Cluster Update Settings APIedit
The Cluster Update Settings API allows to update cluster wide settings.
Cluster Update Settings Requestedit
A ClusterUpdateSettingsRequest
:
ClusterUpdateSettingsRequest request = new ClusterUpdateSettingsRequest();
Cluster Settingsedit
At least one setting to be updated must be provided:
Providing the Settingsedit
The settings to be applied can be provided in different ways:
String transientSettingKey = RecoverySettings.INDICES_RECOVERY_MAX_BYTES_PER_SEC_SETTING.getKey(); int transientSettingValue = 10; Settings transientSettings = Settings.builder() .put(transientSettingKey, transientSettingValue, ByteSizeUnit.BYTES) .build(); String persistentSettingKey = EnableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING.getKey(); String persistentSettingValue = EnableAllocationDecider.Allocation.NONE.name(); Settings persistentSettings = Settings.builder() .put(persistentSettingKey, persistentSettingValue) .build();
Settings.Builder transientSettingsBuilder = Settings.builder() .put(transientSettingKey, transientSettingValue, ByteSizeUnit.BYTES); request.transientSettings(transientSettingsBuilder);
request.transientSettings( "{\"indices.recovery.max_bytes_per_sec\": \"10b\"}" , XContentType.JSON);
Optional Argumentsedit
The following arguments can optionally be provided:
Timeout to wait for the all the nodes to acknowledge the settings were applied
as a |
|
Timeout to wait for the all the nodes to acknowledge the settings were applied
as a |
Synchronous Executionedit
When executing a ClusterUpdateSettingsRequest
in the following manner, the client waits
for the ClusterUpdateSettingsResponse
to be returned before continuing with code execution:
ClusterUpdateSettingsResponse response = client.cluster().putSettings(request, RequestOptions.DEFAULT);
Asynchronous Executionedit
Executing a ClusterUpdateSettingsRequest
can also be done in an asynchronous fashion so that
the client can return directly. Users need to specify how the response or
potential failures will be handled by passing the request and a listener to the
asynchronous put-settings method:
The |
The asynchronous method does not block and returns immediately. Once it is
completed the ActionListener
is called back using the onResponse
method
if the execution successfully completed or using the onFailure
method if
it failed.
A typical listener for put-settings
looks like:
Cluster Update Settings Responseedit
The returned ClusterUpdateSettingsResponse
allows to retrieve information about the
executed operation as follows: