Full rewrite of https://github.com/diamondburned/sysmet in Rust (store data in a MessagePack file, sysmet-update and sysmet-http)
Warning it is not compatible with the original databases
For example you can run sysmet-update with cron every 5min and purge data older than 2 days
*/5 * * * * /<path to>/sysmet-update -db /<path to>/database -gc 2