問題文
During a design review, an architect asks where Oracle RAC keeps the record of which instance currently holds which data block and which enqueue. A junior DBA answers that a single node owns that record for the whole cluster. Which statement corrects the answer?
選択肢
- The Global Resource Directory is spread across every active instance, and the Global Cache Service and the Global Enqueue Service maintain the entries in it.
- The Global Resource Directory is stored in the shared control file, and the checkpoint process on each instance maintains the entries in it.
- The Global Resource Directory is stored in the Oracle Cluster Registry, and the Cluster Ready Services daemon maintains the entries in it.
- The Global Resource Directory is held by the instance that mounted the database first, and the instance enqueue process on that node maintains the entries in it.