HP XP P9000 for Compatible High Perf FICON Connectivity Software - Manual (Page 8)

1 Performance overview
Unless specified otherwise, the term HP XP P9000 refers to the HP XP P9500 Disk Array.
This chapter provides an overview of the Remote Web Console software products that enable you
to monitor and manage the performance of the HP XP P9500 storage system.
Performance Monitor overview
Performance Monitor enables you to monitor your HP XP P9500 storage system and collect detailed
usage and performance statistics. You can view the storage system data on graphs to identify
changes in usage rates, workloads, and traffic, analyze trends in disk I/O, and detect peak I/O
times. If there is a decrease in storage system performance (for example, delayed host response
times), Performance Monitor can help you detect the cause of the problem and resolve it.
Performance Monitor provides data about storage system resources such as drives, volumes, and
microprocessors as well as statistics about front-end (host I/O) and back-end (disk I/O) workloads.
Using the Performance Monitor data you can configure Performance Control, Cache Residency,
and Cache Partition operations to manage and fine-tune the performance of your storage system.
NOTE:
•
To correctly display the performance statistics of a parity group, all volumes belonging to the
parity group must be specified as monitoring targets.
•
To correctly display the performance statistics of a LUSE volume, all volumes making up the
LUSE volume must be specified as monitoring targets.
•
The volumes to be monitored by Performance Monitor are specified by control unit (CU). If
the range of used CUs does not match the range of CUs monitored by Performance Monitor,
performance statistics may not be collected for some volumes.
Performance Control overview
Performance Control allows you to designate prioritized ports (for example, for production servers)
and non-prioritized ports (for example, for development servers) and set upper limits and thresholds
for the I/O activity of these ports to prevent low-priority activities from negatively impacting
high-prority activities. Performance Control operations can be performed only for ports connected
to open-systems hosts.
Performance of high-priority hosts
In a storage area network (SAN) environment, the storage system is usually connected with many
host servers. Some types of host servers often require higher performance than others. For example,
production servers such as database and application servers that are used to perform daily tasks
of business organizations usually require high performance. If production servers experience
decreased performance, productivity in business activities can be negatively impacted. To prevent
this from happening, the system administrator needs to maintain the performance of production
servers at a relatively high level.
Computer systems in business organizations often include development servers, which are used
for developing, testing, and debugging business applications, as well as production servers. If
development servers experience decreased performance, development activities can be negatively
impacted, but a drop in development server performance does not have as much negative impact
to the entire organization as a drop in production server performance. In this case, you can use
Performance Control to give higher priority to I/O activity from production servers than I/O activity
from development servers to manage and control the impact of development activities.
8 Performance overview