You are developing a backup strategy to support the information system contingency plan (ISCP) that must meet the recovery time objective (RTO) and recovery point objective (RPO) determined in the business continuity plan (BCP). The full backup is scheduled at midnight on Sundays. It takes 7 hours to restore the full backup, differential or incremental backup would be restored afterward. If the RTO is 24 hours and RPO is 1 day. Which of the following is the best decision in terms of backup efficiency?
A. Perform a full backup on Sunday and incremental backups on weekdays.
B. Perform a full copy backup on Sunday and incremental backups on weekdays.
C. Perform an incremental backup every one hour
D. Call a meeting to review the objectives
Kindly be reminded that the suggested answer is for your reference only. It doesn’t matter whether you have the right or wrong answer. What really matters is your reasoning process and justifications.
My suggested answer is D. Call a meeting to review the objectives.
It is a correct but ineffective backup schedule to perform a full backup on Sunday and incremental backups on weekdays because the missing Saturday results in a gap of two days (Friday to Sunday) that cannot meet the requirement of 1-day RPO.
It is an incorrect backup configuration to perform a full copy backup on Sunday and incremental backups on weekdays because of the copy-only backup will not update the archive bit used to support incremental backup.
To perform an incremental backup every one hour without a full backup as the baseline is an incorrect backup configuration and not working properly.
It doesn’t necessarily need to call a meeting to review the objectives, but this is the only feasible option after all other options are ruled out.
您正在發展備份策略來支持資訊系統應變計畫（ISCP），該計畫必須滿足業務連續性計畫（BCP）中規定的復原時間目標（RTO）和復原資料點目標（RPO）。 完整備份計畫在星期日的午夜進行。 恢復完整備份需要7個小時，之後將恢復差異備份或增量備份。 如果RTO為24小時，RPO為1天。 從備份效率的觀點來看, 以下哪項是最有效的決定？
B. 在星期日執行完整副本備份(copy backup)，在工作日執行增量備份。