Index lifecycle management (ILM) automates index operations such as rollover, retention, and deletion in Alibaba Cloud Elasticsearch.
ILM phases
ILM defines the following index phases:
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Hot: Handles newly indexed data. Hot nodes are fast, high-performance, and resource-intensive.
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Warm: Stores aging data that is queried less frequently. Warm nodes are optimized for storage capacity and cost-effectiveness.
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Cold: Holds rarely accessed data on low-cost, slow storage.
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Delete: Data is automatically removed after its retention period.
An index lifecycle policy defines the actions to perform in each phase and when to transition indices between phases.
ILM actions
See Index lifecycle in Elasticsearch documentation.