atyachin

Android Emulator (ARM64) on EC2 - 2022
---------------------------------------
1. Launch EC2 ARM based Instance (a1.metal / a1.2xlarge): (16 Gb RAM, 32Gb Disk), Ubuntu Server 22.04 LTS (HVM) ARM x64
2. sudo apt update && sudo apt upgrade
3. sudo apt install default-jdk python3-pip repo python-is-python3 unzip libpcre2-dev adb
4. wget https://dl.google.com/android/repository/commandlinetools-linux-8512546_latest.zip 
5. unzip commandlinetools-linux-8512546_latest.zip -d android-sdk
6. sudo mv android-sdk /opt/
7. mkdir /opt/android-sdk/cmdline-tools/latest
8. mv /opt/android-sdk/cmdline-tools/* /opt/android-sdk/cmdline-tools/latest  (ignore the error)

slok

Enable profiling

Default http server

import (
    _ "net/http/pprof"
    "net/http"
)

den-crane

ClickHouse server version 18.14.12 revision 54409.


create table data(K Int64, V String) engine=MergeTree order by K;
insert into data select number, toString(number) from numbers(100,100000000);
optimize table data final;
create table buffer(K Int64, V String) engine=Memory;
insert into buffer select number, toString(number) from numbers(0,1000);

marcan

#!/boot/bzImage

# Linux kernel userspace initialization code, translated to bash
# (Minus floppy disk handling, because seriously, it's 2017.)
# Not 100% accurate, but gives you a good idea of how kernel init works
# GPLv2, Copyright 2017 Hector Martin <marcan@marcan.st>
# Based on Linux 4.10-rc2.

# Note: pretend chroot is a builtin and affects the current process
# Note: kernel actually uses major/minor device numbers instead of device name

epiphani

So Hive in CDH is horribly, painfully slow. Cloudera ships Hive 1.1, which is actually moderately modern. It is, however, very badly configured out of the box and patched with custom code from Cloudera. With a bit of effort, we managed to improve hive performance considerably. We really shouldn't have to do this, but Cloudera is actively working against supporting a performant Hive.

First, building Tez was fairly straightforward. Using the instructions at https://github.com/apache/tez/blob/master/docs/src/site/markdown/install.md, the only change was to use the version string "2.6.0" for the build. I believe that was the default. Don't use the CDH string, it won't work.

At the bottom of the installation instructions, there's mention of the fact that to use the local hadoop jars (rather than those packaged with tez) you must unpack the jars in HDFS rather than using the tarball. In this case, unpack the tez-minimal tarball and upload the contents to /apps/tez-0.7.0 (or whatever you prefer). Don't fo

nolanlawson

// Promise.all is good for executing many promises at once
Promise.all([
  promise1,
  promise2
]);

// Promise.resolve is good for wrapping synchronous code
Promise.resolve().then(function () {
  if (somethingIsNotRight()) {
    throw new Error("I will be rejected asynchronously!");

cben

isaacs

# Hello, and welcome to makefile basics.
#
# You will learn why `make` is so great, and why, despite its "weird" syntax,
# it is actually a highly expressive, efficient, and powerful way to build
# programs.
#
# Once you're done here, go to
# http://www.gnu.org/software/make/manual/make.html
# to learn SOOOO much more.

romaninsh

create this file in your /root folder

$ fleetctl load swapon.service
$ fleetctl start swapon.service

This will create swap file on all nodes of your CoreOS cluster without prior setup.

See also http://cloudinit.readthedocs.org/en/latest/topics/examples.html#adjust-mount-points-mounted

grugq

Operational PGP

This is a guide on how to email securely.

There are many guides on how to install and use PGP to encrypt email. This is not one of them. This is a guide on secure communication using email with PGP encryption. If you are not familiar with PGP, please read another guide first. If you are comfortable using PGP to encrypt and decrypt emails, this guide will raise your security to the next level.