查询功能是产品的一个便捷特性，但它不受高端数据库中所有高级查询优化器的支持。
The query functionality is a valid convenience feature of the product, but it is not backed by all the sophisticated query optimizers found in top-end databases.
其理论在于，以数据的商业价值为依据，制定存储分配和发布策略，从而能够减少昂贵的高端存储设备的数量，这样也就缩减了成本。
By devising a strategy for storage allocation and distribution based on the business value of data, the theory went, we could reduce quantities of expensive high-end storage and thereby shrink costs.
这类应用的特点是存在大量活跃堆数据和线程级别的并发，并且往往运行在高端多核处理器上。
These sorts of applications are characterized by large amounts of live heap data and considerable thread-level parallelism, and are often run on high-end multi-core processors.
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