Btrfs recompress how to#
Btrfs recompress install#
Btrfs recompress software#
Btrfs recompress code#

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. 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. Also I noticed that btrfs defragment without setting a compression option keeps the current compression thats on the file which is nice, I always thought that it would decompress the file, this was annoying when using other zstd levels because the defrag tool doesnt support setting the zstd level, nice to know it keeps it. 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 Without compression session storage would be regularly outdated on HDDs and would wear out consumer SSDs faster.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 I'll be using a lot of linux commands to make things easier to read, if you'd like to learn about them you can use `man (92160-31422463, default 31422463): +1.5GĬreated a new partition 2 of type 'Linux' and of size 1.5 GiB.ĭouble check that the partition begins on exactly the same sector as before, then write our changes to disk.# Decompressor/compressor for files in Mozilla's 'mozLz4' format.

I'll attempt to explain my reasons for various choices as we proceed. ?' questions should be easily Googleable and are beyond the scope of this document. This is a (relatively) quick and dirty guide, if you're interested in using Btrfs I assume you're a reasonably savvy user so I've glossed over a number of things. I've done my best to thoroughly cover any gotchas relating to boot configuration. Most of this can be done over SSH once you've prepped and installed your SD card, but you'll need physical access to plug/unplug storage and diagnose any misconfigurations during boot.

Btrfs recompress how to#

Additionally we'll explore leveraging Btrfs snapshots to make inexpensive weak backups, send those backups remotely as differentials and demonstrate how to revert to a prior operating system state quickly and easily.

Btrfs recompress install#

We'll step through configuration of a new install of Raspbian lite on a freshly written SD card and discuss at a higher level the steps needed to convert an existing install. This document will guide you through the process of configuring a boot-time mountable Btrfs root filesystem on Raspbian Jessie. Raspbian Btrfs root filesystem guide (2017-06)