Language for the standalone scripts that back up, clean, scan and monitor Plesk servers, and for how those scripts are released and kept up to date.
Subscription: The Plesk unit that owns a set of domains and runs its processes under one system user. It is the unit CPU load is attributed to. Avoid: Website, site, account, customer
Vhosts root:
The directory under which Plesk keeps every subscription's files, by default /var/www/vhosts.
Avoid: Web root, sites directory
Self-update: A script replacing itself with a newer published version, on request or automatically. Avoid: Auto-upgrade, patch
Gated update: A self-update that installs only a script published in a release and verified against that release's checksums. If verification fails, the current version is kept. Avoid: Safe update, signed update
Release: A dated, tagged snapshot of every script, published with checksums. It is the only source a self-update installs from. Avoid: Version, build, deploy
Platform parity: Keeping the Windows and Linux versions of a script in step. It applies only to scripts that already ship both versions, and the Windows version may be a documented subset. Avoid: Cross-platform support
Retention: How long a backup is kept before it becomes eligible for deletion, with a minimum number of the newest backups per domain always kept. Avoid: Expiry, TTL
Dry run: A run that reports what would be deleted without deleting anything. Avoid: Preview mode, simulation
Sustained load: Server load that stays above the load threshold for at least 80% of samples across a 30-minute window. A brief spike is not sustained load. Avoid: High CPU, spike, load average
Load threshold: The load level, scaled by core count, above which a sample counts toward sustained load. Avoid: Limit, cutoff
Offender: An IP address responsible for attack-like traffic against a subscription, either because a fail2ban jail has banned it or because its request pattern looks like a bot scan or attack. Avoid: Attacker, bad IP
Banned offender: An offender currently in the banned list of any fail2ban jail except the SSH jail. Avoid: Blocked IP
Handled attack: An attack where banned offenders account for at least 80% of the attack traffic, so fail2ban is already containing it and no alert is needed. Avoid: Mitigated, resolved
Incident: One continuous period of sustained load, from the moment it is detected until load drops back below the threshold. Avoid: Event, outage