Elasticsearch - Dynamic Nodes
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Shard (re)allocation using a standard installation of Elasticsearch, as well as a couple of advanced examples.
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Elasticsearch - Dynamic Nodes
- 1. Elasticsearch - Dynamic Nodes Shard (re)allocation using a standard installation Scott Davis
- 2. Using default elasticsearch.yml Node-1 Node-2 0 1 2 3 4 0 1 2 3 Node-3 4 Node-4 Node-5 elasticsearch cluster index.number_of_shards: 5 index.number_of_replicas: 1 http.port: 9200 transport.tcp.port: 9300 discovery.zen.ping.multicast.enabled: true
- 3. “Sane” defaults • Provide quick and easy ramp up • Leverage hardware changes over time • Either on-prem or cloud (EC2)
- 5. Using custom es_allocation.yml Node-1 Node-2 node.group=replica node.group=replica 1 2 4 5 Node-5 0 node.group=primary 1 node.group=replica 3 Node-4 0 Node-3 node.group=primary 2 3 4 5 elasticsearch cluster index.number_of_shards: 6 index.number_of_replicas: 1 cluster.routing.allocation.awareness.attributes: group
- 6. Default node types # Allow this node to be eligible as a master node (enabled by default): # # node.master: true # # Allow this node to store data (enabled by default): # # node.data: true
- 7. Additional node types # 1. You want this node to never become a master node, only to hold data. # This will be the "workhorse" of your cluster. # # node.master: false # node.data: true # # 2. You want this node to only serve as a master: to not store any data and # to have free resources. This will be the "coordinator" of your cluster. # # node.master: true # node.data: false # # 3. You want this node to be neither master nor data node, but # to act as a "search load balancer" (fetching data from nodes, # aggregating results, etc.) # # node.master: false # node.data: false
- 8. Using custom es_allocation_adv.yml SLB-2 SLB-1 Node-1 Node-2 node.group=replica node.group=replica 1 2 4 5 Node-5 node.group=primary 1 node.group=replica 3 Node-4 0 Node-3 node.group=primary 2 3 4 5 elasticsearch cluster Master-2 Master-1 node. SLB Node-[1-5] Master master No No Yes data No Yes No 0
- 9. Additional info • cluster.routing.allocation.* • index.routing.allocation.* • cluster reroute http://www.elasticsearch.org/guide/en/elasticsearc h/reference/current/index.html http://www.elasticsearch.org/videos/scalingmassive-elasticsearch-clusters/