Exam Professional Cloud DevOps Engineer topic 1 question 65 discussion

C, https://sre.google/sre-book/service-level-objectives/ "Don’t pick a target based on current performance"

Picking an SLO based upon current performance can commit you to unnecessarily strict SLOs. Select slightly lower SLO. Will go wtih C

option B, why setting lower SLO !

Option C

https://www.exam-answer.com/slos-for-high-traffic-web-application

pick the SLO a bit higher then the current value would be better

C is correct answer according to https://sre.google/workbook/implementing-slos/#using-the-slis-to-calculate-starter-slos "Using the SLIs to Calculate Starter SLOs We can round down these SLIs to manageable numbers (e.g., two significant figures of availability, or up to 50 ms5 of latency) to obtain our starting SLOs."

from SRE book: start from a loosen SLO that u can tighten better than to choose an overly strict SLO that has to be relax after u discover it is unattainable.https://sre.google/sre-book/service-level-objectives/

going with B)

going with B)

Historical trend dictates customers are happy at the current performance level.

According to this material, if the users are happy with the current not that stellar performance, the SLOs should be achievable, based on the historical values: https://cloud.google.com/blog/products/management-tools/practical-guide-to-setting-slos "It’s important to set a target that is achievable so that alerts are meaningful. Normally, when choosing an SLO, it’s best to start from historical trends and assume if enough people are happy with the service now, you’re probably doing OK. Eventually, it’s ideal to converge those numbers with aspirational targets that your business may want you to meet." Even though the SRE book says to avoid picking target based on the current performance https://sre.google/sre-book/service-level-objectives/ , this is in a particular context: extremely stable and high performing apps with high cost.

C is the answer.

Agree with C

SLI != SLO

C is correct

Agree with answer C