为数据库服务器提供高可用性包括使硬件本身具有更高的可用性，而不是提供额外的冗余硬件。
Providing high availability for database servers involves making the hardware itself more highly available, rather than providing additional redundant hardware.
原生xml数据库都是以牺牲存储空间并容忍冗余为代价来换取性能的。
Native XML databases are all about sacrificing storage and tolerating redundance in exchange for performance.
对蛋白质结构数据库的冗余数据进行分析研究表明，目前国际数据库中的蛋白质的二级结构存在误差，误差率为25%左右。
The redundancy in the database of protein structure is analyzed, that the protein secondary structure of the international database error is around 25%.
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