Shrink an ElasticSearch Index

es_shrink.txt

PUT /XXXXX/_settings
{
  "settings": {
    "index.blocks.write": true
  }
}

POST /XXXXX/_split/XXXXX_split
{
  "settings": {
    "index.number_of_shards": 2,
    "index.number_of_replicas": 0
  }
}

POST /XXXXX_split/_shrink/XXXXX_shrunk
{
  "settings": {
    "index.number_of_shards": 1,
    "index.number_of_replicas": 0,
    "index.codec": "best_compression" 
  }
}

POST /XXXXX_shrunk/_forcemerge

DELETE /XXXXX
DELETE /XXXXX_split

POST /_reindex
{
  "source": {
    "index": "XXXXX_shrunk"
  },
  "dest": {
    "index": "XXXXX"
  }
}

PUT /XXXXX/_settings
{
  "settings": {
    "index.number_of_replicas": 0
  }
}

DELETE /XXXXX_shrunk

PUT /XXXXX/_settings
{
  "settings": {
    "index.routing.allocation.require._name": null,
    "index.blocks.write": null
  }
}