This is a good question to test our understanding of database replication. I think the key is to find a way to directly compare the state of the database between the Leader and Follower. Comparing the pgcurrentxlog_location seems like the most reliable approach.
I'm a bit confused by this question. Validating the container ID against the Leader's info endpoint seems like it might not be the most reliable way to confirm the database copy. I'll need to double-check the other options to see what makes the most sense.
Okay, let's see. I think comparing the pgcurrentxlog_location between the Leader and Follower is the most straightforward approach here. That should give me a clear indication of whether the Follower is up-to-date.
Hmm, this looks like a tricky one. I'll need to carefully read through the options and think about the different ways to confirm the Follower has a current copy of the database.
This is a good one. I'm going to make sure I understand the relationship between the Leader and Follower, and then I'll systematically go through the options to find the best approach.
Okay, I think I've got this. The key is to compare the pgcurrentxlog_location between the Leader and the Follower. That should give me the confirmation I need.
This looks like a tricky question. I'll need to carefully review the options and think through the best way to confirm the Follower has a current copy of the database.
I'd have to go with Option B. Counting the components in pgstartreplication and comparing to the total Followers sounds like a good way to validate the setup.
Option D is a bit convoluted. Retrieving credentials from a test app and comparing them seems like an unnecessary extra step when simpler options are available.
I'm leaning towards Option C. Validating the Follower container ID against the Leader's info endpoint would provide a good cross-check on the Follower's identity.
Option A seems the most straightforward way to confirm the Follower's copy of the database. Comparing the log location between the Leader and Follower is a reliable method.
Option A seems the most straightforward way to confirm the Follower's copy of the database. Comparing the log location between the Leader and Follower is a reliable method.
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