Medical Archive Solutions User Guide

HPMA User Guide
196
HP Medical Archive
Overview of Server Manager
Each server used in an HP Medical Archive deployment runs the
Server Manager application. The Server Manager program is used to
supervise starting and stopping services on the server, ensuring
services gracefully join and leave the grid. It also monitors services on
the server, and attempts to restart any that report faults.
Grid services have a variety of dependencies on support packages
such as networking, timing synchronization, and third-party
programs such as databases. Server Manager ensures that these
support services are brought online in the correct sequence to meet
dependencies.
Server Manager provides you with a graphical interface on the local
console of the server, enabling coarse (whole server) control and moni-
toring of the device. The state of services is reported, along with server
identity information such as IP addresses. Control buttons allow you
to stop services to perform upgrades, reboot the server, or shut the
server down for hardware maintenance. All operations preserve
graceful service disconnections and restarts; grid operations are
smoothly completed before the services are removed from the grid.
Services and support applications are stopped in a sequence that
avoids breaking any interdependencies.
Server Manager continues to run at all times, monitoring the services
and automatically restarting any that go offline. Should a service go
offline unexpectedly or a server suffer an unexpected power cycle or
reset, Server Manager ensures all services are brought back online
without the need of manual intervention.
Services
The first part of this manual (dealing with the NMS) uses specific ter-
minology for locations, servers, services, and so on. This discussion of
the Server Manager refers to “services” in a broader sense, including
operating system processes such as networking and file systems and
third-party modules such as the MySQL database application. Where
reference to only the grid services is needed, the word “grid” is always
used.