Adam Kaminski thimslugga

EBS Troubleshooting

Common symptoms of storage performance related issues:

Application is slow in completing work
Performance issues present with high levels of disk io -- including iops and throughput (latency:await) issues.
The %iowait is high and/or %system is high (if using LUKs encryption on storage).

Troubleshooting:

Experimental but very promising pip replacement that handles package managing as well as virtual environments and Python version management.

uv comes included with uvx, an alias for uv tool run. uvx allos you to install and execute command-line tools on an ephemeral environment.

Note that you don't have to actively install a Python version! uv will automatically fetch the required Python version for your project.

	from ctypes import CDLL, byref, c_uint32
	Security = CDLL('/System/Library/Frameworks/Security.framework/Versions/Current/Security')

	kcallerSecuritySession = c_uint32(-1)
	my_session = c_uint32(0)
	session_bits = c_uint32(0)

	result = Security.SessionGetInfo(kcallerSecuritySession, byref(my_session), byref(session_bits))

	flags = session_bits.value

	#!/bin/bash
	VER="0.94.2";
	SCRIPTTITLE="PV - HVM - version $VER";
	RED=$(tput setaf 1)
	GREEN=$(tput setaf 2)
	NORMAL=$(tput sgr0)

	# Configure logging
	tmp="/tmp"
	logfile="$tmp/$(basename $0).$$.log"

	AWSTemplateFormatVersion: '2010-09-09'

	Description: Extreme Performance Tuning Benchmark Environment


	Parameters:
	AmiId:
	Type: AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>
	Default: '/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2'

	FROM php:8.2-fpm-alpine

	ADD https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin/

	RUN \
	chmod +x /usr/local/bin/install-php-extensions \
	&& install-php-extensions \
	apcu bcmath bz2 ldap pdo_mysql pdo_pgsql exif sysvsem smbclient intl imap pcntl soap imagick gmp gd zip

	#!/bin/bash
	set -e

	# https://github.com/orgs/amazonlinux/repositories
	# https://github.com/amzn/amzn-drivers/issues/241#issuecomment-1282274014
	# https://www.artembutusov.com/how-to-rebuild-amazon-linux-kernel-in-amazon-linux
	# https://docs.aws.amazon.com/linux/al2023/ug/kernel-hardening.html
	# https://kspp.github.io/
	# https://github.com/a13xp0p0v/linux-kernel-defence-map
	#https://github.com/a13xp0p0v/kernel-hardening-checker/

	!#/bin/bash

	SRC_DIR=/Volumes/storage/Media/Movies
	DST=rsync://<server>:30026/movies
	EXCLUDE_FILE=.rsync_exclude

	if [ "$1" == "test" ]; then
	RSYNC_START="/opt/homebrew/bin/rsync --dry-run"
	else
	RSYNC_START="/opt/homebrew/bin/rsync"

	FROM --platform=$BUILDPLATFORM alpine:latest

	WORKDIR /

	RUN \
	apk --no-cache add \
	ca-certificates \
	tzdata \
	shadow \
	su-exec