When should I consider using RA3 instances?
何时应考虑使用 RA3 实例？
Consider choosing RA3 node types in these cases: You need the flexibility to scale and pay for compute separate from storage. You query a fraction of your total data. Your data volume is growing rapidly or is expected to grow rapidly. You want the flexibility to size the cluster based only on your performance needs. As the scale of data continues to grow, reaching petabytes, the amount of data you ingest into your Amazon Redshift data warehouse is also growing. You might be looking for ways to cost-effectively analyze all your data. With new Amazon Redshift RA3 instances with managed storage, you can choose the number of nodes based on your performance requirements, and pay only for the managed storage that you use. This gives you the flexibility to size your RA3 cluster based on the amount of data you process daily without increasing your storage costs. Built on the AWS Nitro System, RA3 instances with managed storage use high performance SSDs for your hot data and Amazon S3 for your cold data, providing ease of use, cost-effective storage, and fast query performance.
在以下情况下，考虑选择 RA3 节点类型：
您需要灵活扩展并为独立于存储的计算付费。
您查询的是总数据的一部分。
您的数据量正在快速增长或预计将快速增长。
您希望仅根据您的性能需求灵活地调整集群的大小。
随着数据规模的持续增长（达到 PB 级），您在 Amazon Redshift 数据仓库中摄取的数据量也在增长。您可能正在寻找经济高效的方法来分析所有数据。
使用带有托管存储的新 Amazon Redshift RA3 实例，您可以基于您的性能需求选择节点数量，并且只需为您实际使用的托管存储付费。这样，您就可以基于您每天处理的数据量灵活调整 RA3 集群的大小，而不会增加您的存储成本。基于 AWS Nitro System，具有托管存储的 RA3 实例对热数据使用高性能 SSD，对冷数据使用 Amazon S3，提供易用性、经济高效的存储和快速查询性能。