Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 5; Note: For RHEL7 and RHEL8, refer to How to extract the contents of initramfs image on RHEL7? Issue. Compression method depends on the vendor/person who delivers and it could be gzip, lzma etc. LZMA is one of the best compression algorithms and Squashfs is one of the best compressed filesystems available nowadays. While the latest Fedora comes with GNU tar 1. bzip2/lzma: x86 kernel compression support bzip2/lzma: fix built-in initramfs vs CONFIG_RD_GZIP bzip2/lzma: fix decompress_inflate. Our goal is to help you understand what a file with a *. This is meant for advanced users only. lzma files | linux commands examples - Thousands of examples to help you to the Force of the Command Line. 04LTS) (utils): Compression and decompression in the LZMA format - command line utility. lzma is a LZMA compressed file. LZMA compression within ZIP archive allows ZIP container to contain LZMA compressed entries. xz format (which is already widely preferred over. But, will be very fast. Gnu Tar archives can contain multiple files and directories, file permissions can be preserved and it supports multiple compression formats. Hi all, I am working on a OS which is in the livecd fomat(its also installable). make your squashfs filesystems smaller using lzma compression algorithm. 7-Zip is a file archiver with the highest compression ratio. The primary design goal of cromfs is compression power. The last LZMA-Utils release was 2008-07-30, and discontinued. Give it a try, compression ratio is a bit better than RAR, and decompression is faster. LZMa is a type of file compression similar to RAR or ZIP, and it stands for Lempel-Ziv-Markov chain-Algorithm. - lzma: added the ability to modify the compression properties for buffers and lzma alone files. Related: LZIP is better than 7-zip. 3 supports LZMA compression, though you'll need an LZMA implementation installed in order to use it. If you have a multiprocessor or multicore system, you can get a increase with this switch. Use lzma or 7z. Supported formats: Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR; Free 7-Zip Software Linux. The stub decompresses the kernel code, on some systems printing dots to the console to indicate progress. Its main goal is to use all system resources to speed up compression time with minimal possible influence on compression ratio. You may rarely (as a Windows user) come across a file with the LZMA extension and wonder what it is. This is meant for advanced users only. There is an implementation called Parzip that supports parallel LZMA compression out of the box. Compressing files under Linux or UNIX cheat sheet. Parallel XZ (PXZ) is a compression utility that takes advantage of running LZMA compression of different parts of an input file on multiple cores and processors simultaneously. 15 Bytes/cycle). zstd is a fast lossless compression algorithm and data compression tool, with command line syntax similar to gzip (1) and xz (1). Zipping a file is an example of compression. but it will KP if the compression parameter is other than default, for example if i try lzma -e -9 -z for initramfs image it will leads to KP. Multi-threaded lzo, gzip, bzip2, lzma/xz compression: if you have a dual-core / quad-core it will use all the power of your cpu; Lzma/xz compression (slow but very efficient algorithm) to make your archive smaller. img is a compressed cpio archive. Is there some explanation somewhere of LZMA's "multiple file" advantage? At face value it seems to me that in most cases on Linux the compression would be done on a single tar file. Zstd compression is used elsewhere in the Linux kernel but support for compressing the kernel image with Zstandard hasn't materialized in the tree. Compression method depends on the vendor/person who delivers and it could be gzip, lzma etc. 04LTS) (utils): Compression and decompression in the LZMA format - command line utility. This project combined both to make something even better. lzma is tarball file compressed with LZMA (Lempel-Ziv-Markov chain Algorithm) compression, and thus uses the compound file extension ". 7-Zip is a file archiver with the highest compression ratio. The libarchive library features: Support for a variety of archive and compression formats. So to view the contents of initrd. if you really want best compression, don't use gzip. Compression rate in 7zip format is better than in ZIP format. Since Deflate does not contain implementations restricted by patents, it has become very popular and is widely used, especially in Linux. Though classic LZMA compression has been improving for over a decade, there are still some options to explore. xz and legacy. xz format, but the legacy. Linux Journal shuts down, because cheapskate Linux users don't spend money. Most common compression method used by ZIP files is DEFLATE which is a combination of LZ77 algorithm and Huffman coding. 7zip for PC is actually an open-source program that is under GNU LGPL license, made for Microsoft Windows. But as first thing an overview of these 4 methods/programs of compression. With the old Slax releases, I had to patch kernel and squashfs to support LZMA compression. 38 or higher. Many of the archiving formats are now synonymous with the compression algorithm they use. The kind of backups I make is mostly files from ~/. The lrzip modifications make it scale according to memory size. 30 , new compression options have been recently added to the kernel. MariaDB with LZ4 Compression Howto for CentOS I really really wanted to run the latest MariaDB with LZ4 Page Compression. Compression rate in 7zip format is better than in ZIP format. Each LZMA encoder instance in multithreading mode divides the task of compression into 3 different tasks, where each task is executed in separated thread. To compress files you can use gzip, bzip2 and zip commands. There is an implementation called Parzip that supports parallel LZMA compression out of the box. It is much slower than its peers, and uses more RAM. It supports a wide variety of compression programs, namely: gzip, bzip2, lzip, lzma, lzop, zstd, xz and traditional compress. 7zip is popular tool and compression format. Currently it works on Windows, Mac, Linux and Android; moreover B1 Online Archiver allows you to uncompress. 878 compression ratio, we have the following options in order of fastest compression to slowest: plzip level 4, pxz level 4 and zstd level 18 and zstd --format=xz level 4; For pure compression speed, we have pigz level 1 to 4 or zstd level -4 to 2 which are all above 200MB/s compression speed. The stub decompresses the kernel code, on some systems printing dots to the console to indicate progress. b1, zip, rar or. 30, using LZMA or bzip2, which requires a very small decompression stub to be included in the resulting image. The native file format is the. 5 x86-64: lzo vs lz4 vs gzip vs bzip2 vs lzma File compression is an old trick:. LZMA can compress much better then gzip, which was the only option in squashfs for years. LZMA Utils are legacy data compression software with high compression ratio. The version available for Linux is known as p7zip package. lzma file formats used by the xz utility, as well as raw compressed streams. xz is used now for distributing patched in many Linux flavors. The Preset parameter controls the compression level. LZMA / LZMA2 are default and general compression methods of 7z format in the 7-Zip program. And also how to do this without using third-party software in Microsoft Windows 7, 8 and 10, Linux Mint, and Ubuntu. lzma tar ball from the Internet but I am not able to open tar ball. Hello Slackware switched to using LZMA to compress packages in order to solve space issues on the CDs. A high compression derivative, called LZ4_HC, is available, trading customizable CPU time for compression ratio. 7zip supports wide range of platforms and operations systems like Windows , Linux , BSD, MacOS etc. 5()(64bit) linux packages for ALTLinux, CentOS, Fedora, Mageia, OpenMandriva, openSUSE, PCLinuxOS, ROSA. Download lzma linux packages for CentOS, Debian, Fedora, FreeBSD, Mageia, NetBSD, OpenMandriva, openSUSE, PCLinuxOS, ROSA, Ubuntu. Sets multithread mode. I will consider zip, gzip, bzip2 and xv, i will not test compress another compression program present on Linux systems but now dated and surpassed by the other programs. 7-Zip is a free open source, cross-platform, powerful, and fully-featured file archiver with a high compression ratio, for Windows. 7s 4m37s 32. Never had a single problem with permissions since I solved that quite easily by simply opening fstab and adding. To compress a folder, you should use tar + gzip, which is tar -z. Learn more about 7zip (File Archive) Command Examples in Linux. The SDK history file states that it was in development from 1996, and first used in 7-Zip 2001-08-30. In the process, he's also aiming to drop LZMA1 and BZIP2 compression support for kernel images. lzma format used by LZMA Utils and raw compressed streams with no container format headers are also supported. That's why the resulting file is a. lzma or alone: Compress to the legacy. The good news is that xz kernel compression support should be available in Linux 3. lzma file format, or accept only. The SDK history file states that it was in development from 1996, and first used in 7-Zip 2001-08-30. Linux compressors comparison on CentOS 6. It is easy to see why tar + xz is so popular. 30, using LZMA or bzip2, which requires a very small decompression stub to be included in the resulting image. That's why the resulting file is a. This simple online text compression tool is compressing a plain text and decompressing compressed base64 string with gzip, bzip2 and deflate algorithms. LZMA is one of the best compression algorithms and Squashfs is one of the best compressed filesystems available nowadays. To extract data # lzma -d --stdout examplefile. It deploys LZMA as its default compression method which has the compression speed of about 1MB/s on 2GHz CPU. lzma files when decompressing. xz file compression. Encryption. Syntax We will use following syntax for 7z command. Discover every day !. Unfortunately you cannot use 7zip for streams like gzip or bzip2. That's why the resulting file is a. @ebux Also: although the. Need access to an account? If your company has an existing Red Hat account, your organization administrator can grant you access. lzma files The uncompressed size of the file can be stored in the. Search: Download. Resources Projects. There has been some rumor regarding non-existent LZMA patches for squashfs and Linux kernel nowadays. The GNU tar command included with Linux distributions has integrated compression. lzma files are un-openable, the linux kernel is clearly visible in plain text. Modern versions of tar, for example on Ubuntu 13. The name tar stands for "Tape Archiver", the format is an official POSIX standard. Compression ratio. xz To give a quick idea how these compression utilities compare, consider the effect of compressing patch-3. Lzma is a compression tool like bzip2 and gzip to compress and decompress files. pts/compress-lzma-1. lzma suffix is and how to open it. 22, which has a built-in flag for lzma compression, CentOS still uses GNU tar 1. It is therefore common to compress a file that is itself an archive, such as those created by the tar or cpio Unix programs. It has better compression ratios compared to bzip2 (. squashfs - a compressed fs for Linux Discussion Brought to you by: plougher , rlougher. The data is then either: Compressed by LZMA (default), which gives excellent compression at approximately twice the speed of bzip2 compression. It features an extremely fast decoder, with speed in multiple GB/s per core (~1 Byte/cycle). @ebux Also: although the. It has been under development since either 1996 or 1998 by Igor Pavlov and was first used in the 7z format of the 7-Zip archiver. LZMA is an improved version of famous LZ77 compression algorithm. -lzma filter the archive through lzma -lzop -no-auto-compress do not use archive suffix to determine the compression program-z, -gzip, -gunzip, -ungzip filter the archive through gzip-Z, -compress, -uncompress filter the archive through compress. So even if you use xz compression you can still decompress as usual: tar xvf file. Binwalk uses the libmagic library, so it is compatible with magic signatures created for the Unix file utility. lzma files when decompressing. lzma;" often used for distributing linux software packages. It is therefore common to compress a file that is itself an archive, such as those created by the tar or cpio Unix programs. Its main goal is to use all system resources to speed up compression time with minimal possible influence on compression ratio. If you are a new customer, register now for access to product evaluations and purchasing capabilities. The compression level can be indicated either using the level parameter, or by using both the dictionary-size and match-len-limit parameters. I know it is possible because I've uncompressed a. You can mix LZMA and LZO in a repository. xz and 7za compression programs. Never had a single problem with permissions since I solved that quite easily by simply opening fstab and adding. There are many formats available. XZ Utils (previously LZMA Utils) is a set of free command-line lossless data compressors, including LZMA and xz, for Unix-like operating systems and, from version 5. Zstd compression is used elsewhere in the Linux kernel but support for compressing the kernel image with Zstandard hasn't materialized in the tree. xenial (16. LZMA The Lempel-Ziv-Markov chain algorithm (LZMA) is an algorithm used to perform lossless data compression. Encryption. 7zip is distributed under LGPL license as a free software to use. Is there some explanation somewhere of LZMA's "multiple file" advantage? At face value it seems to me that in most cases on Linux the compression would be done on a single tar file. This tutorial will show you step by step how to compress (zip) files and folders into ZIP, RAR, 7Z or other compressed files in few different ways - using free software and online services (websites). I have a lzma compressed initrd which is copied into sdram. Tip: Both GNU and BSD tar automatically do decompression delegation for bzip2, compress, gzip, lzip, lzma and xz compressed archives. A Quick Benchmark: Gzip vs. Tarlz - Archiver with multimember lzip compression. Simultaneously, it also provides relatively fast decompression and is thus eligible for on-the-fly decompression which is necessary if the data needs to be accessed. c vs multi-block-with-embedded-filename H. It was improved in way of maximum increasing of compression ratio, keeping high decompression speed and low memory requirements for decompressing. xz format, but the legacy. This file compression utility implements the LZMA compression. To find out which perform best, I benchmarked 87 combinations of tools and levels. The primary design goal of cromfs is compression power. lzma tar ball from the Internet but I am not able to open tar ball. Download perl-Compress-Raw-Lzma-2. In this article, let us. lzma format. ZIP file format supports password based symmetric encryption. bzip2/lzma: x86 kernel compression support bzip2/lzma: fix built-in initramfs vs CONFIG_RD_GZIP bzip2/lzma: fix decompress_inflate. You may rarely (as a Windows user) come across a file with the LZMA extension and wonder what it is. It aims to be cross-platform and to provide an easy-to-use interface. BorgBackup - Deduplicating archiver with compression and authenticated encryption Deduplicating archiver with compression and encryption BorgBackup (short: Borg) gives you: Space efficient storage of backups. 3 supports LZMA compression, though you'll need an LZMA implementation installed in order to use it. LZMA is mostly used for the Linux operating systems. 1 [04 Dec 2018 12:14:42 EST] - Mark as deprecated as much better alternatives like Zstd, XZ, 7-zip, and even Gzip for relevancy compress-* tests available. Support for splitting large archives into several files with a fixed maximum size; Encryption of the archive using a password. non-streamed. To configure the lzma_stream for compression, you will use the lzma_easy_encode function. Download perl-Compress-Raw-Lzma-2. 7-zip is among the most popular archiving utilities because of its high compression ratio in 7z format with LZMA and LZMA2 compression's, plugin for FAR manager, integration with Windows Shell, AES-256 encryption in 7z and ZIP formats, among other features. Dear all, I have been reading the following link, that is about lzma performance compred to bzip2. 1; So you will have to pipe your tarball manually to the lzma binary. 3, the lzma module provides support for. The file is used by 7-Zip among other file archivers. 7-Zip supports multithread mode only for LZMA / LZMA2 compression and BZip2 compression / decompression. The primary design goal of cromfs is compression power. LZMA provides very high compression ratio and fast decompression. use 7z / LZMA / LZMA2 / XZ compression. 0 from OpenMandriva Unsupported Release repository. lzma file under Linux or UNIX like operating systems using command line options? LZMA (Lempel-Ziv-Markov chain-Algorithm) is an improved version of famous LZ77 compression algorithm. lzma) files. Remember that compressing an already compressed file adds extra overhead, hence, you will receive a slightly bigger file. LZMa is a type of file compression similar to RAR or ZIP, and it stands for Lempel-Ziv-Markov chain-Algorithm. compress (string [, level]) ¶ Compresses the data in string, returning a string contained compressed data. p7zip is a port of 7za. Impressed by the spectacular compression ratios of the Inno Setup compiler, I wanted to use the great compression algorithm LZMA in my own Python programs. I will consider zip, gzip, bzip2 and xv, i will not test compress another compression program present on Linux systems but now dated and surpassed by the other programs. It is fast, and despite its age it gives still very good results in compressing text files like source code. 6613 for Windows. I understand that Compression Algorithms check for redundant Data in Files and then compress them to save space on the Disk, but man, using Ark to compress my Virtual Machines from VirtualBox is so painfully SLOW!! :( I think I'll go back to playing Need For Speed, while compressing my. While both of them uses the same compression algorithm by default, xz is considered more up-to-date and feature rich, with lzma being somewhat legacy tool. Never had a single problem with permissions since I solved that quite easily by simply opening fstab and adding. Their files became smaller, and more data could be crammed onto disc platters than ever before. LZMA Utils are legacy data compression software with high compression ratio. 4 GHz dual-core ARMv8-A. it is a game changer for many types of large databases I deal with. Since Deflate does not contain implementations restricted by patents, it has become very popular and is widely used, especially in Linux. XZ Utils (previously LZMA Utils) is a set of free command-line lossless data compressors, including LZMA and xz, for Unix-like operating systems and, from version 5. To expand compressed file (decompresses) you can use and gzip -d, bunzip2 (bzip2 -d), unzip commands. It is an open-source algorithm characterized by its higher compression ratio. Binwalk uses the libmagic library, so it is compatible with magic signatures created for the Unix file utility. In this tutorial, we will show you the various Linux's archiving and compression commands and the proper way to make use of them. 7z archive from your computer directly online. I will consider zip, gzip, bzip2 and xv, i will not test compress another compression program present on Linux systems but now dated and surpassed by the other programs. But, will be very fast. 5 for Windows and Google Earth 6. Lzip is an open source and free command-line program, a lossless data compressor based on the LZMA (Lempel-Ziv-Markov chain) compression algorithm, which features a command-line interface similar to the one of bzip2 utility, as well as very safe integrity checking. LZMA uses a dictionary compression algorithm (a variant of LZ77, with huge dictionary sizes and special support for repeatedly used match distances), whose output is then encoded with a range encoder, using a model to make a probability prediction of each bit. By Brian Lindholm. Compress files and folders using sevenzipsharp and 7-Zip in C# sevenZipCompressor. On Friday, developer Adam Borowski sent out a set of 17 patches adding kernel compression for Zstd. 0 from OpenMandriva Unsupported Release repository. c vs multi-block-with-embedded-filename H. To configure the lzma_stream for compression, you will use the lzma_easy_encode function. xenial (16. Related: LZIP is better than 7-zip. Is there some explanation somewhere of LZMA's "multiple file" advantage? At face value it seems to me that in most cases on Linux the compression would be done on a single tar file. It offers a very wide range of compression / speed trade-off, while being backed by a very fast decoder (see benchmarks below). Unfortunately you cannot use 7zip for streams like gzip or bzip2. How to Compress and decompress files in Linux…Compressing is a very useful process when backing up important files as well as sending large files over the internet. The Lempel-Ziv-Markov chain algorithm (LZMA) is an algorithm used to perform lossless data compression. Resources Projects. but it will KP if the compression parameter is other than default, for example if i try lzma -e -9 -z for initramfs image it will leads to KP. xz format, but the legacy. rpm for Lx 4. xz format, but also the legacy. BZIP2 strikes a balance between efficient compression and speed… it's way faster than LZMA and can actually deliver better compression. The LZMA Compressed file type, file format description, and Mac, Windows, Linux, and Android programs listed on this page have been individually researched and verified by the FileInfo team. Features High compression ratio in new 7z format with LZMA compression. The core of the XZ Utils compression code is based on LZMA SDK, but it has been modified quite a lot to be suitable for XZ Utils. Comparison of Brotli, Deflate, Zopfli, LZMA, LZHAM and Bzip2 Compression Algorithms Jyrki Alakuijala, Evgenii Kliuchnikov, Zoltan Szabadka, and Lode Vandevenne Google, Inc. Create TAR and GZ archives used on Linux and Unix systems. lzma suffix is and how to open it. xz container format. For 7za you usually need to pipe tar output into the program. The LZMA Compressed Tarball file type, file format description, and Mac, Windows, and Linux programs listed on this page have been individually researched and verified by the FileInfo team. To expand compressed file (decompresses) you can use and gzip -d, bunzip2 (bzip2 -d), unzip commands. The linux port is p7zip. In the process, he's also aiming to drop LZMA1 and BZIP2 compression support for kernel images. 1 Creating and Reading Compressed Archives. 7-Zip is a file archiver supporting 7z (that implements LZMA compression algorithm featuring very high compression ratio), LZMA2, XZ, ZIP, Zip64, CAB, RAR (if the non-free p7zip-rar package is installed), ARJ, GZIP, BZIP2, TAR, CPIO, RPM, ISO, most filesystem images and DEB formats. LZMA Compression: This test measures the time needed to compress a file using LZMA compression. Pdlzip is also able to decompress legacy lzma-alone (. zip files, but there is more to archives than just the humble. When creating archives both support the -a switch to automatically filter the created archive through the right compression program based on the file extension. LZMA is mostly used for the Linux operating systems. Looking at the options of xz and lzma, I can't for the life of me figure out how to compress multiple files into one archive. rpm for Lx 4. GNU tar is able to create and read compressed archives. 10, automatically detect compressed files. In this tutorial, we will show you the various Linux's archiving and compression commands and the proper way to make use of them. MariaDB with LZ4 Compression Howto for CentOS I really really wanted to run the latest MariaDB with LZ4 Page Compression. Also included is a file interface supporting the. lzma file formats used by the xz utility, as well as raw compressed streams. xz is a compression format based on the LZMA2 compression algorithm. The Lempel-Ziv-Markov chain-Algorithm (LZMA) is an algorithm used to perform data compression. It has been under development since either 1996 or 1998 by Igor Pavlov and was first used in the 7z format of the 7-Zip archiver. This algorithm uses a dictionary compression scheme somewhat similar to LZ77 and features a high compression. Many of the archiving formats are now synonymous with the compression algorithm they use. How do I open or extract a. To expand compressed file (decompresses) you can use and gzip -d, bunzip2 (bzip2 -d), unzip commands. The Ubuntu alternate cd is running low on space as always and LZMA can compress much tighter than gzip or bzip2, so we intend to allow packages to use LZMA compression as an alternative to gzip and bzip2. use 7z / LZMA / LZMA2 / XZ compression. 30 , new compression options have been recently added to the kernel. Hi all, I am working on a OS which is in the livecd fomat(its also installable). Zipping a file is an example of compression. The file is used by 7-Zip among other file archivers. tar archive and then compress it with gzip or bzip2 compression in a single command. MariaDB with LZ4 Compression Howto for CentOS I really really wanted to run the latest MariaDB with LZ4 Page Compression. lzma offers better compression rates than gzip or bzip2. The native file format is the. Compression: LZ4, zlib, LZMA, zstd (since borg 1. 1; So you will have to pipe your tarball manually to the lzma binary. The Preset parameter controls the compression level. Compression rate in 7zip format is better than in ZIP format. LZMA is mostly used for the Linux operating systems. LZMA The Lempel-Ziv-Markov chain algorithm (LZMA) is an algorithm used to perform lossless data compression. xz and 7za compression programs. Launchpad Entry: dpkg-lzma. 7zip is popular tool and compression format. The manual is available in the info system of the GNU Operating System. Create TAR and GZ archives used on Linux and Unix systems. Compressing files under Linux or UNIX cheat sheet. Streamed vs. lzma files are un-openable, the linux kernel is clearly visible in plain text. The primary design goal of cromfs is compression power. xz and legacy. bzip2/lzma: x86 kernel compression support bzip2/lzma: fix built-in initramfs vs CONFIG_RD_GZIP bzip2/lzma: fix decompress_inflate. lzma files The uncompressed size of the file can be stored in the. The Lempel-Ziv-Markov chain algorithm (LZMA) is an algorithm used to perform lossless data compression. compress (string [, level]) ¶ Compresses the data in string, returning a string contained compressed data. In the process, he's also aiming to drop LZMA1 and BZIP2 compression support for kernel images. The most famous one is tar. 7z archive from your computer directly online. The data is then either: Compressed by LZMA (default), which gives excellent compression at approximately twice the speed of bzip2 compression. This algorithm uses a dictionary compression scheme somewhat similar to LZ77 and features a high compression. xz compresses or decompresses. The ZIP file format is a data compression and archive format. Download lzma linux packages for CentOS, Debian, Fedora, FreeBSD, Mageia, NetBSD, OpenMandriva, openSUSE, PCLinuxOS, ROSA, Ubuntu. The native file format is the. While both of them uses the same compression algorithm by default, xz is considered more up-to-date and feature rich, with lzma being somewhat legacy tool. there's no real difference between lzma and lzma2 in terms of compression ratio, compression. Compression tools on linux -- gzip vs bzip2 vs lzma vs compress There are numerous compression tools available on linux, more for other platforms, you can find lots of comprehesive compreson articles too. compress (string [, level]) ¶ Compresses the data in string, returning a string contained compressed data. [20 Jan 2016 19:36:17 EST] - Update against upstream and switch file compression to using Linux kernel snapshot. lzma files when decompressing. lzma is tarball file compressed with LZMA (Lempel-Ziv-Markov chain Algorithm) compression, and thus uses the compound file extension ". lzma files | linux commands examples - Thousands of examples to help you to the Force of the Command Line. 04LTS) (utils): Compression and decompression in the LZMA format - command line utility. 7zip for PC is actually an open-source program that is under GNU LGPL license, made for Microsoft Windows. The version available for Linux is known as p7zip package. Compression ratio. pts/compress-lzma-1. Supported formats: Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR; Free 7-Zip Software Linux. lzma file format, or accept only. LZ4 is lossless compression algorithm, providing compression speed > 500 MB/s per core (>0. Documentation. I have a lzma compressed initrd which is copied into sdram. After the limit is reached, compress periodically checks the compression ratio. 38 or higher.