elasticsearch

# SHOW INDEX INFO
curl -XGET localhost:9200/_cat/indices?pretty 

# LIST ALL INDEXES
curl 'localhost:9200/_cat/indices?v'

# SHOW CLUSTER LOAD
curl -XGET localhost:9200/_cat/nodes?v 

# CLUSTER STATUS
curl -XGET localhost:9200/_cluster/health?pretty

# SHOW PROCESSES LIST
curl -XGET 'localhost:9200/_tasks?pretty'

# SHOW PENDING TASKS
curl -XGET 'http://localhost:9200/_cluster/pending_tasks' | jq

# SHOW UNASSIGNED SHARDS
curl -XGET localhost:9200/_cat/shards?h=index,shard,prirep,state,unassigned.reason| grep UNASSIGNED

# ALLOCATE SHARDS
curl -X POST http://localhost:9200/_cluster/reroute?retry_failed=true -d '
{
    "commands" : [
        {
          "allocate_replica" : {
                "index" : "test333", "shard" : 2,
                "node" : "alex1"
          }
        }
    ]
}
'

# UPDATE REPLICA FOR ALL
curl -XPUT 'localhost:9200/_settings' -d '
    {
        "index" : {
            "number_of_replicas" : 2
        }
    }'

# UPDATE REPLICA FOR INDEX
curl -XPUT 'localhost:9200/index_name/_settings' -d '
    {
        "index" : {
            "number_of_replicas" : 2
        }
    }'

# DUMP
elasticdump --input=http://localhost:9200/my_index --output=my_index.json --type=data
elasticdump --input=http://localhost:9200/my_index --output=my_index_mapping.json --type=mapping

# COPY REMOTE
elasticdump --input=http://server001:9200/promo_index_v1 --output=http://server002:9200/promo_index_v1 --type=mapping
elasticdump --input=http://server001:9200/promo_index_v1 --output=http://server002:9200/promo_index_v1 --type=data

curl -XPUT 'localhost:9200/*/_settings' -H 'Content-Type: application/json' -d '{
 "index.indexing.slowlog.threshold.index.warn": "20s",
 "index.indexing.slowlog.threshold.index.info": "15s",
 "index.indexing.slowlog.threshold.index.debug": "10s",
 "index.indexing.slowlog.threshold.index.trace": "5s",
 "index.indexing.slowlog.level": "trace",
 "index.indexing.slowlog.source": "1000"
}'

curl -XPUT 'localhost:9200/*/_settings' -H 'Content-Type: application/json' -d '{
"index.search.slowlog.threshold.query.warn": "20s",
"index.search.slowlog.threshold.query.info": "15s",
"index.search.slowlog.threshold.query.debug": "10s",
"index.search.slowlog.threshold.query.trace": "5s",
"index.search.slowlog.threshold.fetch.warn": "20s",
"index.search.slowlog.threshold.fetch.info": "15s",
"index.search.slowlog.threshold.fetch.debug": "10s",
"index.search.slowlog.threshold.fetch.trace": "5s"
}'

# Increasing the number of replicas does not change the capacity of the index.