DSE Solr 节点和 vnode [英] DSE Solr nodes and vnodes
问题描述
以下文档页面说不建议将 vnodes 用于 Solr/Hadoop 节点:
The following documentation pages say that it is not recommended to use vnodes for Solr/Hadoop nodes:
http://www.datastax.com/documentation/datastax_enterprise/4.0/datastax_enterprise/srch/srchIntro.htmlhttp://www.datastax.com/documentation/datastax_enterprise/4.0/datastax_enterprise/deploy/deployConfigRep.html#configReplication
为这些节点类型使用 vnode 的确切问题是什么?我继承了 DSE 设置,其中搜索节点都使用 vnode,我想知道是否应该关闭集群并禁用 vnode.在这种情况下启用 vnode 有什么坏处吗?
What is the exact problem with using vnodes for these node types? I inherited a DSE setup wherein the Search nodes all use vnodes, and I wonder if I should take down the cluster and disable vnodes. Is there any harm in leaving vnodes enabled in such a case?
推荐答案
这主要是 DSE/Search 的性能问题,因为查询需要在内部扇出到足够多的节点(或 vnodes)以覆盖所有 Cassandra 行在 DC 中,启用 vnode 时会出现更多子查询.
It is primarily a performance concern with DSE/Search since a query needs to fan out internally to enough nodes (or vnodes) to cover the full range of Cassandra rows in the DC, that's a lot more sub-queries when vnodes are enabled.
但是,如果您在 DSE/搜索 DC 中使用虚拟节点的性能可以接受,那么您就无需担心.
But, if your performance with vnodes in a DSE/Search DC is acceptable, then you have nothing to worry about.
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