grceng.academy
YAML lab 40 bonus XP

Specify a defensible recovery policy

Start labRead the room

Objectives

Translate Fenwick's approved requirements into explicit YAML fields. Do not confuse the oldest acceptable data with elapsed service recovery.

This exercise checks a declared policy, not a real backup or recovery implementation. Use the exact field values specified in the fixture.

Approved order-service requirements

objectives: RTO 4 hours; RPO 15 minutes; MTD 8 hours
backup: 3 total copies including production; 2 media types; 1 offsite copy; immutable recovery copy required
supplier: tested fallback required because primary recovery is 12 hours
exercise: simulation; retain timed results and retest findings

Checks the server runs (5)

  • Distinguish all three recovery clocks
  • Declare the approved 3-2-1 copy layout
  • Require an immutable recovery copy
  • Close the supplier gap with tested fallback
  • Specify practical rehearsal and retained evidence

Check names are all you see here: the expectations that decide pass or fail, and the reference solution, stay on the server.

Step-by-step hints

The guided walkthrough, in full. It is free: no XP cost, and it does not touch the paid hint ladder or the reveal gate.

  1. Step 1

    Translate the clocks

    Separate service elapsed time, acceptable data age, and the business impact boundary; preserve the requested units.

    Distinguish all three recovery clocks

  2. Step 2

    Count independent copies

    Count the working dataset in the total, then state media diversity and the offsite requirement.

    Declare the approved 3-2-1 copy layout

  3. Step 3

    Protect recovery history

    Declare the fixture's required protection from alteration rather than relying only on geographic distance.

    Require an immutable recovery copy

  4. Step 4

    Address the slow dependency

    The primary provider cannot meet the service target. State whether the alternate path has been exercised.

    Close the supplier gap with tested fallback

  5. Step 5

    Make the rehearsal auditable

    Choose the specified test type and explicitly preserve measured evidence and follow-up verification.

    Specify practical rehearsal and retained evidence

Rules summary

  • XP on pass

    40 bonus XP the first time every check goes green.

  • Paid hints

    2 available. Each costs 25% of the lab XP (about 10 XP).

  • Reveal solution

    Scores 0 XP and unlocks only after 3 check runs.

  • Attempt cap

    60 check runs per learner. The runner warns you in the last 10.

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  • Walkthrough

    Always free and never penalised: use it before spending a hint.