What is “reindexing” in Elasticsearch?
a) Modifying the mapping of an existing index
b) Copying documents from one index to another
c) Caching query results for faster retrieval
d) Backing up an index to a different node
Answer:
b) Copying documents from one index to another
Explanation:
Reindexing in Elasticsearch refers to the process of copying documents from one index to another, often used when updating mappings or restructuring data.