• For some upgrades with migrations, we will need to either:
  1. take the system down (no writes, no reads)
  2. use a read-replica while (no writes, but reads allowed)
• We need to see what the user experience is for a read-replica:
  • On download, will we loose ability to track that download during this time?
  • Will user see errors on download due to attempted log write?
  • We may need to turn on read-only mode during the duplication of the database, we need to see how long we expect the system to be in this state

This is necessary data to look at the pros/cons of the 2 approaches