Erich B ebirn

Usage

Export your data from Prometheus: https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/README.md#how-to-export-time-series
Run this script on the new data python3 delete_timeseries.py -i imported_file.json -o output_file.json --from [unix timestamp] --to [unix timestamp]
Delete original data from Prometheus: https://docs.victoriametrics.com/#how-to-delete-time-series
Import the converted data: https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/README.md#how-to-import-time-series-data

Note that the response cache must be deleted after these steps in order to remove previously cached results - see more details here.

Today I wanted to move existing APFS-resident macOS Catalina installation to a new disk. I upgraded my late 2014 Mac Mini with a shiny new 1TB SSD. This took way too many hours of my life I will never get back. Hope this saves some time to you.

Good news:

it is possible to create a DMG image from existing APFS container with macOS Catalina installation including metadata needed for complete restore (the DMG contains OS, OS Data, Preboot, Recovery and VM volumes)
it is possible to restore this DMG image into empty APFS container and get a bootable copy of the original system

This information is relevant for Catalina (I'm currently running macOS 10.15.1).

'Users hate change'

This week NN Group released a video by Jakob Nielsen in which he attempts to help designers deal with the problem of customers being resistant to their new site/product redesign. The argument goes thusly:

Humans naturally resist change
Your change is for the better
Customers should just get used to it and stop complaining

There's slightly more to it than that, he caveats his argument with requiring you to have of course followed their best practices on product design, and allows for a period of customers being able to elect to continue to use the old site, although he says this is obviously only a temporary solution as you don't want to support both.

SKS Keyserver Network Under Attack

This work is released under a Creative Commons Attribution-NoDerivatives 4.0 International License.

Terminological Note

"OpenPGP" refers to the OpenPGP protocol, in much the same way that HTML refers to the protocol that specifies how to write a web page. "GnuPG", "SequoiaPGP", "OpenPGP.js", and others are implementations of the OpenPGP protocol in the same way that Mozilla Firefox, Google Chromium, and Microsoft Edge refer to software packages that process HTML data.

Who am I?

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

	#!/usr/bin/env python3

	import sys
	import re

	"""
	Decode kernel message from mpt*sas, like:
	mpt3sas_cm0: log_info(0x31120303): originator(PL), code(0x12), sub_code(0x0303)
	mpt2sas_cm0: log_info(0x31120303): originator(PL), code(0x12), sub_code(0x0303)

	#!/usr/bin/python3

	import http.client
	import http.server
	import json
	import ssl
	import urllib.parse

	# AWX connection and job template details:
	AWX_HOST = 'tower.private'

	-- Description:
	-- ------------
	--
	-- This is an example schema for storing collectd metrics in a TimescaleDB
	-- dabase (see https://www.timescale.com/). It is based on the PostgreSQL
	-- schema contributed by Sebastian Harl.
	--
	-- Prerequisities:
	-- ---------------
	--

	1. Setup a project

	2. Add groovy SDK support:
	https://www.bonusbits.com/wiki/HowTo:Add_Groovy_SDK_to_IntelliJ_IDEA

	3. Download http://(yourjenkinsurl)/job/(yourpipelinejob)/pipeline-syntax/gdsl
	- this will give you the .gdsl file - download this to the src folder of your project.

	4. Finally follow this step - right click on the src folder -> Mark directory as -> Sources Root

	#!groovy

	/*
	* This script configures the Jenkins base URL.
	*/

	import jenkins.model.JenkinsLocationConfiguration

	JenkinsLocationConfiguration location = Jenkins.instance.getExtensionList('jenkins.model.JenkinsLocationConfiguration')[0]
	location.url = 'https://jenkins-as-code-poc.devtail.io/'