Which HA solution involves multiple systems all of which are online and actively processing traffic or data?
A.
Active-active cluster
B.
Active-passive cluster
C.
Database shadowing
D.
Remote journaling
Explanation:
Answer A is correct; an active-active cluster involves multiple systems all of which are online and actively processing traffic or data. This configuration is also commonly referred to as load balancing, and is especially common with public facing systems such as Web server farms.Incorrect Answers and Explanations: B, C, and D: Answers B, C, and D are incorrect. An active-passive involves devices or systems that are already in place, configured, powered on and ready to begin processing network traffic should a failure occur on the primary system. Database shadowing uses two or more identical databases which are updated simultaneously. Remote journaling saves the database checkpoints and database journal to a remote site. In the event of failure at the primary site, the database may be recovered.
An active-active cluster involves multiple systems all of which are online and actively processing traffic or data. This configuration is also commonly referred to as load balancing, and is especially common with public facing systems such as Web server farms. 主動 – 主動集群涉及多個系統，所有這一切都是在網上，並積極處理流量或數據。這種構造通常也稱為負載平衡，並且是特別常見的與面向公眾的系統，諸如Web服務器農場。
An active-passive involves devices or systems that are already in place, configured, powered on and ready to begin processing network traffic should a failure occur on the primary system. 主動 – 被動涉及到已經到位，設備或系統，配置，動力上，並準備開始處理網絡流量在發生故障時的主系統上。
Database shadowing uses two or more identical databases which are updated simultaneously. 數據庫遮蔽使用被同時更新兩個或多個相同的數據庫。
Remote journaling saves the database checkpoints and database journal to a remote site. In the event of failure at the primary site, the database may be recovered.
遠程日誌保存數據庫檢查點和數據庫日誌到遠程站點。在出現故障的主站點的情況下，數據庫可以恢復。
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