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ShrinkIndex.md

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Shrink Index

  • Number of shards cannot be changed after index has been created, but
  • New in version 5.x - index can be shrunk to smaller number of shards
  • Index must be in good health and in read-only state, can be achieved with following request:
PUT /index-name/_settings
{
  "settings": {
    "index.routing.allocation.require._name": "new-node-name", 
    "index.blocks.write": true 
  }
}
  • Shrink Index is a single RESTful command:
POST source-index/_shrink/target-index