记录存储实现确保所有单个的记录存储操作都是原子的、同步的以及序列化的，因此多个访问将不会出现数据毁坏。
Record store implementations ensure that all individual record store operations are atomic, synchronous, and serialized, so no corruption of data will occur with multiple accesses.
通过使用修改记录，只加密（或删除）在上一次同步操作之后修改过的文件。
The itemized changes are used to only encrypt (or delete) files that have changed since the last synchronization.
HADR提供所有被日志记录的DB 2操作的同步复制。
HADR provides for synchronous replication of all logged DB2 operations.
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