The cluster configuration feature of Alibaba Cloud Elasticsearch allows you to customize synonym configurations, garbage collector configurations, YML file configurations, and scenario-based configurations. This topic describes how to customize configurations and provides the related limits.

Operation Description Limit
Configure synonyms You can upload a synonym dictionary file that is tailored to your business requirements to your Elasticsearch cluster. After the file is uploaded, the system automatically updates the synonym dictionary of the cluster based on the file. Then, the new synonym dictionary can be used in data searches.
  • The synonym dictionary file must conform to the relevant rules and must be a TXT file.
  • The size of the synonym dictionary file cannot exceed the upper limit. The upper limit is related to the specifications of your cluster. You can view the specifications in the console.
  • The stopword list of your cluster cannot contain the words specified in the synonym dictionary file.
Configure a garbage collector You can switch between CMS and G1 garbage collectors. The version of your Elasticsearch cluster must be V6.7.0 or later, and the memory size of each data node in the cluster must be no less than 32 GiB.
Configure the YML file of a cluster You can configure the Auto Indexing, Index Deletion, Audit Log Indexing, and Watcher features. You can also configure other items, such as cross-origin resource sharing (CORS), a remote reindex whitelist, and queue sizes. The Audit Log Indexing feature is not supported in Elasticsearch V7.0 and later.
Perform scenario-based configuration You can select a scenario based on your business requirements and use the related template to modify the configurations of your cluster. This template helps you achieve optimal cluster and index configurations. Standard Edition clusters support general, data analysis, database acceleration, and search scenarios. Advanced Edition clusters support only logging scenarios.