网络心跳配置

aerospike的心跳协议负责维护集群的完整性。有两种方式心跳模式

Multicast (UDP)
Mesh (TCP)

多播 Multicast Heartbeat

我们建议使用多播心跳协议时可用。由于各种原因,你的网络可能不支持多播。请查看我们的故障排除指南，以查看如何在您的环境中验证多播信息。

配置步骤

在 heartbeat 段落里面配置：

Set mode to multicast.
Set address to a valid multicast address (239.0.0.0-239.255.255.255).

*(Optional) Set interface-address to the IP of the interface intended for intracluster communication. This setting also controls the interface fabric will use. Needed when isolating intra-cluster traffic to a particular network interface. InterfaceAddress 表示一个由名称和分配给此接口的 IP 地址列表组成的网络接口。它用于标识加入多播组的本地接口。

Set interval and timeout
interval (recommended: 150) controls how often to send a heartbeat packet.
timeout (recommended: 10) controls the number of intervals after which a node is
considered to be missing by rest of nodes in the cluster if they haven't received the heartbeat from missing node.
With the default settings, a node will be aware of another node leaving the cluster within 1.5 seconds.

Example

...
  heartbeat {
    mode multicast                  # Send heartbeats using Multicast
    address 239.1.99.2              # multicast address
    port 9918                       # multicast port
    interface-address 192.168.1.100 # (Optional) (Default any) IP of the NIC to
                                    # use to send out heartbeat and bind
                                    # fabric ports
    interval 150                    # Number of milliseconds between heartbeats
    timeout 10                      # Number of heartbeat intervals to wait
                                    # before timing out a node
  }
...

单播 Mesh (Unicast) Heartbeat

采用TCP点对点连接的心跳。在集群中的每个节点维护一个心跳连接到所有其他节点，导致多播所需的许多连接。基于这个原因，我们建议使用多播心跳协议时可用。

配置步骤

Set mode to mesh.
(Optional) Set address to the IP of the local interface intended for intracluster communication. This setting also controls the interface fabric will use. Needed when isolating intra-cluster traffic to a particular network interface.
Set mesh-seed-address-port to be the IP address and heartbeat port of a node in the cluster.
Set interval and timeout
interval (recommended: 150) controls how often to send a heartbeat packet.
timeout (recommended: 10) controls the number of intervals after which a node is considered to be missing by the rest of the nodes in the cluster if they haven't received the heartbeat from the missing node.
With the recommended settings, a node will be aware of another node leaving the cluster within 1.5 seconds.

...
  heartbeat {
    mode mesh                   # Send heartbeats using Mesh (Unicast) protocol
    address 192.168.1.100       # (Optional) (Default: any) IP of the NIC on
                                # which this node is listening to heartbeat
    port 3002                   # port on which this node is listening to
                                # heartbeat
    mesh-seed-address-port 192.168.1.100 3002 # IP address for seed node in the cluster
                                              # This IP happens to be the local node
    mesh-seed-address-port 192.168.1.101 3002 # IP address for seed node in the cluster
    mesh-seed-address-port 192.168.1.102 3002 # IP address for seed node in the cluster
    mesh-seed-address-port 192.168.1.103 3002 # IP address for seed node in the cluster

    interval 150                # Number of milliseconds between heartbeats
    timeout 10                  # Number of heartbeat intervals to wait before
                                # timing out a node
  }
...