SequoiaDB数据库之集群管理
1.1 集群中新增主机1．安装好与其他主机相同的操作系统，并配置好IP地址；2．按照系统配置需求一节配置好主机名/内核参数并将其他的主机名和IP对应关系加入到/etc/hosts中；3．修改每台集群主机上/etc/hosts文件，将新增的主机IP地址与主机对应关系加入到/etc/hosts文件中；4．按照系统配置需求一节验证配置的正确性。5．按照SequoiaDB服务器安装一节，安装SequoiaDB软件。安装时，注意配置管理服务端口与现有系统的端口保持一致。下面对上面环境增加一台主机1:对新安装的操作系统按照上面提到的图形界面安装或者文本安装，安装好数据库软件2：配置IP地址为192.168.25.1563：配置hostname，可以直接在操作系统中执行：hostname sdbserver44：修改host文件 vi/etch/hosts 192.168.25.156sdbserver4 sdbserver4192.168.25.151sdbserver1 sdbserver1192.168.25.152sdbserver2 sdbserver2192.168.25.153sdbserver3 sdbserver3按wq!，进行保存退出在其他节点上同样修改host文件，保证所有的节点host文件一致。 5：在192.168.25.156中增加新的数据节点sdbserver4:~ # /opt/sequoiadb/bin/sdbWelcome to SequoiaDB shell!help() for help, Ctrl+c or quit to exit> var db = new Sdb("192.168.25.156",50000)(nofile):0 uncaught exception: -15----------------报错提示不明确Takes 0.536s.> var db = new Sdb("192.168.25.151",50000) Takes 0.9074s.> var datarg = db.getRG("datagroup1")Takes 0.2140s.> var datarg = db.getRG("datagroup1")Takes 0.2196s.> node3= =datarg.createNode("sdbserver4",51000,"/opt/sequoiadb/database/data/51000")sdbserver4:51000Takes 0.21246s.> node3.start()Takes 7.26959s.启动节点后，用shell命令查询节点情况：> db.listReplicaGroups();{"Group": [ { "dbpath": "/opt/sequoiadb/database/cata/30000", "HostName": "sdbserver1", "Service": [ { "Type": 0, "Name": "30000" }, { "Type": 1, "Name": "30001" }, { "Type": 2, "Name": "30002" }, { "Type": 3, "Name": "30003" } ], "NodeID": 1 }, { "HostName": "sdbserver2", "dbpath": "/opt/sequoiadb/database/cata/30000", "Service": [ { "Type": 0, "Name": "30000" }, { "Type": 1, "Name": "30001" }, { "Type": 2, "Name": "30002" }, { "Type": 3, "Name": "30003" } ], "NodeID": 4 }, { "HostName": "sdbserver3", "dbpath": "/opt/sequoiadb/database/cata/30000", "Service": [ { "Type": 0, "Name": "30000" }, { "Type": 1, "Name": "30001" }, { "Type": 2, "Name": "30002" }, { "Type": 3, "Name": "30003" } ], "NodeID": 5 }, { "HostName": "sdbserver4", "dbpath": "/opt/sequoiadb/database/cata/30000", "Service": [ { "Type": 0, "Name": "30000" }, { "Type": 1, "Name": "30001" }, { "Type": 2, "Name": "30002" }, { "Type": 3, "Name": "30003" } ], "NodeID": 6 }],"GroupID": 1,"GroupName": "SYSCatalogGroup","PrimaryNode": 1,"Role": 2,"Status": 1,"Version": 8,"_id": { "$oid": "526e1ae519b8314ddc83b1f4"}}{"Group": [ { "HostName": "sdbserver1", "dbpath": "/opt/sequoiadb/database/data/51000", "Service": [ { "Type": 0, "Name": "51000" }, { "Type": 1, "Name": "51001" }, { "Type": 2, "Name": "51002" } ], "NodeID": 1000 }, { "HostName": "sdbserver2", "dbpath": "/opt/sequoiadb/database/data/51000", "Service": [ { "Type": 0, "Name": "51000" }, { "Type": 1, "Name": "51001" }, { "Type": 2, "Name": "51002" } ], "NodeID": 1001 }, { "HostName": "sdbserver3", "dbpath": "/opt/sequoiadb/database/data/51000", "Service": [ { "Type": 0, "Name": "51000" }, { "Type": 1, "Name": "51001" }, { "Type": 2, "Name": "51002" } ], "NodeID": 1002 }, { "HostName": "sdbserver4", "dbpath": "/opt/sequoiadb/database/data/51000", "Service": [ { "Type": 0, "Name": "51000" }, { "Type": 1, "Name": "51001" }, { "Type": 2, "Name": "51002" } ], "NodeID": 1003 }],"GroupID": 1000,"GroupName": "datagroup1","PrimaryNode": 1002,"Role": 0,"Status": 1,"Version": 5,"_id": { "$oid": "526e1d4519b8314ddc83b1f5"}}Return 2 row(s).Takes 0.3383s.从上面Sequoiadb Shell命令行结果中，检查分区组配置情况，可以看到数据组新增了一个数据节点。在监控页面中，我们更加清晰的看到物理设备中添加了一台sdbserver4的主机。
http://blog.itpub.net/attachment/201311/26/10701850_1385445576gh23.jpg
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上面为新增加的节点信息。
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