フリー問題

問題文

A production container holds 40 million vectors with a flat index. The team now needs DiskANN for better latency. What must the plan account for?

選択肢

1. The index type can be changed online while queries continue to be served by the old index, so the only thing to plan for is the additional request units consumed during the build
2. The consistency level must be switched to eventual before the rebuild, because the index build cannot proceed while reads are served from multiple replicas
3. The container must be recreated and the data reimported, because the index type is part of the container's immutable definition and cannot be altered after creation
4. The existing index must be dropped and recreated, so the plan must cover the period during which the replacement index is being built over 40 million vectors