https://jawr.github.io/jl-lu/tags/design/Recent content in design on jawrHugo -- gohugo.ioen-gb© {year}Mon, 25 Jan 2021 10:45:30 +0900https://jawr.github.io/jl-lu/blog/mx.ax-the-hows-and-why-of-the-database-schema-design/Mon, 25 Jan 2021 10:45:30 +0900https://jawr.github.io/jl-lu/blog/mx.ax-the-hows-and-why-of-the-database-schema-design/User isolation When creating a service that contains users who don’t require interaction with one other, it’s necessary to provide some assurances that their data will remain isolated. There are various strategies to try and ensure this isolation, each with their own benefits and issues. Below are the main ones: Silo, each user has their own database instance. Bridge, each user has their own database (schema) on a shared instance.https://jawr.github.io/jl-lu/blog/mx.ax-a-closer-look-at-smtp/Wed, 20 Jan 2021 09:56:13 +0900https://jawr.github.io/jl-lu/blog/mx.ax-a-closer-look-at-smtp/SMTP Simple Mail Transfer Protocol has been around for a long time and although it has been revised, extended and abused beyond its original intent, it does remain relatively simple. If you want to send an email to yourfriend@domain.com your client first needs to use DNS to discover where to send the email. This information is stored within the MX record, i.e. for lawrence.pm: ;; QUESTION SECTION: ;lawrence.pm. IN MX ;; ANSWER SECTION: lawrence.