Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python.announce > #2174

ANN: bcolz 1.1.0 released!

Path csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From Francesc Alted <faltet@gmail.com>
Newsgroups comp.lang.python.announce
Subject ANN: bcolz 1.1.0 released!
Date Fri, 10 Jun 2016 17:28:09 +0200
Lines 122
Approved python-announce-list@python.org
Message-ID <mailman.141.1465572563.2306.python-announce-list@python.org> (permalink)
References <CAFrp1vrPij1QtCyvkqTanjsh8knXGrcZun-yrtR5Pcmc3EcqQw@mail.gmail.com>
Reply-To faltet@gmail.com
Mime-Version 1.0
Content-Type text/plain; charset=UTF-8
X-Trace news.uni-berlin.de voq+DeIM5vO2jd5tXRm8bA3snWYbRdEbkX+3FOTXb/BQ==
Return-Path <faltet@gmail.com>
X-Original-To python-announce-list@python.org
Delivered-To python-announce-list@mail.python.org
X-Spam-Status OK 0.000
X-Spam-Evidence '*H*': 1.00; '*S*': 0.00; 'binary': 0.05; 'defaults': 0.05; 'repository': 0.05; '(so': 0.07; 'column': 0.07; 'expressions': 0.07; 'subject:ANN': 0.07; 'subject:released': 0.07; 'below).': 0.09; 'cc:addr:googlegroups.com': 0.09; 'compression': 0.09; 'fine-tune': 0.09; 'git': 0.09; 'internally': 0.09; 'moreover,': 0.09; 'rows': 0.09; 'url:github': 0.09; 'url:rst': 0.09; 'systems.': 0.11; 'url:)': 0.14; '(),': 0.16; '1.1.0': 0.16; '255': 0.16; '==========': 0.16; 'alted': 0.16; 'columns': 0.16; 'containers': 0.16; 'efficiently.': 0.16; 'evaluating': 0.16; 'francesc': 0.16; 'from:addr:faltet': 0.16; 'from:name:francesc alted': 0.16; 'iterators': 0.16; 'now.\xc2\xa0': 0.16; 'numpy': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'too).': 0.16; 'url:licenses': 0.16; 'url:talks': 0.16; 'app': 0.16; 'memory': 0.17; 'cheap': 0.18; 'windows': 0.20; 'cc:addr:python.org': 0.20; '(see': 0.20; 'machine': 0.21; 'cc:2**1': 0.22; '64-bit': 0.22; 'arrays': 0.22; 'see:': 0.22; 'skip:= 20': 0.22; "user's": 0.22; 'cc:no real name:2**0': 0.22; '(like': 0.23; 'performing': 0.23; 'specially': 0.23; 'tables': 0.23; 'unix': 0.24; 'example': 0.26; 'addition,': 0.27; '----': 0.27; 'least': 0.27; 'message-id:@mail.gmail.com': 0.27; '(although': 0.29; '32-bit': 0.29; 'closer': 0.29; 'comparison': 0.29; 'fast.': 0.29; 'gil': 0.29; 'i/o': 0.29; 'objects': 0.29; 'tutorial': 0.29; 'typically': 0.29; 'allows': 0.30; 'minimal': 0.30; 'query': 0.30; 'operations': 0.31; 'at:': 0.31; 'another': 0.32; 'implement': 0.32; 'getting': 0.33; 'point': 0.33; 'platforms.': 0.33; 'received:google.com': 0.35; 'filter': 0.35; 'i.e.': 0.35; 'list:': 0.35; 'quite': 0.35; 'supports': 0.35; 'url:org': 0.36; 'received:209.85': 0.36; 'possible': 0.36; 'data.': 0.36; 'faster': 0.36; 'framework': 0.36; 'notes': 0.36; 'subject:: ': 0.37; 'method': 0.37; 'operating': 0.37; 'thanks': 0.37; 'release': 0.37; 'doing': 0.38; 'creation': 0.38; 'virtual': 0.38; 'received:209': 0.38; 'several': 0.38; 'test': 0.39; 'data': 0.39; 'format': 0.39; 'does': 0.39; 'resources': 0.39; 'called': 0.40; 'some': 0.40; 'ever': 0.60; 'url:group': 0.61; 'default': 0.61; 'real': 0.62; 'improved': 0.63; 'more': 0.63; 'visit': 0.64; 'between': 0.65; 'license': 0.65; 'fundamental': 0.66; 'promise': 0.66; 'header :Reply-To:1': 0.67; 'home': 0.67; 'finally': 0.70; 'reply-to:no real name:2**0': 0.71; 'special': 0.73; 'reply-to:addr:gmail.com': 0.76; 'carried': 0.76; 'removal': 0.79; 'column.': 0.84; 'dimensional': 0.84; 'faster.': 0.84; 'highlights:': 0.84; 'lastly,': 0.84; 'together,': 0.84; 'url:master': 0.84; 'announcing': 0.91; 'chapters': 0.93; 'engines.': 0.93; 'reducing': 0.93; 'email addr:googlegroups.com': 0.95
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:reply-to:from:date:message-id:subject:to:cc; bh=cylg805EswTx6yedEu2fTfshqZIZJ1uidrqG7An3NY0=; b=TZ2V5j6yq0LOdADNUdo+4u+Y00qW6/yu/hfTyLVCeHxgMgvtZOWtkF2acO4xnQFuDP kJ5JsMTAnsR7ZXYobwSGp48OIPtASbGpUsgKoZuUfjhVNKmOD4OKL4S4o6eq5Hrflbds prAiXH2H26Ud+gycrAx1FUGQbRC9J3t4XLZwVS9/O+n9OIyI0KKiWXwt+8m7Fi1NCyd4 D+mi+7RLvkKda1dwtmlDHT2b+Bei9V51v6MyX1yNe7B0aTQBZ+1o9G5esgj2LXxfgpCU xmc2aZgy4+GIL5pWT0lkKuQuV2n3yUCJTH1l5+rOvyG81Vgr7TSeZRmNEf8siXZ/tTeR zoSw==
X-Google-DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:reply-to:from:date:message-id :subject:to:cc; bh=cylg805EswTx6yedEu2fTfshqZIZJ1uidrqG7An3NY0=; b=jheVztEQ18I/zRFM09Qdm6Gst2ppaX4xIPE9kVJUzSoiDXM6PQgF/4mb9OhE1jwNkp IVMTssqDharjxzGM/UxoyOYywZ2exyph9dKgoAO5eBlHukzld1t/VaqATYy5EwiG6lZy DiCEVPJqe9bTRwuukcqDIVDZHyaaShqkxGb1ifQ+rsOKz4uLUL8Z2L+sPjx2QzOgKbhB ZaVg9Tuxo8DrAJz9rkGXuiDZpaKhuqS+wpBDArxG38REVRxnrZlPjMKnkvi7X+cQfFiL O+Ii2ruDp714bwDgWJhaNxPKuPwerarGOTBd1fS3ypBO3aI0MxX3HocJ6br9mFXWK3qo 7N0w==
X-Gm-Message-State ALyK8tJu+XjIgcgKfFICy4ZEz/5OrtjB16/14CoK0qEDle6IGP3z4dLU81XzSRolRWUaMevdEZNuRB2sLIUMaQ==
X-Received by 10.13.227.69 with SMTP id m66mr1384641ywe.302.1465572490017; Fri, 10 Jun 2016 08:28:10 -0700 (PDT)
X-Mailman-Approved-At Fri, 10 Jun 2016 11:29:21 -0400
X-Content-Filtered-By Mailman/MimeDel 2.1.22
X-BeenThere python-announce-list@python.org
X-Mailman-Version 2.1.22
Precedence list
List-Id Announcement-only list for the Python programming language <python-announce-list.python.org>
List-Unsubscribe <https://mail.python.org/mailman/options/python-announce-list>, <mailto:python-announce-list-request@python.org?subject=unsubscribe>
List-Archive <http://mail.python.org/pipermail/python-announce-list/>
List-Post <mailto:python-announce-list@python.org>
List-Help <mailto:python-announce-list-request@python.org?subject=help>
List-Subscribe <https://mail.python.org/mailman/listinfo/python-announce-list>, <mailto:python-announce-list-request@python.org?subject=subscribe>
X-Mailman-Original-Message-ID <CAFrp1vrPij1QtCyvkqTanjsh8knXGrcZun-yrtR5Pcmc3EcqQw@mail.gmail.com>
Xref csiph.com comp.lang.python.announce:2174

Show key headers only | View raw

======================
Announcing bcolz 1.1.0
======================

What's new
==========

This release brings quite a lot of changes.  After format stabilization
in 1.0, the focus is now in fine-tune many operations (specially queries
in ctables), as well as widening the available computational engines.

Highlights:

* Much improved performance of ctable.where() and ctable.whereblocks().
  Now bcolz is getting closer than ever to fundamental memory limits
  during queries (see the updated benchmarks in the data containers
  tutorial below).

* Better support for Dask; i.e. GIL is released during Blosc operation
  when bcolz is called from a multithreaded app (like Dask).  Also, Dask
  can be used as another virtual machine for evaluating expressions (so
  now it is possible to use it during queries too).

* New ctable.fetchwhere() method for getting the rows fulfilling some
  condition in one go.

* New quantize filter for allowing lossy compression of floating point
  data.

* It is possible to create ctables with more than 255 columns now.
  Thanks to Skipper Seabold.

* The defaults during carray creation are scalars now.  That allows to
  create highly dimensional data containers more efficiently.

* carray object does implement the __array__() special method now. With
  this, interoperability with numpy arrays is easier and faster.

For a more detailed change log, see:

https://github.com/Blosc/bcolz/blob/master/RELEASE_NOTES.rst

For some comparison between bcolz and other compressed data containers,
see:

https://github.com/FrancescAlted/DataContainersTutorials

specially chapters 3 (in-memory containers) and 4 (on-disk containers).


What it is
==========

*bcolz* provides columnar and compressed data containers that can live
either on-disk or in-memory.  Column storage allows for efficiently
querying tables with a large number of columns.  It also allows for
cheap addition and removal of column.  In addition, bcolz objects are
compressed by default for reducing memory/disk I/O needs. The
compression process is carried out internally by Blosc, an
extremely fast meta-compressor that is optimized for binary data. Lastly,
high-performance iterators (like ``iter()``, ``where()``) for querying
the objects are provided.

bcolz can use numexpr internally so as to accelerate many vector and
query operations (although it can use pure NumPy for doing so too).
numexpr optimizes the memory usage and use several cores for doing the
computations, so it is blazing fast.  Moreover, since the carray/ctable
containers can be disk-based, and it is possible to use them for
seamlessly performing out-of-memory computations.

bcolz has minimal dependencies (NumPy), comes with an exhaustive test
suite and fully supports both 32-bit and 64-bit platforms.  Also, it is
typically tested on both UNIX and Windows operating systems.

Together, bcolz and the Blosc compressor, are finally fulfilling the
promise of accelerating memory I/O, at least for some real scenarios:

http://nbviewer.ipython.org/github/Blosc/movielens-bench/blob/master/querying-ep14.ipynb#Plots

Example users of bcolz are Visualfabriq (http://www.visualfabriq.com/),
and Quantopian (https://www.quantopian.com/):

* Visualfabriq:

  * *bquery*, A query and aggregation framework for Bcolz:
  * https://github.com/visualfabriq/bquery

* Quantopian:

  * Using compressed data containers for faster backtesting at scale:
  * https://quantopian.github.io/talks/NeedForSpeed/slides.html



Resources
=========

Visit the main bcolz site repository at:
http://github.com/Blosc/bcolz

Manual:
http://bcolz.blosc.org

Home of Blosc compressor:
http://blosc.org

User's mail list:
bcolz@googlegroups.com
http://groups.google.com/group/bcolz

License is the new BSD:
https://github.com/Blosc/bcolz/blob/master/LICENSES/BCOLZ.txt

Release notes can be found in the Git repository:
https://github.com/Blosc/bcolz/blob/master/RELEASE_NOTES.rst

----

  **Enjoy data!**

-- 
Francesc Alted

Back to comp.lang.python.announce | Previous | Next | Find similar | Unroll thread

Thread

ANN: bcolz 1.1.0 released! Francesc Alted <faltet@gmail.com> - 2016-06-10 17:28 +0200

csiph-web