# AOSSUS03-BP01 Use Index State Management to manage the lifecycle of your dataset
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 Improve data management, meet compliance requirements, and reduce data loss risk by using Index State Management (ISM) to manage the lifecycle of your dataset. 

 **Level of risk exposed if this best practice is not established:** Medium 

 **Desired outcome:** The lifecycle of the dataset is managed using Index State Management (ISM) to support sustainability goals. 

 **Benefits of establishing this best practice:** 
+  Improved data management and organization 
+  Enhanced ability to meet data compliance and regulatory requirements 
+  Reduced risk of data loss or corruption due to proper data lifecycle management 

## Implementation guidance
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 ISM removes the necessity for establishing and overseeing external processes to run your index operations. It also allows you to perform operations like moving data from Hot storage to Warm. 
+  Implement a data classification policy to understand its criticality to business outcomes and choose the right energy-efficient storage tier. Determine criticality, confidentiality, integrity, and availability of data based on risk to the organization. 
+  Evaluate your data characteristics and access pattern to collect the key characteristics of your storage needs. Key characteristics to consider include: 
  +  **Data type:** Structured, semistructured, unstructured 
  +  **Data growth:** Bounded, unbounded 
  +  **Data durability:** Persistent, ephemeral, transient 
  +  **Access patterns:** Reads or writes, frequency, spiky, or consistent 
+  Implement an [ISM policy](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/ism.html) to move data between different storage tiers to meet business and regulatory requirements. Additionally, implement an [ISM policy](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/ism.html) to delete unnecessary data. For detailed implementation guidance, see [AOSOPS01-BP01](aosops01-bp01.md). 

## Resources
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+  [Index State Management in Amazon OpenSearch Service](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/ism.html)