Mic92

9 1 0x01 147 39984 2088515013 55466767689355
name                            type data
hits                            4    227098528
iohits                          4    162963
misses                          4    1148629
demand_data_hits                4    48027529
demand_data_iohits              4    659
demand_data_misses              4    267582
demand_metadata_hits            4    178122149
demand_metadata_iohits          4    4992

Mic92

Disko это утилита и модуль Nixos для декларативной разметки дисков.

Каталог Документации Disko

Использование

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import glob
import re
import sys
import os
import subprocess
import curses.ascii
import binascii
from typing import Tuple, Optional

def parse_network_manager(filename: str) -> Tuple[Optional[str], Optional[str]]:

Mic92

# Containers

General introduction to containers/namespaces/cgroups (40min): https://www.youtube.com/watch?v=GMs3kLteZvk

Slides: https://github.com/ls1-adv-sys-prog-course/docs/blob/main/slides/01-containers.pdf

Assignment explained (10min): https://www.youtube.com/watch?v=INyb4Rj073U

## Intro

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First generate the image script:

$ nix build .#nixosConfigurations.myhost.config.system.build.diskoImagesScript

Next we build the image:

$ sudo ./result --build-memory 2048

Mic92

Tvix is a new implementation of the Nix language and package manager. In this benchmark we test it's performance when instantiating the hello package from nix. Note that at the time tvix does not have its own store implementation yet and it has to execute nix-store whenever it needs to copy files to the store.

Mic92

#!/usr/bin/env python3
import http.client
import json
import os
import time
import urllib.parse
import urllib.request
from pathlib import Path
from typing import Any

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## USAGE
# $ nix-build kexec-installer.nix
# can be deployed remote like this
# $ rsync -aL -e ssh result/ root@host:
# $ ssh root@host ./kexec-installer
## Customize it like this
# # custom-installer.nix
# import ./kexec-installer.nix {
#   extraConfig = {pkgs, ... } {
#     user.extraUsers.root.openssh.authorizedKeys.keys = [ "<your-key>" ];

Mic92

#!/usr/bin/env nix-shell
#!nix-shell -i bash -p sqlite -p bash

SQL=$(cat <<EOF
select * from DerivationOutputs do    
  inner join ValidPaths vp on vp.id = do.drv
  inner join Refs r1 on r1.referrer = vp.id                          
  inner join ValidPaths vp2 on r1.reference = vp2.id
  where do.path GLOB '/nix/store/$1-*'
EOF

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{ pkgs ? import <nixpkgs> {} }:

let
  fixWrapper = pkgs.runCommand "fix-wrapper" {} ''
    mkdir -p $out/bin
    for i in ${pkgs.gcc.cc}/bin/*-gnu-gcc*; do
      ln -s ${pkgs.gcc}/bin/gcc $out/bin/$(basename "$i")
    done
    for i in ${pkgs.gcc.cc}/bin/*-gnu-{g++,c++}*; do
      ln -s ${pkgs.gcc}/bin/g++ $out/bin/$(basename "$i")