas to test
Bugfix: #887 #928 resolve import error on pandas.Panel, Panel was removed in pandas 1.0
Bugfix: fix pandas get_timezone() argument cannot be None
Bugfix: fix np.float/np.int/np.book depreciations
Bugfix: fix numpy tostring() is deprecated. Use tobytes() instead.
Bugfix: numpy.testing.utils is deprecated
Bugfix: pandas.util.testing is deprecated
Cleanup: remove async_benchmark

1.81.2 (2023-05-11)

Feature: #1000, #1001, #1002, #1003, #1007, #1008 ArcticDB docs, links etc
Bugfix: #1009 force CircleCI to install tzlocal==4.2

1.81.1 (2023-03-13)

Feature: #996 release wheel to pypi as well as tar.gz, egg.

1.81.0 (2023-03-10)

Bugfix: #979 fix circleci mongo install
Feature: #980 get testpack running with mongod 4.4.18
Bugfix: #985 suppress FutureWarning for Panel import
Bugfix: #989 VersionStore slow snapshot delete add new index
Bugfix: #806, #990 DateTimeIndex tz serialization

1.80.5 (2022-09-05)

Feature: #950 remove all traces of python 2.7 and six package
Feature: #959 add python 3.8 support
Feature: #962 pin pandas<1.1.0, numpy<1.19.0

1.80.4 (2022-01-25)

Bugfix: #940 fix rows per chunk causing divide by zero
Feature: #943 check markdown rendering of README.md and CHANGES.md in build
Bugfix: #946 move test dependencies to tests_require

1.80.3 (2022-01-20)

Feature: #941 use named index for VersionStore to avoid 127 max fully qualified index name
Bugfix: #935, #936 fixed README.md rendering which was preventing pypi upload

1.80.2 (2022-01-10)

Bugfix: #932 revert serialization-optimization (#909, #910)

1.80.1 (2021-12-09)

Bugfix: #855 use IXSCAN for list_symbols which speeds up snapshotting (actually #856)
Bugfix: #926 avoid pathologically slow count_documents() call with pymongo > 3.6.0

1.80.0 (2021-10-28)

Feature: #919 Add CircleCI badge to README.md
Feature: #917 Add CircleCI build
Bugfix: #910 Fix column subsetting bug
Bugfix: #909 Speedup FrameToArray serialiser for ChunkStore by removing intermediate DataFrame construction
Bugfix: #902 Chunkstore-read-speedup
Bugfix: #872 Do not spam if not permissioned on cache db
Bugfix: #874 Pickle protocol 5 not supported in 3.7 and below
Bugfix: Handle uninitialized cache object
Feature: #897 Pin numpy 1.18.4
Feature: #897 Pin pandas 1.0.3
Bugfix: #881 Fix for issue #815
Bugfix: #875 Fix flake8 errors

1.79.4 (2020-12-01)

Bugfix: Update code to work with latest version of pandas
Bugfix: Fix missing column handling in numpy serializer

1.79.3 (2019-12-6)

Bugfix: #832 Bytes to unicode for pd.Series
Feature: #825 Max BSON size configurable
Bugfix: #823 Don't retry bulk write errors
Feature: #802 kwargs passed through to iterators in chunkstore

1.79.2 (2019-05-21)

Feature: Allow list_library caching to be tunable via a settings collection.
Bugfix: #777: Handle empty columns in dataframes

1.79.1 (2019-05-03)

Bugfix: Pandas convert multiindexes to unicode if flag set.

1.79 (2019-05-02)

Bugfix: #765 Pandas data columns require encoding to convert to unicode.

1.78 (2019-05-02)

Bugfix: Use the default encoding (ascii) instead of bytes for unpickling.

1.77 (2019-05-01)

Bugfix: pypandoc not rendering README correctly for PYPI
Bugfix: #744 get_info on an empty dataframe raises an exception
Bugfix: #751 Handle unpickling py2 datetime and other object types with latin1
Bugfix: #598 Add an option to convert py2 str to py3 str (unicode type) on read.

1.74 (2019-02-28)

Bugfix: #712 Pandas deprecation warning in chunkstore serializer
BugFix: #670 Lots of pycodestyle fixes
BugFix: #691 Fix arrays_to_mgr for pandas 0.23.4+
BugFix: #698 Fix no handler in logging warning
BugFix: #705 Use sort_index instead of sortlevel_
BugFix: #710: Initialize SEGMENT_SHA in versions for writes and appends
Feature: #669 Experimental initial implementation of async arctic
Feature: #704 Do not enable sharding by default in BSONStore.
Feature: #688 Remove Chunkstore check for issue #422
Feature: #717 Add a best effort cache for list_libraries
Bugfix: #722 Exception while reading a column from chunkstore with a column missing in the chunk

1.73 (2018-11-27)

Bugfix: #658 Write/append errors for Panel objects from older pandas versions
Feature: #653 Add version meta-info in arctic module
Feature: #663 Include arctic numerical version in the metadata of the version document
Feature: #650 Implemented forward pointers for chunks in VersionStore (modes: enabled/disabled/hybrid)

1.72 (2018-11-06)

Feature: #577 Added implementation for incremental serializer for numpy records
Bugfix: #648 Fix issue with Timezone aware Pandas types, which don't contain hasobject attribute

1.71 (2018-11-05)

Bugfix: #645 Fix write errors for Pandas DataFrame that has mixed object/string types in multi-index column

1.70 (2018-10-30)

Bugfix: #157 Assure that serialized dataframes remain value-equivalent (e.g. avoid NaN --> 'nan' in mixed string columns)
Bugfix: #608 Ensure Arctic performs well with MongoDB 3.6 (sorting)
Bugfix: #629 Column kwarg no longer modified
Bugfix: #641 DateRange.intersection open/closed range fix
Feature: #493 Can pass kwargs when calling MongoClient, e.g. for ssl
Feature: #590 Faster write handler selection for DataFrames with objects
Feature: #604 Improved handling handling for pickling serialization decidions

1.69 (2018-09-12)

Docs: VersionStore documentation
Bugfix: Issue #612 ThreadPool should be created by process using it
Feature: Upsert option on appends in ChunkStore

1.68 (2018-08-17)

Feature: #553 Compatibility with both the new and old LZ4 API
Feature: #571 Removed the Cython LZ4 code, use the latest python-lz4
Feature: #557 Threadpool based compression. Speed imrpovement and tuning benchmarks.
Bugfix: fix tickstore unicode handling, support both unicode and utf-8 arrays
Bugfix: #591 Fix tickstore reads not returning index with localized timezone
Feature: #595 add host attribute to VersionedItem.
Bugfix: #594 Enable sharding on chunkstore

1.67.1 (2018-07-11)

Bugfix: #579 Fix symbol corruption due to restore_version and append
Bugfix: #584 Fix list_versions for a snapshot after deleting symbols in later versions

1.67 (2018-05-24)

Bugfix: #561 Fix PickleStore read corruption after write_metadata

1.66 (2018-05-21)

Bugfix: #168 Do not allow empty string as a column name
Bugfix: #483 Remove potential floating point error from datetime_to_ms
Bugfix: #271 Log when library doesnt exist on delete
Feature: MetaDataStore: added list_symbols with regexp, as_of and metadata fields matching filters
Feature: Support for serialization of DataFrames in Pandas 0.23.x

1.65 (2018-04-16)

Bugfix: #534 VersionStore: overwriting a symbol with different dtype (but same data format) does not
raise exceptions anymore
Bugfix: #531 arctic_prune_versions: clean broken snapshot references before pruning
Bugfix: setup.py develop in a conda environment on Mac
Feature: #490 add support to numpy 1.14

1.63 (2018-04-06)

Bugfix: #521 Clang 6.0 compiler support on macOS
Feature: #510 VersionStore: support multi column in pandas DataFrames

1.62 (2018-3-14)

Bugfix: #517 VersionStore: append does not duplicate data in certain corner cases
Bugfix: #519 VersionStore: list_symbols speed improvement and fix for memory limit exceed

1.61 (2018-3-2)

Feature: #288 Mapping reads and writes over chunks in chunkstore
Bugfix: #508 VersionStore: list_symbols and read now always returns latest version
Bugfix: #512 Improved performance for list_versions
Bugfix: #515 VersionStore: _prune_previous_versions now retries the cleanup operation

1.60 (2018-2-13)

Bugfix: #503 ChunkStore: speedup check for -1 segments
Feature: #504 Increasing number of libraries in Arctic to 5000.

1.59 (2018-2-6)

Bugfix: Increase performance of invalid segment check in chunkstore
Bugfix: #501 Fix the spurious data integrity exceptions at write path, due to moving chunks form the balancer

1.58 (2018-1-15)

Bugfix: #491 roll back the use of frombuffer to fromstring, fixes the read-only ndarray issue

1.57 (2018-1-11)

Feature: #206 String support for tickstore
Bugfix: #486 improve mongo_retry robustness with failures for version store write/append

1.56 (2017-12-21)

Bugfix: #468 Re-adding compatibility for pandas 0.20.x
Bugfix: #476 Ensure we re-auth when a new MongoClient is created after fork

1.55 (2017-12-14)

Bugfix: #439 fix cursor timeouts in chunkstore iterator
Bugfix: #450 fix error in chunkstore delete when chunk range produces empty df
Bugfix: #442 fix incorrect segment values in multi segment chunks in chunkstore
Feature: #457 enchances fix for #442 via segment_id_repair tool
Bugfix: #385 exceptions during quota statistics no longer kill a write
Feature: PR#161 TickStore.max_date now returns a datetime in the 'local' timezone
Feature: #425 user defined metadata for tickstore
Feature: #464 performance improvement by avoiding unnecessary re-authentication
Bugfix: #250 Added multiprocessing safety, check for initialized MongoClient after fork.
Feature: #465 Added fast operations for write only metadata and restore symbol to a version

1.54 (2017-10-18)

Bugfix: #440 Fix read empty MultiIndex+tz Series

1.53 (2017-10-06)

Perf: #408 Improve memory performance of version store's serializer
Bugfix #394 Multi symbol read in chunkstore
Bugfix: #407 Fix segment issue on appends in chunkstore
Bugfix: Inconsistent returns on MetadataStore.append
Bugfix: #412 pandas deprecation and #289 improve exception report in numpy record serializer
Bugfix: #420 chunkstore ignoring open interval date ranges
Bugfix: #427 chunkstore metadata not being correctly replaced during symbol overwrite
Bugfix: #431 chunkstore iterators do not handle multi segment chunks correctly

1.51 (2017-08-21)

Bugfix: #397 Remove calls to deprecated methods in pymongo
Bugfix: #402 Append to empty DF fails in VersionStore

1.50 (2017-08-18)

Feature: #396 MetadataStore.read now supports as_of argument
Bugfix: #397 Pin pymongo==3.4.0

1.49 (2017-08-02)

Feature: #392 MetadataStore
Bugfix: #384 sentinels missing time data on chunk start/ends in ChunkStore
Bugfix: #382 Remove dependency on cython being pre-installed
Bugfix: #343 Renaming libraries/collections within a namespace/database

1.48 (2017-06-26)

BugFix: Rollback #363, as it breaks multi-index dataframe
Bugfix: #372 OSX build improvements

1.47 (2017-06-19)

Feature: Re-introduce #363 concat flag, essentially undo-ing 1.45
BugFix: #377 Fix broken replace_one on BSONStore and add bulk_write

1.46 (2017-06-13)

Feature: #374 Shard BSONStore on _id rather than symbol

1.45 (2017-06-09)

BugFix: Rollback #363, which can cause ordering issues on append

1.44 (2017-06-08)

Feature: #364 Expose compressHC from internal arctic LZ4 and remove external LZ4 dependency
Feature: #363 Appending older data (compare to what's exist in library) will raise. Use concat=True to append only the
new bits
Feature: #371 Expose more functionality in BSONStore

1.43 (2017-05-30)

Bugfix: #350 remove deprecated pandas calls
Bugfix: #360 version incorrect in empty append in VersionStore
Feature: #365 add generic BSON store

1.42 (2017-05-12)

Bugfix: #346 fixed daterange subsetting error on very large dateframes in version store
Bugfix: #351 $size queries can't use indexes, use alternative queries

1.41 (2017-04-20)

Bugfix: #334 Chunk range param with pandas object fails in chunkstore.get_chunk_ranges
Bugfix: #339 Depending on lz4<=0.8.2 to fix build errors
Bugfix: #342 fixed compilation errors on Mac OSX
Bugfix: #344 fixed data corruption problem with concurrent appends

1.40 (2017-03-03)

BugFix: #330 Make Arctic._lock reentrant

1.39 (2017-03-03)

Feature: #329 Add reset() method to Arctic

1.38 (2017-02-22)

Bugfix: #324 Datetime indexes must be sorted in chunkstore
Feature: #290 improve performance of tickstore column reads

1.37 (2017-1-31)

Bugfix: #300 to_datetime deprecated in pandas, use to_pydatetime instead
Bugfix: #309 formatting change for DateRange __str__
Feature: #313 set and read user specified metadata in chunkstore
Feature: #319 Audit log support in ChunkStor
Bugfix: #216 Tickstore write fails with named index column

1.36 (2016-12-13)

Feature: Default to hashed based sharding
Bugfix: retry socket errors during VersionStore snapshot operations

1.35 (2016-11-29)

Bugfix: #296 Cannot compress/decompress empty string

1.34 (2016-11-29)

Feature: #294 Move per-chunk metadata for chunkstore to a separate collection
Bugfix: #292 Account for metadata size during size chunking in ChunkStore
Feature: #283 Support for all pandas frequency strings in ChunkStore DateChunker
Feature: #286 Add has_symbol to ChunkStore and support for partial symbol matching in list_symbols

1.33 (2016-11-07)

Feature: #275 Tuple range object support in DateChunker
Bugfix: #273 Duplicate columns breaking serializer
Feature: #267 Tickstore.delete returns deleted data
Dependency: #266 Remove pytest-dbfixtures in favor of pytest-server-fixtures

1.32 (2016-10-25)

Feature: #260 quota support on Chunkstore
Bugfix: #259 prevent write of unnamed columns/indexes
Bugfix: #252 pandas 0.19.0 compatibility fixes
Bugfix: #249 open ended range reads on data without index fail
Bugfix: #262 VersionStore.append must check data is written correctly during repack
Bugfix: #263 Quota: Improve the error message when near soft-quota limit
Perf: #265 VersionStore.write / append don't aggressively add indexes on each write

1.31 (2016-09-29)

Bugfix: #247 segmentation read fix in chunkstore
Feature: #243 add get_library_type method
Bugfix: more cython changes to handle LZ4 errors properly
Feature: #239 improve chunkstore's get_info method

1.30 (2016-09-26)

Feature: #235 method to return chunk ranges on a symbol in ChunkStore
Feature: #234 Iterator access to ChunkStore
Bugfix: #236 Cython not handling errors from LZ4 function calls

1.29 (2016-09-20)

Bugfix: #228 Mongo fail-over during append can leave a Version in an inconsistent state
Feature: #193 Support for different Chunkers and Serializers by symbol in ChunkStore
Feature: #220 Raise exception if older version of arctic attempts to read unsupported pickled data
Feature: #219 and #220 Support for pickling large data (>2GB)
Feature: #204 Add support for library renaming
Feature: #209 Upsert capability in ChunkStore's update method
Feature: #207 Support DatetimeIndexes in DateRange chunker
Bugfix: #232 Don't raise during VersionStore #append(...) if the previous append failed

1.28 (2016-08-16)

Bugfix: #195 Top level tickstore write with list of dicts now works with timezone aware datetimes

1.27 (2016-08-05)

Bugfix: #187 Compatibility with latest version of pytest-dbfixtures
Feature: #182 Improve ChunkStore read/write performance
Feature: #162 Rename API for ChunkStore
Feature: #186 chunk_range on update
Bugfix: #189 range delete does not update symbol metadata

1.26 (2016-07-20)

Bugfix: Faster TickStore querying for multiple symbols simultaneously
Bugfix: TickStore.read now respects allow_secondary=True
Bugfix: #147 Add get_info method to ChunkStore
Bugfix: Periodically re-cache the library.quota to pick up any changes
Bugfix: #166 Add index on SHA for ChunkStore
Bugfix: #169 Dtype mismatch in chunkstore updates
Feature: #171 allow deleting of values within a date range in ChunkStore
Bugfix: #172 Fix date range bug when querying dates in the middle of chunks
Bugfix: #176 Fix overwrite failures in Chunkstore
Bugfix: #178 - Change how start/end dates are populated in the DB, also fix append so it works as expected.
Bugfix: #43 - Remove dependency on hardcoded Linux timezone files

1.25 (2016-05-23)

Bugfix: Ensure that Tickstore.write doesn't allow out of order messages
Bugfix: VersionStore.write now allows writing 'None' as a value

1.24 (2016-05-10)

Bugfix: Backwards compatibility reading/writing documents with previous versions of Arctic

1.22 (2016-05-09)

Bugfix: #109 Ensure stable sort during Arctic read
Feature: New benchmark suite using ASV
Bugfix: #129 Fixed an issue where some chunks could get skipped during a multiple-symbol TickStore read
Bugfix: #135 Fix issue with different datatype returned from pymongo in python3
Feature: #130 New Chunkstore storage type

1.21 (2016-03-08)

Bugfix: #106 Fix Pandas Panel storage for panels with different dimensions

1.20 (2016-02-03)

Feature: #98 Add initial_image as optional parameter on tickstore write()
Bugfix: #100 Write error on end field when writing with pandas dataframes

1.19 (2016-01-29)

Feature: Add python 3.3/3.4 support
Bugfix: #95 Fix raising NoDataFoundException across multiple low level libraries

1.18 (2016-01-05)

Bugfix: #81 Fix broken read of multi-index DataFrame written by old version of Arctic
Bugfix: #49 Fix strifying tickstore

1.17 (2015-12-24)

Feature: Add timezone suppport to store multi-index dataframes
Bugfix: Fixed broken sdist releases

1.16 (2015-12-15)

Feature: ArticTransaction now supports non-audited 'transactions': audit=False

with ArcticTransaction(Arctic('hostname')['some_library'], 'symbol', audit=False) as at:
...

This is useful for batch jobs which read-modify-write and don't want to clash with
concurrent writers, and which don't require keeping all versions of a symbol.

1.15 (2015-11-25)

Feature: get_info API added to version_store.

1.14 (2015-11-25)
1.12 (2015-11-12)

Bugfix: correct version detection for Pandas >= 0.18.
Bugfix: retrying connection initialisation in case of an AutoReconnect failure.

1.11 (2015-10-29)

Bugfix: Improve performance of saving multi-index Pandas DataFrames
by 9x
Bugfix: authenticate should propagate non-OperationFailure exceptions
(e.g. ConnectionFailure) as this might be indicative of socket failures
Bugfix: return 'deleted' state in VersionStore.list_versions() so that
callers can pick up on the head version being the delete-sentinel.

1.10 (2015-10-28)

Bugfix: VersionStore.read(date_range=...) could do the wrong thing with
TimeZones (which aren't yet supported for date_range slicing.).

1.9 (2015-10-06)

Bugfix: fix authentication race condition when sharing an Arctic
instance between multiple threads.

1.8 (2015-09-29)

Bugfix: compatibility with both 3.0 and pre-3.0 MongoDB for
querying current authentications

1.7 (2015-09-18)

Feature: Add support for reading a subset of a pandas DataFrame
in VersionStore.read by passing in an arctic.date.DateRange
Bugfix: Reauth against admin if not auth'd against a library a
specific library's DB. Sometimes we appear to miss admin DB auths.
This is to workaround that until we work out what the issue is.

1.6 (2015-09-16)

Feature: Add support for multi-index Bitemporal DataFrame storage.
This allows persisting data and changes within the DataFrame making it
easier to see how old data has been revised over time.
Bugfix: Ensure we call the error logging hook when exceptions occur

1.5 (2015-09-02)

Always use the primary cluster node for 'has_symbol()', it's safer

1.4 (2015-08-19)

Bugfixes for timezone handling, now ensures use of non-naive datetimes
Bugfix for tickstore read missing images

1.3 (2015-08-011)

Improvements to command-line control scripts for users and libraries
Bugfix for pickling top-level Arctic object

1.2 (2015-06-29)

Allow snapshotting a range of versions in the VersionStore, and
snapshot all versions by default.

1.1 (2015-06-16)

Bugfix for backwards-compatible unpickling of bson-encoded data
Added switch for enabling parallel lz4 compression

1.0 (2015-06-14)

Initial public release