====== Scheduled Scaling (Auto Scaling) ======

**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