监控集群

用户可以使用 listReplicaGroups() 监控集群状态。

1. 连接到协调节点：

   $ /opt/sequoiadb/bin/sdb
   > var db = new Sdb( "localhost", 11810 )

2. 集群状态：

   > db.listReplicaGroups()

   输出结果如下：

   {
    "Group": [
      {
        "dbpath": "/opt/sequoiadb/database/cata/11800",
        "HostName": "hostname1",
        "Service": [
          ...
        ],
        "NodeID": 1
      },
      {
        "HostName": "hostname2",
        "dbpath": "/opt/sequoiadb/database/cata/11800",
        "Service": [
          ...
        ],
        "NodeID": 2
      },
      {
        "HostName": "hostname3",
        "dbpath": "/opt/sequoiadb/database/cata/11800",
        "Service": [
          ...
        ],
        "NodeID": 3
      }
    ],
    "GroupID": 1,
    "GroupName": "SYSCatalogGroup",
    "PrimaryNode": 1,
    "Role": 2,
    "Status": 1,
    "Version": 3,
    "_id": {
      "$oid": "558b9264de349a1b87451a1d"
    }
   }
   {
    "Group": [
      {
        "HostName": "hostname1",
        "dbpath": "/opt/sequoiadb/database/data/21100",
        "Service": [
          ...
        ],
        "NodeID": 1000
      },
      {
        "HostName": "hostname2",
        "dbpath": "/opt/sequoiadb/database/data/21100",
        "Service": [
          ...
        ],
        "NodeID": 1001
      },
      {
        "HostName": "hostname3",
        "dbpath": "/opt/sequoiadb/database/data/21100",
        "Service": [
          ...
        ],
        "NodeID": 1002
      }
    ],
    "GroupID": 1000,
    "GroupName": "group1",
    "PrimaryNode": 1001,
    "Role": 0,
    "Status": 1,
    "Version": 4,
    "_id": {
      "$oid": "558b9295de349a1b87451a21"
    }
   }
   ...