Monitoring And Comparing Multiple Clusters; Performance Monitoring And Analysis Concepts; Workloads; Access Type - HP StoreVirtual 4000 User Manual

Table 67 Performance Monitor statistics (continued)
Statistic
Memory Utilization
Network Utilization
Network Bytes Read
Network Bytes Write
Network Bytes Total
Storage Server Total
Latency

Monitoring and comparing multiple clusters

You can open the Performance Monitor for a cluster in a separate window. This lets you monitor
and compare multiple clusters at the same time. You can open one window per cluster and rearrange
the windows to suit your needs.
1. From the Performance Monitor window, right-click anywhere, and select Open in Window.
The Performance Monitor window opens as a separate window.
Use the Performance Monitor Tasks menu to change the window settings.
2. When you no longer need the separate window, click Close.

Performance monitoring and analysis concepts

The following general concepts are related to performance monitoring and analysis.

Workloads

A workload defines a specific characterization of disk activity. These characteristics are access
type, access size, access pattern, and queue depth. Application and system workloads can be
analyzed, then described using these characteristics. Given these workload characterizations, test
tools like iometer can be used to simulate these workloads.

Access type

Disk accesses are either read or write operations. In the absence of disk or controller caching,
reads and writes operate at the same speed.
Definition Cluster
system for the sample
interval.
Percent of total -
memory used on this
storage system for the
sample interval.
Percent of -
bidirectional network
capacity used on this
network interface on
this storage system for
the sample interval.
Bytes read from the -
network for the sample
interval.
Bytes written to the -
network for the sample
interval.
Bytes read and written -
over the network for
the sample interval.
Average time, in -
milliseconds, for the
RAID controller to
service read and write
requests.
Volume or Snapshot NSM
- X
- X
- X
- X
- X
- X
Monitoring and comparing multiple clusters 219