Administrator Guide

The unmap feature reclaims the unused VMFS blocks by removing the mapping between the logical blocks and the physical
blocks. This essentially removes the link between a logical block and a physical block that has unknown or unused resources.
Performance monitoring
Metro node performance monitoring provides a customized view into the performance of your system. You decide which
aspects of the system's performance to view and compare.
You can view and assess the metro node performance using these methods:
● Unisphere Performance Monitoring Dashboard, which shows real-time performance monitoring data for up to one hour of
history.
● Performance statistics collection using the CLI and the API. These methods let you collect and view the statistics, and
export them to an external application for analysis.
Unisphere Performance Monitoring Dashboard
The Unisphere Performance Monitoring Dashboard supports these general categories of performance monitoring:
● Current load monitoring that allows administrators to watch CPU load during upgrades, I/O load across the inter-cluster
WAN link, and front-end against the back-end load during data mining or back up.
● Long term load monitoring that collects data for capacity planning and load balancing.
● Object-based monitoring that collects data for the virtual volume.
The Unisphere Performance Monitoring Dashboard is a customized view into the performance of the metro node system:
Figure 8. Unisphere Performance Monitoring Dashboard (for HTML5)
You decide which aspects of the system's performance to view and compare:
Figure 9. Unisphere Performance Monitoring Dashboard - select information to view (for HTML5)
Performance information is displayed as a set of charts. For example, the following figure shows front-end throughput for a
selected director (for Flash) and all directors (for HTML5):
Features in metro node
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