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Cluster Update Settings
editCluster Update Settings
editAllows to update cluster wide specific settings. Settings updated can either be persistent (applied cross restarts) or transient (will not survive a full cluster restart). Here is an example:
curl -XPUT localhost:9200/_cluster/settings -d '{ "persistent" : { "discovery.zen.minimum_master_nodes" : 2 } }'
Or:
curl -XPUT localhost:9200/_cluster/settings -d '{ "transient" : { "discovery.zen.minimum_master_nodes" : 2 } }'
The cluster responds with the settings updated. So the response for the last example will be:
{ "persistent" : {}, "transient" : { "discovery.zen.minimum_master_nodes" : "2" } }'
Cluster wide settings can be returned using:
curl -XGET localhost:9200/_cluster/settings
There is a specific list of settings that can be updated, those include:
Cluster settings
editRouting allocation
editAwareness
editBalanced Shards
editAll these values are relative to one another. The first three are used to compose a three separate weighting functions into one. The cluster is balanced when no allowed action can bring the weights of each node closer together by more then the fourth setting. Actions might not be allowed, for instance, due to forced awareness or allocation filtering.
-
cluster.routing.allocation.balance.shard
-
Defines the weight factor for shards allocated on a node
(float). Defaults to
0.45f
. Raising this raises the tendency to equalize the number of shards across all nodes in the cluster. -
cluster.routing.allocation.balance.index
-
Defines a factor to the number of shards per index allocated
on a specific node (float). Defaults to
0.55f
. Raising this raises the tendency to equalize the number of shards per index across all nodes in the cluster. -
cluster.routing.allocation.balance.primary
-
Defines a weight factor for the number of primaries of a specific index
allocated on a node (float).
0.00f
. Raising this raises the tendency to equalize the number of primary shards across all nodes in the cluster. [1.3.8] Deprecated in 1.3.8. -
cluster.routing.allocation.balance.threshold
-
Minimal optimization value of operations that should be performed (non
negative float). Defaults to
1.0f
. Raising this will cause the cluster to be less aggressive about optimizing the shard balance.
Concurrent Rebalance
edit-
cluster.routing.allocation.cluster_concurrent_rebalance
-
Allow to control how many concurrent rebalancing of shards are
allowed cluster wide, and default it to
2
(integer).-1
for unlimited. See also Cluster.
Disable allocation
editAll the disable allocation settings have been deprecated in favour for
cluster.routing.allocation.enable
setting.
Enable allocation
edit-
cluster.routing.allocation.enable
- See Cluster.
Throttling allocation
editFilter allocation
editcluster.routing.allocation.require.*
See Cluster.
Metadata
edit-
cluster.blocks.read_only
- Have the whole cluster read only (indices do not accept write operations), metadata is not allowed to be modified (create or delete indices).
Discovery
edit-
discovery.zen.minimum_master_nodes
- See Zen Discovery
-
discovery.zen.publish_timeout
- See Zen Discovery
Threadpools
edit-
threadpool.*
- See Thread Pool
Index settings
editIndex filter cache
editTTL interval
edit-
indices.ttl.interval
(time) -
See
_ttl
Recovery
editStore level throttling
editLogger
editLogger values can also be updated by setting logger.
prefix. More
settings will be allowed to be updated.
Field data circuit breaker
edit-
indices.breaker.fielddata.limit
- See Field data
-
indices.breaker.fielddata.overhead
- See Field data