Question

我了解到坐标节点广播搜索请求，并使用“查询然后提取阶段”来收集从数据节点接收的结果。

它是在“查询然后取回阶段”的一次迭代中完成的，还是搜索请求可以进行多次查询然后取回阶段的迭代？

假设接受来自Elastic Search Complex Scenario的复杂过滤器查询（信用：Val，谢谢@Val），它会涉及查询的多次迭代然后获取阶段吗？协调节点采取什么步骤来回答此查询

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Answer 1

有一些提示。如果有好奇心的人将其张贴在这里

https://discuss.elastic.co/t/elastic-search-coordinating-node-role-complex-aggregations/225622/5

The details change as various things are optimised and evolve.
There are a number of "it depends" e.g. the "canMatch" pre-flight phase will not run if there's insufficient numbers of shards being queried or custom search routing is used or DFS is used.
Cross-cluster-search is another consideration.

Here's probably a good place to start if you're curious.

弹性搜索协调节点角色-复杂的聚合

1 个答案: