systemd-swap
dduper
systemd-swap | dduper | |
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6 | 6 | |
550 | 162 | |
- | - | |
0.0 | 5.4 | |
over 2 years ago | 6 months ago | |
Python | Python | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
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systemd-swap
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I want to change my zRAM compression algorithm to zstd on openSUSE Tumbleweed
As a bonus, the systemd-zram-service's scripts will create zRAM devices based on the number of your CPU cores. This is problematic as it's a deprecated practice, and can also cause an issue on some multicore CPUs. Basically, we already have "multi stream functionality" since kernel 3.15. And since kernel 4.7, regardless of the value passed to [max_comp_streams], zRAM will always allocate multiple compression streams - one per online CPU - thus allowing several concurrent compression operations.
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What happens when there is no more swap partition is full and RAM is full? Does Linux swaps anyway in some other way (maybe swap files like Windows), or can't it swap anymore?
Historically, Linux has created an additional (fixed-size) swap partition or file. In case you mention you get OOM. But for some time there is a great project systemd-swap creating hybrid swap space. You can even find it in the official Arch Linux Community repo.
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PERSONAL OPINION: /Swapfile or Swap Partition?
There is also systemd/zram-generator that allows you to create and manage swap devices more easily. And Nefelim4ag/systemd-swap (abandoned?) that automatically creates swap files and resizes them based on RAM usage.
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Do I need to create a swap partition?
SwapFC - https://github.com/Nefelim4ag/systemd-swap
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A warning about 5.12-rc1
That sound like what systemd-swap does. Apparently, hibernation is not quite working yet, though.
https://github.com/Nefelim4ag/systemd-swap
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Can I mix zram with swapfc?
Disclaimer: I couldn't find anything relating to SwapFC other than from the README of systemd-swap. What I've written above is just based on the one-line description of SwapFC, as well as prior knowledge of zswap and zram (obtained from the Linux Kernel docs).
dduper
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NIST Retires SHA-1 Cryptographic Algorithm
In some cases deduplication happens at the file system layer transparently without you even realizing it. E.g. there are tools like https://github.com/lakshmipathi/dduper
I agree that image editing workflows are a different use case more suited to perceptual hashes than cryptographic hashes.
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Can I view the internal hash values for files?
ddupper uses a patched btrfs command to read file hases from the raw disk. It requires root access and is kind of a hack.
- Ask HN: Who Wants to Collaborate?
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Deduplication experiences with various tools?
There are various tools to use for COW deduplication, such as bees, duperemove, rmlint, jdupes, and dduper
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DSM 7: Release Candidate released!
Hmm, could we use something like dduper to achieve this, if they don't have it included?
What are some alternatives?
btrfs-progs - Development of userspace BTRFS tools
bees - Best-Effort Extent-Same, a btrfs dedupe agent
nohang - A sophisticated low memory handler for Linux
duperemove - Tools for deduping file systems
TempOSD - On Screen Display for cpu and gpu temperatures, ram and swap usages statistics.
dupeguru - Find duplicate files
uniswap-sushiswap-arbitrage-bot - Two bots written in JS that uses flashswaps and normal swaps to arbitrage Uniswap. Includes an automated demostration.
r8152 - Synology DSM driver for Realtek RTL8152/RTL8153/RTL8156 based adapters
zram-generator - Systemd unit generator for zram devices
jdupes - A powerful duplicate file finder and an enhanced fork of 'fdupes'.
snapper-gui - GUI for snapper, a tool for Linux filesystem snapshot management, works with btrfs, ext4 and thin-provisioned LVM volumes
Deduper - The goal of this project is to make a deduper program that anybody can run on their computer to save storage space.