Datadog Log Management Fundamentals free question 2 / 10 · Domain 1: Logging Fundamentals
In one index you set the Standard Tier retention to 3 days and the Flex Tier retention to 90 days. How does the Flex Logs documentation describe the way the logs in that index are stored?
- They stay in the Standard Tier for 3 days, then in the Flex Tier for the remaining 87 days
- They stay in the Standard Tier for 3 days and then in the Flex Tier for another 90 days
- They are written to both tiers at the same time, and the Standard Tier copy is deleted after 3 days
- They stay in the Flex Tier for the first 87 days and in the Standard Tier for the last 3 days
Show the answer and explanation
Answer: A
Why this is correct
A note in "Configure storage tiers" says that if both tiers are selected, logs are stored in the Standard Tier until the end of the configured retention period, before they are stored in the Flex Tier. Its example is exactly this setting: with the Standard Tier at 3 days and the Flex Tier at 90 days, logs in that index are first stored in the Standard Tier for 3 days and then stored in the Flex Tier for the remaining 87 days. The Flex Tier value is the total retention.
Why the other options are wrong
"They stay in the Standard Tier for 3 days and then in the Flex Tier for another 90 days" … The 90 days set for the Flex Tier is the total retention, and it includes the first 3 days. The example in the documentation does not add 90 days after the first 3.
"They are written to both tiers at the same time, and the Standard Tier copy is deleted after 3 days" … The note describes logs passing from one tier to the other in sequence. It does not describe writing the same logs to both tiers at once.
"They stay in the Flex Tier for the first 87 days and in the Standard Tier for the last 3 days" … This reverses the order. Logs are stored in the Standard Tier first and are stored in the Flex Tier after the Standard Tier retention period ends.
Design tip
This layout suits application logs that you want to query quickly for the first few days and then keep for a long time. The documentation calls retaining logs in Standard Indexing first and then extending them using Flex Logs a perfect solution for application logs that you need to retain for longer.