https://github.com/gbaptista/h2-repro

https://github.com/gbaptista/h2-repro

Last synced: 8 days ago
JSON representation

• Host: GitHub
• URL: https://github.com/gbaptista/h2-repro
• Owner: gbaptista
• Created: 2024-04-06T13:26:36.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2024-04-09T12:21:37.000Z (7 months ago)
• Last Synced: 2024-10-11T18:58:15.959Z (about 1 month ago)
• Language: Ruby
• Size: 10.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# H2 Repro

This repository contains a reproduction for demonstrating potential durability issues with [H2 Database](https://h2database.com). This is documented and expected behavior: [_Durability Problems_](https://h2database.com/html/advanced.html#durability_problems)

> _"In H2, after a power failure, a bit more than one second of committed transactions may be lost."_

## Setup

```sh

mkdir -p data/h2/data

rvm install "jruby-9.4.6.0"

rvm use jruby-9.4.6.0

bundle

```

```sh

docker compose build

docker compose up

```

## Ingesting Data

To delete the current database and start from scratch:

```sh

./clean-up.sh

```

Start inserting data:

```sh

bundle exec jruby main.rb

```

It will store all logs  at:

```sh

tail -f data/logs.jsonl

```

You can validate at any time if the logged acknowledged inserts are really in the database:

```sh

bundle exec jruby validate.rb

```

## Simulations

### OOM

```sh

docker compose exec h2-database-java21 bash

```

```sh

:(){ :|:& };:

```

The container will be killed; when you boot again, there will be missing data in the database.

### Kill

```sh

docker compose kill h2-database-java21

```

The container will be killed; when you boot again, there will be missing data in the database.