Alias strategies

Alias strategies manage Elasticsearch aliases after indexing is complete. They enable zero-downtime index swapping and search routing.

IAliasStrategy

		public interface IAliasStrategy
{
    Task<bool> ApplyAliasesAsync(AliasContext context, CancellationToken ctx = default);
    bool ApplyAliases(AliasContext context);
}
		
	

Built-in strategies

NoAliasStrategy

No-op. Does not create or modify any aliases. This is the default for data streams and wired streams.

LatestAndSearchAliasStrategy

Creates two aliases:

A latest alias pointing to the most recently created index
A search alias pointing to all indices matching the pattern

This enables a pattern where:

Writers always target the latest index
Readers search across all indices via the search alias
Index rotation is transparent to consumers

Auto-selected when the type context has both a ReadAlias (from SearchStrategy) and a WriteTarget (from IndexStrategy).