双机热备份软件(MC/Lock Manager)的几个常用命令

MC/Lock Manager (Multi-Computer/Lock Manager) 是惠普公司推出专门用 来保护关键业务应用免遭软、硬件故障影响的特殊应用软件。

使用MC/Lock Manager，多个节点(系统)被组织成一个企业群集，为局域网(LAN) 上的客户机提供高可用性的服务。

MC/Lock.Manager监控程序监控每一个节点的状态，并且对出现的故障很快 做出反应，使对应用程序的影响减小到最低。

Abbreviations: CN = cluster_name NN = node_name PN = package_name

Explainations: ... = multiple occurences | = OR [descriptor] = optional

1. 如何手动启动MC/Lock Manager？

Start Lock Manager daemons and form a new cluster
#cmruncl [-f] [-v] [-n NN...]
[-f] Force cluster startup without warning message
[-v] Verbose output
[-n ] specific name(s) of node(s) to

2. 单点启动后如何加入另一个节点？

Start Lock Manager daemon on node(s) and join a cluster
cmrunnode [-v] [NN...]
[-v] Verbose output

3. 如何实现节点切换？

切换分两种：本地切换 ( Local Switch ) 和 切换 ( Switch )
当主节点出现网卡故障 ( MAC address or Hardware State Down ) 时，首 先会进行本地切换，备份网卡开始工作；如果此时备份网卡也有故障， 则系统会进行切换，备份节点接管系统工作。

可以手工模拟这些故障以进行故障诊断或检测。

4. 如何监测 Cluster 运行状态？

view information about the current Lock Manger cluster
cmviewcl [-v] [-n NN]... [-p PN]... [-l {package|cluster|node}]
[-v] Verbose output
[-n] View information only about the specific node_name(s).
[-p] package_name... View information only about the specific package_name(s).
[-l] pkg|clus|node Display only package, cluster or node specific information.

5. 如何停止 Cluster 运行？

halt Lock Manager cluster daemons
cmhaltcl [-f] [-v]
[-f] Force the cluster to shutdown even if packages are currently running.
[-v] Verbose output

6. 如何停止运行某个节点而 Cluster 在其它节点继续运行？

halt Lock Manager daemon on node(s) and leave the cluster
cmhaltnode [-f] [-v] [NN...]
[-f] Force the node to halt even if there are packages running on it.
[-v] Verbose output

7. 如何在 Running Cluster 中运行某一个包？

run a Lock Manager package
cmrunpkg [-n NN] [-v] PN...
[-n ] Act on a specific node.
[-v] Verbose output

8. 如何停止一个运行中的包？

halt a Lock Manager package
cmhaltpkg [-n NN] [-v] PN...
[-n ] Act on a specific node.
[-v] Verbose output

9. 如何改变一个包的切换属性？

enable or disable switching attributes for a Lock Manager package
cmmodpkg [-v] [-n NN]... {-e|-d} PN...
[-v] Verbose output
[-n ] Modify attributes on specific node(s) - else globally mod.
-e enable
-d disable
PN - package(s) whose switching attributes are changed