Zstandard - Real-time data compression algorithm
Zstandard is a fast compression algorithm, providing high compression ratios. It also offers a special mode for small data, called dictionary compression. The reference library offers a very wide range of speed / compression trade-off, and is backed by an extremely fast decoder (see benchmarks below). Zstandard library is provided as open source software using a BSD license. Its format is stable a
Firefox's Optimized Zip Format: Reading Zip Files Really Quickly
Firefox's Optimized Zip Format: Reading Zip Files Really Quickly This post is about minimizing amount of disk IO and CPU overhead when reading Zip files. I recently saw an article about a new format that was faster than zip. This is quite surprising as to my mind, zip is one of the most flexible and low-overhead formats I’ve encountered. Some googling showed me that over past 11 years people have
Zstandard - Real-time data compression algorithm
Zstandard is a fast compression algorithm, providing high compression ratios. It also offers a special mode for small data, called dictionary compression. The reference library offers a very wide range of speed / compression trade-off, and is backed by an extremely fast decoder (see benchmarks below). Zstandard library is provided as open source software using a BSD license. Its format is stable a
"チープ"にビッグデータを扱うのならMessagePack＋LZ4がいい感じ【データベースと対決】 - Qiita
皆さんはビッグデータを扱うときどのような形式で保存していますか？ここでいうビッグデータとは数GB～数十GB（笑）のJSONです。MongoDBのようなNoSQLなデータベース使う？素晴らしいと思います。PostgreSQLでJSONを使う？とても良いと思います。 ここでは、データベースという枠組みから外れて、「ファイルシステム」を中心に手軽にお安く（ここポイント）ビッグデータを扱うことを考えます。なので、この方法は最速ではありませんし、個人がちょっと遊んでみようというときに気楽にできる”チープ”な物です1。企業でやるならちゃんとしたデータベースを使うべきです。その前提で読んでみてください（ちょっと長いです）。 ファイルシステムは、テキストファイルやZipアーカイブといったただのファイルです。ただのファイルなので、データベースが得意なインデックスも効きませんし、検索や結合も弱いですし、同時接
How Uber Engineering Evaluated JSON Encoding and Compression Algorithms to Put the Squeeze on Trip Data
For compression, we put three lossless and widely accepted libraries to the test: Snappy zlib Bzip2 (BZ2) Snappy aims to provide high speeds and reasonable compression. BZ2 trades speed for better compression, and zlib falls somewhere between them. Testing Our goal was to find the combination of encoding protocol and compression algorithm with the most compact result at the highest speed. We teste
GZinga: Seekable and Splittable Gzip
Generally, data compression techniques are used to conserve space and network bandwidth. Widely used compression techniques include Gzip, bzip2, lzop, and 7-Zip. According to performance benchmarks, lzop is one of the fastest compression algorithms, while bzip2 has a high compression ratio but is very slow. Gzip offers the lowest level of compression. Gzip is based on the DEFLATE algorithm, which
モデル圧縮 - nico-opendata
nico-opendata niconicoでは、学術分野における技術発展への寄与を目的として、 研究者の方を対象に各種サービスのデータを公開しています。 ニコニコ動画コメント等データセット (株)ドワンゴ及び(有)未来検索ブラジルと国立情報学研究所が協力して研究者に提供しているデータセットです。 ニコニコ動画コメント等のデータが利用可能です。 利用申請フォーム※国立情報学研究所へリンクします ニコニコ大百科データ (株)ドワンゴ及び(有)未来検索ブラジルと国立情報学研究所が協力して研究者に提供しているデータセットです。 ニコニコ大百科のデータが利用可能です。 利用申請フォーム※国立情報学研究所へリンクします Nico-Illustデータセット Comicolorization: Semi-Automatic Manga Colorization Chie Furusawa*、Kazuyu
Introducing Brotli: a new compression algorithm for the internet
The latest news from Google on open source releases, major projects, events, and student outreach programs. At Google, we think that internet users’ time is valuable, and that they shouldn’t have to wait long for a web page to load. Because fast is better than slow, two years ago we published the Zopfli compression algorithm. This received such positive feedback in the industry that it has been in
XZ Utils
XZ Utils is a complete C99 implementation of the .xz file format. XZ Utils were originally written for POSIX systems, but has been ported to a few non-POSIX systems over the years. XZ Utils consist of several components: liblzma is a compression library with an API similar to that of zlib. xz is a command line tool with syntax similar to that of gzip. xzdec is a decompression-only tool smaller tha
MySQLの新しいInnoDB ページI/O圧縮機能について解析してみた
InnoDBにはデータの圧縮機能がありますが、パフォーマンスが低いことからあまり使われていません。ただ今年の Percona Live で Oracle MySQL, MariaDB, そして Percona Server が新しい InnoDB Compression を出してきました。これはFusion-ioの R&D チームがフラッシュストレージ向けの MySQL 高速化の一環で開発したパッチが元になっています。ちなみに私は Fusion-io の社員ですのでこの発表をワクテカして待っていたのですが、折角コードが一般にリリースされたので、ソースコードを眺めて動作を調べることにしました。 参考にしたのは MySQL Server Snapshots (labs.mysql.com) にあるMySQL with InnoDB PageIO Compression のソースコード、およびM
Best splittable compression for Hadoop input = bz2?
We've realized a bit too late that archiving our files in GZip format for Hadoop processing isn't such a great idea. GZip isn't splittable, and for reference, here are the problems which I won't repeat: Very basic question about Hadoop and compressed input files Hadoop gzip compressed files Hadoop gzip input file using only one mapper Why can't hadoop split up a large text file and then compress t
Cloudera Blog
Riding the wave of the generative AI revolution, third party large language model (LLM) services like ChatGPT and Bard have swiftly emerged as the talk of the town, converting AI skeptics to evangelists and transforming the way we interact with technology. For proof of this megatrend look no further than the instant success of ChatGPT, […] Read blog post
HDFS and Hive storage - comparing file formats and compression methods
Email addressNever miss our publications about Open Source, big data and distributed systems, low frequency of one email every two months. A few days ago, we have conducted a test in order to compare various Hive file formats and compression methods. Among those file formats, some are native to HDFS and apply to all Hadoop users. The test suite is composed of similar Hive queries which create a ta
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A Comprehensive Survey of Compression Algorithms for Language Models
Read the contents of a zipped file without extraction?
Zarr-Python — zarr 2.16.1 documentation
GitHub - smihica/pyminizip: To create a password encrypted zip file in python.
lzop vs compress vs gzip vs bzip2 vs lzma vs lzma2/xz benchmark, reloaded
Parallel xz compression
Hadoop splittable-lzo-compression
