IBM AIX Continuous Availability Features - IBM Redbooks

The SRC is useful if you want a common way to start, stop, and collect status information
about processes. You can use these options in SMIT via smitty src.
2.1.9 PCI hot plug management
PCI hot plug management consists of user (software) tools that allow you to manage hot plug
connectors, also known as dynamic reconfigurable connectors, or slots. A connector defines
the type of slot, for example, PCI. A slot has a unique identifier within the managed system.
Dynamic reconfiguration is the ability of the system to adapt to changes in the hardware and
firmware configuration while it is still running. PCI Hot Plug Support for PCI Adapters is a
specific subset of the dynamic reconfiguration function that provides the capability of adding,
removing, and replacing PCI adapter cards while the host system is running and without
interrupting other adapters in the system. You can also display information about PCI hot plug
slots.
You can insert a new PCI hot plug adapter into an available PCI slot while the operating
system is running. This can be another adapter of the same type that is currently installed, or
of a different type of PCI adapter. New resources are made available to the operating system
and applications without having to restart the operating system. The PCI hot plug manager
interface can be accessed by executing the following command:
smitty devdrpci
Additional detailed information about PCI hot plug management is available in AIX 5L System
Management Guide: Operating System and Devices, SC23-5204, which is downloadable
from the following site:
http://publib.boulder.ibm.com/infocenter/pseries/v5r3/topic/com.ibm.aix.baseadmn/doc/basead
mndita/baseadmndita.pdf
2.1.10 Reliable Scalable Cluster Technology
Reliable Scalable Cluster Technology (RSCT) is a set of software components that together
provide a comprehensive clustering environment for AIX and Linux. RSCT is the
infrastructure used by a variety of IBM products to provide clusters with improved system
availability, scalability, and ease of use. RSCT includes the following components:
► Resource Monitoring and Control (ctrmc) subsystem
► RSCT core resource managers (ctcas)
► RSCT cluster security services (ctsec)
► Topology Services subsystem (cthatsd)
► Group Services subsystem (cthagsd)
These components are explained in more detail here.
Resource Monitoring and Control subsystem
The Resource Monitoring and Control (RMC) subsystem is the scalable backbone of RSCT
which provides a generalized framework for managing resources within a single system or a
cluster. Its generalized framework is used by cluster management tools to monitor, query,
modify, and control cluster resources.
RMC provides a single monitoring and management infrastructure for standalone servers
(single operating system image), RSCT peer domains (where the infrastructure is used by the
configuration resource manager), and management domains (where the infrastructure is
used by the Hardware Management Console (HMC) and Cluster Systems Management
(CSM)).
Chapter 2. AIX continuous availability features 15