HANA employs an in-memory, data source agnostic computing engine, where data to be processed is held in RAM instead of reading from secondary storage devices thus providing a performance boost.
HANA应用了常驻内存、数据源无关的计算引擎，要处理的数据存放在RAM中，而不是从二级存储设备中获取，这样提供了性能的提升。
In the failover process, the data source is moved from the primary to the secondary system.
在故障转移过程中，数据源从主系统移动到辅助系统。
The primary and secondary RAC nodes are specified positionally in the data source URL.
rac主节点和辅助节点将在数据源url中按位置指定。
Safe, reliable, read-only do not write in the recovery process will not cause secondary damage to the source data.
安全可靠，恢复过程中只读不写，不会对源数据造成二次破坏。
Safe, reliable, read-only do not write in the recovery process will not cause secondary damage to the source data.
安全可靠，恢复过程中只读不写，不会对源数据造成二次破坏。
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