フリー問題

問題文

Two clusters are linked with disaster recovery replication. What can the secondary cluster do for clients while the primary is healthy?

選択肢

1. Serve requests for tokens that were issued on the secondary itself, because the secondary tracks its own tokens separately from the primary.
2. Nothing, because the disaster recovery secondary does not handle client requests; it mirrors the primary so that it can be promoted if the primary is lost. This is a commercial edition capability.
3. Serve requests for locally-mounted engines only, because a local mount is not part of what the primary replicates and the secondary therefore owns it outright.
4. Serve read requests, because the disaster recovery secondary keeps a full copy of the data and reads do not modify anything.