Management Station

Management stations are the operating centers for managing and monitoring the nodes in the system. With Performance Manager You can monitor the state of one or more managed nodes in real-time. Tables and graphs, such as plot, area, bar, stack bar, and pie charts, show you hundreds of different system values, including:

• CPU performance
• Memory usage
• Disk transfers
• File-system capacity
• Network efficiency
• AdvFS-specific metrics
• Cluster-specific metrics

In addition to monitoring, Performance Manager provides these features for actively managing your network:

• Thresholding: Thresholds can be set to alert you when a potential problem occurs by triggering a response when a threshold is crossed. This response can be notification through a GUI window, an email, pager, or FAX message, or the response can be an actual command execution for system management or archiving.
• Archiving: Metrics can be archived to a file and then graphed, showing resource usage trends and historical analysis. Performance Manager includes these archiving scripts: pm_archiver, pm_delta_archiver, and rc_archiver.
• Commands: Performance analysis, system management, and/or cluster analysis and AdvFS commands (yours and those supplied with Performance Manager) can be run simultaneously on multiple nodes using the GUI.
• For analysis: you can run commands that analyze the state of managed nodes. Commands can be run on the management station or on the managed nodes.
• To take actions: you can run commands that take actions on managed nodes from the management station.
• You can add your own administration tasks to the extensible GUI.

Managed Node

Managed nodes are those that run one or more metrics servers recognized by Performance Manager. Cluster nodes are recognized and displayed as such. A metric server is a daemon process that implements management information base (MIB) variables that the Performance Manager GUI knows about.

A metrics server listens for and services requests for operating system metric information. These requests are issued by management applications such as the Performance Manager GUI. Upon receipt of such a request, a metrics server queries the operating system and returns the appropriate value(s) to the requester.The following are examples of metrics servers supported by Performance Manager:

• Pmgrd Provides general Tru64 UNIX metrics
• Clstrmond Provides TruCluster-related metrics
• svrclu mib Provides common cluster metrics
• os_mibs Provides MIB-II metrics
• advfsd Provides AdvFS-related metrics

The pmgrd metrics server is provided with Performance Manager. Other metrics servers either come with the operating system (such as os_mibs ) or are provided by other products (such as advfsd ).

PM-provided metrics servers are subagents of the Tru64 UNIX extensible SNMP agent ( snmpd ). In addition, they support extensions for bulk data transfer of metric data. Because metrics servers support SNMP, you can use other SNMP applications to access their data. In addition, a set of UNIX commands for command-line metrics server access is also provided.

The nodes and metrics you choose to monitor can be saved as a session, then played back or modified later.