远程搜索服务器是一个单点故障点。
存储层：实现存储双活，存储系统无单点故障点。
Storage layer: to achieve dual storage, storage system without a single point of failure.
因此KDC数据库绝对不能泄漏，否则它就会成为一个单点故障，这一点非常重要。
This makes it very important that the KDC database is not compromised because otherwise it becomes a single point of failure.
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