[[index-modules-allocation]] == Index Shard Allocation This module provides per-index settings to control the allocation of shards to nodes: * <<shard-allocation-filtering,Shard allocation filtering>>: Controlling which shards are allocated to which nodes. * <<delayed-allocation,Delayed allocation>>: Delaying allocation of unassigned shards caused by a node leaving. * <<allocation-total-shards,Total shards per node>>: A hard limit on the number of shards from the same index per node. include::allocation/filtering.asciidoc[] include::allocation/delayed.asciidoc[] include::allocation/prioritization.asciidoc[] include::allocation/total_shards.asciidoc[]