com.hazelcast.spi.partitiongroup.PartitionGroupMetaData Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.spi.partitiongroup;
/**
* This class contains the definition of known Discovery SPI metadata to support automatic
* generation of zone aware and node aware backup strategies.
*
* Zone aware backup strategies are based on cloud or service discovery provided information.
* A zone is the term used to refer low-latency link between (virtual) data centers in the same area.
*
* Node aware backup strategy is based on name of the node which is provided by container orchestration tool.
* like Kubernetes, Docker Swarm and ECS. A node is the term used to refer machine that containers/pods run on.
* A node may be a virtual or physical machine.
*
* Placement aware backup strategy is based on the placement strategies of the virtual machines on
* which Hazelcast members run. Unlike zone aware, this strategy can group members within a single
* availability zone based on their racks, power sources, network, etc.
*/
public enum PartitionGroupMetaData {
;
/**
* Metadata key definition for a low-latency link between (virtual) data centers in the same area
*/
public static final String PARTITION_GROUP_ZONE = "hazelcast.partition.group.zone";
/**
* Metadata key definition for a node machine that containers/pods run on,
* in case of container orchestration tools being used.
*/
public static final String PARTITION_GROUP_NODE = "hazelcast.partition.group.node";
/**
* Metadata key definition for the placement group to which VMs belong if a placement strategy is
* applied by cloud providers.
*/
public static final String PARTITION_GROUP_PLACEMENT = "hazelcast.partition.group.placement";
}