HP StorageWorks Reference Information Storage System V1.0 Administrator Guide (May 2004)
Monitoring and Reporting Tool Chapter 1:
Key Concepts
HP StorageWorks Reference Information Storage System Administrator Guide , April 2004 1-3
Monitoring and Reporting Tool
Persist Control Center
The Persist Control Center (
PCC
) monitors the system and reports on its
health and activity. PCC provides reports on all of the following:
•
system health (status)
•
system performance
•
smart cell states
Hosts in the system (and their services) are organized into groups of the same
type, called
host groups
. You can, for example, look at all hosts of type smart
cell, by displaying the status of the host group
SmartCells
.
The expression “
Persist Control Center
” refers to both the behind-the-scenes
monitoring functions and the user interface that reports on their findings. In
both of these roles, the system uses software provided by Nagios,
www.nagios.org
. (The PCC is part of the system it monitors, so it monitors
itself, as well – see
Nagios Info
, on page 2-39, and
Nagios Stats
, on page 2-42.)
Monitoring and Reporting Methods
System monitoring is reported both online, with a web-based (HTML) user
interface, and offline, by email to selected contacts. Email reporting provides
a subset of the information provided online.
Hosts and services are monitored by polling. You schedule the polling
intervals for services, but host polling is purposely kept to a minimum.
Depending on the polling interval, there is more or less delay between occur-
rences on the system and the reporting of those occurences in the PCC
interface. In general, a host is polled only at system startup and after one or
more service checks indicate a potential host problem. As long as the services
appear to be functioning correctly (
OK
), the host is assumed to be healthy
(
UP
). You can selectively enable or disable polling of hosts and services.
If monitoring indicates that a host is not functioning correctly (
DOWN
), then
none of its services are available (they can be reported as having any status
except
OK
). If a service is reported as having
CRITICAL
status, but the host is
UP
, it is likely that the service needs to be restarted.