Elasticsearch Reindex / migration

ElasticSearch: Zero downtime reindexing
ElasticSearch has a solution to the problem, index aliases. The alias is like a symbolic link which can point to one or more indices. It gives us the flexibility to create a new index in the background and making the changes in a way that is almost unnoticeable to the application.

Reference

• Elasticsearch reindex APIhttps://www.elastic.co/guide/en/elasticsearch/reference/current/docs-reindex.html
• Elasticsearch reindex 1 https://nasa.github.io/cumulus/docs/troubleshooting/reindex-elasticsearch
• reindex status https://nasa.github.io/cumulus-api/#reindex-status
• Elasticsearch reindex explained https://youtu.be/nME4ZjfjwiA
• Elasticsearch reindex needs https://dzone.com/articles/elasticsearch-fault-tolerance-reindexing-need-and-1
• Elasticsearch reindex steps https://www.thirdrocktechkno.com/blog/6-steps-to-reindex-elasticsearch-data/

Elasticsearch

Elasticsearch is the distributed search and analytics engine at the heart of the Elastic Stack.

Reference

• What is Elasticsearch? https://youtu.be/ZP0NmfyfsoM

AWS OpenSearch Deployment Best Practices

• 3 Dedicated Master Nodes

Offload cluster managment task like health checks and maintain routing and cluster state.

• Data Nodes deployed in multiples of 3

Store the data in shards and perform searches, query request, and CRUD operations.

• Deploy across 3AZs

Destribute the data nodes equally across 3 AZs for the hightest availability.

Reference

• ES: https://www.elastic.co/guide/en/elasticsearch/reference/8.5/elasticsearch-intro.html