You can also specify the level of compression you want. The Btrfs filesystem supports the ZSTD data compression algorithm. Its compression ratio is comparable to the DEFLATE algorithm that is used in ZLIB, but it’s faster. It was developed at Facebook by Yann Collect. ZSTD: ZSTD or Zstandard is a high-performance lossless data compression algorithm. Unless you specify a ZLIB level of compression to use, the Btrfs filesystem will use the ZLIB compression level 3 by default. So, level 9 will save more disk space than level 1 (level 9 has a higher compression ratio than level 1). A higher level indicates a higher compression ratio. The Btrfs filesystem supports the ZLIB data compression algorithm. The DEFLATE data compression algorithm is a combination of the LZ77 and Huffman coding algorithms. It uses the DEFLATE data compression algorithm. Ii) ZLIB: ZLIB is a library used for data compression. It is the default compression algorithm of the Btrfs filesystem. LZO divides the data into blocks and compresses/decompressed the data by blocks in real-time. I) LZO: LZO is a lossless real-time block compression algorithm. Btrfs Compression Algorithms:Īt the time of this writing, the Btrfs filesystem supports the following compression algorithms:
#Btrfs recompress install#
If you need any assistance installing the Btrfs filesystem on Fedora, check my article Install and Use Btrfs on Fedora 33. If you need any assistance installing the Btrfs filesystem on Ubuntu, check my article Install and Use Btrfs on Ubuntu 20.04 LTS. So, make sure to replace them with yours from now on. Besides, apps generally can't just tell OS to transparently compress arbitrary files, and asking end user to go X and toggle Y to make browser responsive or less write-intensive would definitely not help its market share.Your hard disk or SSD may have a different name than mine, so will the partitions. ext* don't have it, XFS doesn't have it, HFS on older OS X required use of Apple-specific APIs for compression to work (i.e. But you can't say for sure that "there is absolutely no need for LZ4" here.Īnd modern file systems (including ext2, ext3, ext4, btrFS, NTFS, ZFS) offer transparent compression functionality. SQLite db in WAL mode (provided it could be updated incrementally) would be much better. Sure, LZ4 in standard frame format would be better. That's a lot of writes if you have significant number of tabs open! Without compression session storage would be regularly outdated on HDDs and would wear out consumer SSDs faster. LZ4 is not bad in itself, but LZ4 for Firefox certainly is a bad what you're missing is the fact that in order to be up-to-date, session files need to be constantly updated. "Could not write to output file `%s': %s" % ( "Could not compress/decompress file `%s': %s" % ( `-' means standard output (and is the default)." Help = "Decompress the input file instead of compressing it." read())ĭescription = "MozLz4a compression/decompression utility" Raise ValueError( "Invalid magic number") # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT # DATA, OR PROFITS OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE, # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL IN NO EVENT SHALL THE COPYRIGHT HOLDER OR # FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
#Btrfs recompress software#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR # conditions and the following disclaimer in the documentation and/or other materials provided Redistributions in binary form must reproduce the above copyright notice, this list of
#Btrfs recompress code#
Redistributions of source code must retain the above copyright notice, this list of conditions # provided that the following conditions are met: # Redistribution and use in source and binary forms, with or without modification, are permitted # Copyright (c) 2015-2022, Tilman Blumenbach # - LZ4 bindings for Python, version 4.x: # This file format is in fact just plain LZ4 data with a custom header (magic number and # Decompressor/compressor for files in Mozilla's "mozLz4" format.
0 kommentar(er)
