Local Clustering Metropolitan HA Disaster Recovery (over SAN, MAN or LAN)
MAN
Wide Area Disaster Recovery
LAN
WAN
Cluster Server
Cluster Server, Volume Manager
HUAWEI Confidential
Page 7
Active/Active Clustering （互备方式）“symmetric configuration”（对称配置）
Primary server hosts primary application Secondary server hosts secondary application 两个节点提供不同的服 务，互相备用，当一个 节点故障，服务马上有 第二个节点接管服务 Primary server FAILS Secondary server hosts both primary and secondary applications
HUAWEI TECHNOLOGIES CO., LTD. HUAWEI Confidential Page 8
Security Level:
VCS 的基本概念和术语

HUAWEI TECHNOLOGIES Co., Ltd.
HUAWEI Confidential
集群
Local Area Network
Resources
Agents
/data Mount
c1t0d0s0
c1t0d1s0
hme0
qfe1
10.1.2.4 IP
Disk
NIC
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI Confidential
Page 16
Dependencies依赖关系
• Resources can depend on other resources. 资源可以依赖其他资源 • Parent resources depend on child resources. 父资源依赖子资源 • Service groups can depend on other service groups.服务组可以依赖其他服务组 • Resource types can depend on other resource types.资源类型之间也存在依赖， 比如IP类型必须依赖NIC类型 • Rules govern service group and resource dependencies.资源和服务组之间的依赖关 系由规则管理 • No cyclic dependencies are allowed.不允许 出现循环依赖
Primary server hosts application（主机提供服 务, 备机处于等待状态，一 旦主机发生故障，接管 服务）
Primary server FAILS Secondary server hosts primary application
HUAWEI TECHNOLOGIES CO., LTD.
• Application failover is controlled by the service group（应用的失 效转移是由服务组来控制 的）
HUAWEI TECHNOLOGIES CO., LTD. HUAWEI Confidential Page 6
Active/Passive Clustering （主备方式）“asymmetric configuration”（非对称配置）
APPLICATION
Database
File System Volumes Physical PhysicalDisk Physical Disk Disk IP Address Network Card
APPLICATION
Database File System Volumes Physical PhysicalDisk Physical Disk Disk IP Address Network Card
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI Confidential
Page 11
Service Groups 服务组
• • • A service group is a related collection of resources.服务组是资源的 一个集合 Resources in a service group must be available to the system.服务 组中的资源在系统中必须是可用的 Resources and service groups have interdependencies.服务组和资 源存在相互依赖关系
Fibre Switches SCSI JBODS
• • • • Several networked systems几个节点 Shared storage共享存储 Single administrative entity单个管理节点 Peer monitoring相互监控
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI Confidential
Page 2
Security Level:
VCS 预备知识

HUAWEI TECHNOLOGIES Co., Ltd.
HUAWEI Confidential
VCS的几个常用场景
Security Level:
VERITAS Cluster Server

HUAWEI TECHNOLOGIES Co., Ltd.
HUAWEI Confidential
CONTENTS
• VCS 预备知识 • VCS的基本概念和术语 • VCS的管理集群服务 • VCS常见问题的解决 • 总结
Page 15
Agents 代理
• • • • Processes that control resources 控制资源的程序 One agent per resource type每种类型的资源对应一个代理 Agent controls all resources of that type.一个代理控制对应类型的所 有资源 Agents can be added into VCS agent framework.用户可以加入自己 的代理到VCS的框架中
•
Parallel并行
› Can be partially or fully online on multiple servers simultaneously 可以同时在多台机器上运行 › Examples: – Oracle Parallel Server – Web, FTP servers
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI Confidential
Page 5
A Cluster View of Applications
• A “service group” is a collection of resources that monitor the status of an application （服务 组是各种监控应用状态的 资源的集合）
› MountPoint 挂载点 › BlockDevice 挂载设备
•
Other example resource types:其他类型的资源
› › › › Disk磁盘 Share共享 IP浮动IP NIC网卡
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI Confidential
IP
Share NFS Service Groupபைடு நூலகம்
Mount Disk NFS
NIC
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI Confidential
Page 12
Service Group Types 服务组的类型
• Failover失效转移
› Can be partially or fully online on only one server at a time同一时 间只能在一台机器上运行 › VCS controls stopping and restarting the service group when components fail当服务组某个资源出错时，VCS控制它的停止和重启
Cluster Server, Volume Manager, Volume Replicator, Global Cluster Manager
HUAWEI TECHNOLOGIES CO., LTD.
HUAWEI Confidential
Page 4
Clustering: Application and Database Failover 数据库和应用的失效转移
HUAWEI Confidential
Page 10
systems 系统
• • • Members of a cluster集群的一个成员 Referred to as nodes也称之为节点 Contain copies of: 包括如下内容
› Communication protocol configuration files通信协议的配置文件
› VCS configuration files VCS的配置文件 › VCS libraries and directories VCS的安装目录 › VCS scripts and daemons VCS的脚本和后台程序