This is the ES .yml file for a master node in our 6 node ES cluster. We have three master & data nodes, and 3 data nodes. Each node has 12 1 TB disks, mounted at /srv/es/{0..B}. We put the ES work directory on the first disk. This is currently used by ES 1.5.x running under RHEL 7.2.

elasticsearch.patriots.yml

cluster.name: elasticsearch.patriots

action.disable_delete_all_indices: true

bootstrap.mlockall: true

node.name: "brady"
node.master: true
node.data: true

index.number_of_shards: 1
index.number_of_replicas: 1
index.load_fixed_bitset_filters_eagerly: false

path.conf: /etc/elasticsearch
path.data: /srv/es/0,/srv/es/1,/srv/es/2,/srv/es/3,/srv/es/4,/srv/es/5,/srv/es/6,/srv/es/7,/srv/es/8,/srv/es/9,/srv/es/A,/srv/es/B
path.work: /srv/es/0/es.tmp.d
path.logs: /var/log/elasticsearch

transport.host: 172.17.40.3
http.bind_host: [ 172.18.40.3, 127.0.0.1 ]
http.publish_host: 172.18.40.3
http.port: 9200

gateway.recover_after_nodes: 4
gateway.expected_nodes: 6
gateway.recover_after_time: 10m

discovery.zen.minimum_master_nodes: 2
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: ["172.17.40.3", "172.17.40.5", "172.17.40.7"]

cluster.routing.allocation.node_concurrent_recoveries: 12
cluster.routing.allocation.node_initial_primaries_recoveries: 4

indices.recovery.max_bytes_per_sec: 100mb
indices.recovery.concurrent_streams: 12
indices.breaker.fielddata.limit: 75%
indices.fielddata.cache.expire: 1w
indices.fielddata.cache.size: 60%
indices.store.throttle.max_bytes_per_sec: 150mb

http.cors.enabled: true