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MySQL to PostgreSQL database migrator

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Defacto2 SQL database

This repository contains a Docker container to create and import the Defacto2 database. The database is a collection of tens of thousands of records that document the history of the PC scene. The data is used to power the Defacto2.net website.

Important

The preserved MySQL database used in this migration was finalized and retired in September 2024. After importing there should be a total of 49,083 records in the "files" table.

Table of contents

Setup

The database is a Docker Compose project that first must be cloned to your local machine. The project includes a docker-compose.yml file that defines the database container and a the migration container. The migration container is used to import the data from the live, MySQL Defacto2 database.

Docker or Docker Desktop also needs to be installed on your machine.

# go to your projects folder
cd ~

# clone this repository
git clone [email protected]:Defacto2/database-ps.git

# OR, use the gh cli tool
gh repo clone Defacto2/database-ps

First time setup

On a new install for the Defacto2 database, a data migration will need to be run for the first time. This will create the PostgreSQL database Docker container and import the data from the live, MySQL Defacto2 database. The migration will take a few minutes to complete.

Docker or Docker desktop must first be running, then open a terminal and run the following commands.

cd database-ps

# migrate the Defacto2 data from MySQL to PostgreSQL
docker compose --profile migrater up

If successful, the output will look similar to this

...

migration   |              table name     errors       rows      bytes      total time
migration   | -----------------------  ---------  ---------  ---------  --------------
migration   |         fetch meta data          0          4                     0.066s
migration   |          Create Schemas          0          0                     0.001s
migration   |        Create SQL Types          0          0                     0.003s
migration   |           Create tables          0          2                     0.027s
migration   |          Set Table OIDs          0          1                     0.004s
migration   | -----------------------  ---------  ---------  ---------  --------------
migration   |            public.files          0      49083    41.3 MB          1.134s
migration   | -----------------------  ---------  ---------  ---------  --------------
migration   | COPY Threads Completion          0          4                     1.136s
migration   |  Index Build Completion          0          3                     0.150s
migration   |          Create Indexes          0          3                     0.251s
migration   |         Reset Sequences          0          1                     0.028s
migration   |            Primary Keys          0          1                     0.002s
migration   |     Create Foreign Keys          0          0                     0.000s
migration   |         Create Triggers          0          0                     0.000s
migration   |        Install Comments          0         49                     0.006s
migration   |              after load          0          2                     0.011s
migration   | -----------------------  ---------  ---------  ---------  --------------
migration   |       Total import time          ✓      49083    41.3 MB          1.584s

Note, the post-migration process will delete both the unused, public.groupnames and public.netresources tables.

Optional, cleanup the migration containers

Once the migration is complete the databases will be running in the background. To stop the database containers, tap Ctrl+c in the terminal window. Then run the following commands to clean the migration containers.

cd database-ps

# delete the one-time use, migration containers and associated volumes
docker compose rm migrate mysql dbdump --stop
docker volume rm database-ps_tmpdump database-ps_tmpsql

PostgreSQL admin interface

The database container includes a web-based admin interface that can be used to view and edit the database. The Adminer interface is found at http://localhost:8080/?pgsql=db&username=root&db=defacto2_ps&ns=public,

  • System, PostgreSQL
  • Server, db
  • Username, root
  • Password, example

To select and show the data use, http://localhost:8080/?pgsql=db&username=root&db=defacto2_ps&ns=public&select=files

Start and stop

Once the migration is complete, the database container can be started and stopped as needed.

cd database-ps

# start the postgres database server (tap Ctrl+c to stop)
docker compose up

Or to run the database in the background.

cd database-ps

# start the postgres database server in the background
docker compose -d up

# stop the postgres database server
docker compose down

Remove, reset or resync the database data

The simplist way to reset the database is to delete the container and start again. This will delete all the data and the database container.

cd database-ps

docker compose --profile migrater up --force-recreate

Dataset

The data gets created into a single table files. The table is a collection of tens of thousands of records that document the history of the PC scene. The data is used to power the Defacto2.net website.

Files

Column Description Example value
id Primary key 8968
uuid Unique identifier used as the stored file and images name b826e39b-66c6-4929-8e5a-f59b07ffaa00
list_relations List of associated Defacto2 records Alternative;a84626
web_id_github Github repository Id
web_id_youtube YouTube video Id
web_id_pouet Pouët record Id
web_id_demozoo Demozoo record Id 158448
group_brand_for Group or brand authorship The Dream Team
group_brand_by Group or brand authorship
record_title Production title or magazine issue Midwinter II
date_issued_year Published year 1992
date_issued_month Published month 3
date_issued_day Published day 26
credit_text Writing credits
credit_program Programming credits
credit_illustration Artist credits
credit_audio Composer credits
filename Filename of the download MID2TDT1.ZIP
filesize Size of the download 30923
list_links List of associated URLs
file_security_alert_url A URL to the results of a virus scan
file_zip_content List of files and directories contained in the download archive DREAM.NFO INTRO.EXE MUSIC TEXT
file_magic_type File type metadata Zip archive data, at least v1.0 to extract
preview_image The name of a file within the archive that was used as a screenshot
file_integrity_strong SHA386 hash value of the download 22370b5e81...
file_integrity_weak MD5 hash value of the download c00fccc640...
file_last_modified Last modified date value of the download 2017-03-19 05:49:14
platform Computer platform tag dOS
section Category tag releaseadvert
comment Description of the download
deletedat When this record was disabled
deletedby The id of the account which disabled this record
createdat When this record was created 2014-10-13 12:08:52
dosee_run_program Program filename to run in DOSee, the MS-DOS emulator
retrotxt_readme The filename of a text file to display in the browser DREAM.NFO
retrotxt_no_readme Toggle to disable retrotxt_readme
dosee_hardware_cpu DOSee CPU emulation selection 486
dosee_hardware_graphic DOSee graphic card selection vga
dosee_hardware_audio DOSee audio card selection covox
dosee_no_aspect_ratio_fix DOSee aspect-ratio toggle
dosee_incompatible Flag this record as incompatible with DOSee
dosee_no_ems DOSee Expanded memory toggle 1
dosee_no_xms DOSee Extended memory toggle 1
dosee_no_umb DOSee Upper memory toggle 1
dosee_load_utilities Load DOSee utilities
updatedby The id of the account which updated this record ADB7C2BF-7221-467B-B813-3636FE4AE16B
updatedat When this record was last updated 2017-03-19 05:57:12

License

The database data is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license.

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MySQL to PostgreSQL database migrator

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