An online educational institute uses a three-tier web application & is using AWS X-Ray to trace data between various services. User A is experiencing latency issues using this application & the Operations team has asked you to gather all traces for User A. Which of the following needs to be enabled to get Filtered output for User A from all other traces?

Answer options:

A.Trace ID
B.Annotations
C.Segment ID
D.Tracing header

Correct Answer – B
Annotations are key-value pairs indexed to use with filter expressions. In the above case, traces for a user A needs to be tracked, for which Annotations can be used along with a Filter expression to find all traces related to that user.
Option A is incorrect as Trace ID will track a request`s path through the application & will not be used in filtering messages.
Option C is incorrect as Segment will provide details of resource name, request & work done. It will not help in filtering messages.
Option D is incorrect as the Tracing Header consists of Root trace ID, Segment ID & sampling decision. It is not useful for filtering messages.
For more information on Annotations & Filter expressions on AWS X-Ray, refer to the following URL-
https://docs.aws.amazon.com/xray/latest/devguide/xray-concepts.html