What is Elastic Resize and how is it different from Concurrency Scaling?
什么是 Elastic Resize，与并发扩展有什么区别？
Elastic Resize adds or removes nodes from a single Redshift cluster within minutes to manage its query throughput. For example, an ETL workload for certain hours in a day or month-end reporting might need additional Amazon Redshift resources to complete on time. Concurrency Scaling adds additional cluster resources to increase the overall query concurrency.
Elastic Resize 几分钟内即可在单个 Redshift 集群中添加或删除节点，以管理其查询吞吐量。例如，一天内某几个小时的 ETL 工作负载或月末报告可能需要额外的 Amazon Redshift 资源才能按时完成。并发扩展会添加额外的集群资源来提高整体查询并发量。