com.fasterxml.clustermate.service.cfg.RemoteClusterConfig Maven / Gradle / Ivy
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package com.fasterxml.clustermate.service.cfg;
import javax.validation.Valid;
import javax.validation.constraints.*;
/**
* Configuration settings for one of optional "remote" clusters; remote
* clusters are clusters with which local cluster exchanges data, and
* the typical use case is to allow Data Center replication for
* Disaster Recovery (DR) or failover, or for providing read-only replicas.
*
* Note that key ranges of all clusters must match; otherwise content
* exchange will not work. Because of this, configuration here is much
* more compact than that of {@link ClusterConfig}; in fact, only one
* or more seed nodes are needed.
*/
public class RemoteClusterConfig
{
/**
* Setting that determines level of redundancy to use for pulling content
* from remote cluster(s): between values of 1 and local custer size
* (that is, {@link ClusterConfig#numberOfCopies}). Special value
* of -1 may be used to mean "use same value as local 'numberOfCopies'".
* Choice here is between reliable replication (higher value) and minimal
* transfer rates (lowest, that is, 1).
* Value itself is used similar to how local node allocation goes, but just
* for calculating shared key range portion to request from matching remote
* node.
*/
@Min(-1)
public int copiesToFetch;
// // Static configuration of cluster nodes; either complete or partial
// // since this is only used for boostrapping and actual remote cluster
// // topology is dynamically requested.
// not mandatory, but if defined, must be valid
// also: if defined, must have at least 1 entry
@Valid
@Size(min=1, max=Integer.MAX_VALUE)
public NodeConfig[] nodes;
}