Testing scheduled jobs using faketime

Recently, I was tasked with testing some scheduled exports to investigate a defect. Unit tests should have caught it, but something else was going on. I had to simulate a real execution in a container by faking its internal clock. This is where I utilized faketime . faketime is a tool that manipulates system time for a specific program without changing the system's actual time. It works by…

dev.to ·1h ago

We haven't written up this one. Dev.to has the full story — the link below goes straight to it.

Read the original at dev.to →

More in Tech

Suspend, Background, Disown

I'm currently working on a hobby project, using crawlers to download media files for a dataset. Some of these are large files that also need preprocessing.

Press CTRL + Z to suspend a running process.
Resume suspended process in background with 'bg'.
Disown process using 'disown -h %1' for independence.

1h ago ·dev.to

PostgreSQL Generated Column vs Trigger: Which to Use for a Derived Column

Disclosure: I build Schemity , a desktop ERD tool - this post is from our blog and uses it for the examples. TL;DR: Use a generated column when the value comes from other columns in the same row…

1h ago ·dev.to

No measurement, no optimization

No measurement, no optimization. There's a common saying in programming: "Don't optimize what you haven't measured yet." You can only truly appreciate this advice when you experience it yourself.

Optimization should follow performance measurement
Database queries caused most performance issues
Combined queries had higher average response time

1h ago ·dev.to

Uptime Kuma on Fedora with Podman Quadlet

Over the weekend, I decided to set up Uptime Kuma on my mini-server. I needed a quick way to monitor some important work services, and Uptime Kuma’s Slack notifications make it easy to get alerts…

Uptime Kuma installed on Fedora mini-server for service monitoring
Podman Quadlet used to manage containers with declarative files
SELinux permissions adjusted and systemd service enabled via Quadlet

1h ago ·dev.to

Using fstab instead of autofs for a samba share

A few weeks ago, I borrowed a Raspberry Pi 4B from a friend. Since it wasn't going to be used for a while, I decided to set up a network storage for our home network.

Author used Samba for network storage on Fedora Server 38
Initial autofs and crypttab configuration failed due to race condition
Fstab permanently mounted drive, solved Samba access issue

1h ago ·dev.to

When Redis goes down, does your app die?

The Problem: The App Dies There was an incident that caused our application to fail because our Redis cache went down. It was in the middle of moving to a larger compute instance to handle a higher…

Redis cache failure significantly impacted application experience
Resilient Cache-Aside approach implemented to handle exceptions
Circuit Breaker pattern improved app performance and user experience

1h ago ·dev.to