BEST_SPEED,是ES索引默认的压缩算法,使用了LZ4压缩。压缩与解压速度快,CPU占用低,但压缩效果弱。 BEST_COMPRESSION,使用了ZIP压缩。压缩与解压速度慢,CPU占用高,但压缩效果好。 Lucene的压缩算法仅针对占比最大的行存文件生效,其他文件通过自定义编码优化来降低存储。目前滴滴ES日志集群采用BEST_COMPRESSION压缩算法,...
Output compressed dataCompression errorOutput decompressed dataDecompression errorCompressCompressedErrorDecompressDecompressed 压缩效率与旅行图 通过不同级别的压缩效果展示Zstd的效率,这里用Mermaid语法表示可能的压缩级别: Compression level 1Compression level 10Compression level 20Decompression speed is high 压缩程度 高...
5 ways Facebook improved compression at scale with Zstandard 应用
I measured zstd's compression speed on a weak VM (zstd v1.4.8) that has only 4 cores and 8GB RAM and repeated the experiment on a more powerful machine (zstd v1.5.5), which is a few years old but has 128GB of RAM and 64 cores. My expectation was that the latter should be fast...
perf: substantial compression speed improvements (up to +30%) on small data, by @TocarIP (#4144) and @Cyan4973 (#4165) perf: improved compression speed (~+5%) for dictionary compression at low levels (#4170) perf: much faster --patch-from at high compression levels (#4276) perf: high...
Compression Speed vs RatioDecompression Speed A few other algorithms can produce higher compression ratios at slower speeds, falling outside of the graph. For a larger picture including slow modes,click on this link. The case for Small Data compression ...
Faster Compression Speed when Re-Using Contexts In server workloads (characterized by very high compression volume of relatively small inputs), the allocation and initialization ofzstd's internal datastructures can become a significant part of the cost of compression. For this reason,zstdhas long had...
Higher numbers of bits increases the chance to find a match which usually improves compression ratio. It also slows down compression speed and increases memory requirements for compression. This option is ignored for the ZSTD_fast strategy.
zstd is a fast lossless compression algorithm and data compression tool, with command line syntax similar to gzip(1) and xz(1).
Support for Facebook's zstd compression algorithm was implemented in the dpkg and apt command-line package management systems forDebianGNU/Linux and Ubuntu operating systems. Also, Canonical now plans to enable it by default in future Ubuntu releases, starting with Ubuntu 18.10 ...