RDQL允许简明地表达复杂的查询，查询引擎执行访问数据模型的繁重工作。
RDQL allows complex queries to be expressed concisely, with a query engine performing the hard work of accessing the data model.
它允许用户执行快速关键字查询，查找匹配给定查询的文档。
It lets users perform fast keyword look-ups and finds the documents that match a given query.
除了主机服务器上的调度器外，snippet处理器也具有自己的智能抢占式调度器，允许同时执行来自多个查询的snippet。
In addition to the scheduler on the host servers, the snippet processors have their own smart preemptive scheduler that allows snippets from multiple queries to execute simultaneously.
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