What it is: An Auto Scaling feature that changes desired capacity based on a schedule (date/time).

What it’s for:

• Handle predictable traffic spikes (end-of-month payroll, daily batch windows).
• Ensure instances are ready before load starts.

Key ideas:

• Use a scheduled action to set desired capacity at a specific time.
• Keep min/max as normal guardrails; don’t lock them to peak values unless you truly want fixed capacity.

Exam cue:

• “spike at a known time (every month/day)” → Scheduled scaling.

Hard words (English + IPA + Vietnamese meaning):

• *scheduled* /ˈskedʒuːld/: theo lịch
• *desired capacity* /dɪˈzaɪərd kəˈpæsəti/: số lượng mong muốn
• *guardrail* /ˈɡɑːrdeɪl/: rào chắn giới hạn (min/max)
• *predictable* /prɪˈdɪktəbl/: dự đoán được