Concurrent management tasks:
1. . Action daemon - automated action (work flow)
2. .数据采集Collection daemon - collects data
3. .能力检查Capability daemon - capability check on nodes
4. .动态主机配置协议DHCP daemon - DHCP client for OpenNMS
5. .发现Discovery daemon - initial and ongoing discovery互联网控制消息协议（Internet Control Message Protocol或简写ICMP）
6. .事件Events manager daemon – manages/stores events
7. .通知Notification daemon - external notification of users
8. .运行情况Outage manager daemon - consolidates events
9. .轮训Poller daemon - polls managed nodes/services
10. .实时控制RTC manager daemon - real time availability information
11. .陷阱SNMP trap daemon – handles SNMP traps
12. .阈值Threshold daemon – monitor for threshold values
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本文转自holy2009 51CTO博客，原文链接:http://blog.51cto.com/holy2010/317711
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