Convert from ‘mod_php and apache-mpm-prefork’ to ‘php-fpm and mpm-event’ at Debian 10 Buster

Per default most Apache+PHP installations on Debian are using Apache with the modules MPM-Prefork and PHP (mod_php).

Besides from getting a small tuning and running the newer MPM, there is one important change, if you switch such a setup to PHP-FPM + Apache MPM-Event: You can then use HTTP/2.

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ZFS compression

Enable it with:

zfs set compression=lz4 <poolname|datasetname|volumename>

(lz4 is fast and good – afaik the recommendation for ZFS on Linux)

Check the ratio with:

zfs get compressratio