3.1.2 Matrix Server Administration Guide

Chapter 1: Introduction 5

Management Console. Provides a graphical interface for configuring a

Matrix Server matrix and monitoring its operation. The console can be

run either remotely or from any server in the matrix.

Administrative Network. Handles Matrix Server administrative traffic.

Most Matrix Server daemons communicate with each other over the

administrative network.

ClusterPulse daemon. Monitors the matrix, controls failover of virtual

hosts and devices, handles communications with the Management

Console, and manages device monitors, service monitors, and event

notification.

Distributed Lock Manager (DLM) daemon. Provides a locking

mechanism to coordinate server access to shared resources in the matrix.

All reads and writes to a PSFS filesystem automatically obtain the

appropriate locks from the DLM, ensuring filesystem coherency.

SDMP daemon. Arbitrates and ensures that only one matrix has access to

shared SAN devices, in the event that a server loses connectivity.

SANPulse daemon. Provides the matrix infrastructure for management

of the SAN. SANPulse coordinates filesystem mounts, unmounts, and

crash recovery operations.

PSFS filesystem module. The shared filesystem.

SCL daemon. Manages shared storage devices. The SCL has two primary

responsibilities: assigning device names to shared disks when they are

imported into the matrix, and enabling or disabling a server’s access to

shared storage devices.

psd driver. Provides matrix-wide consistent device names among all

servers.

psv driver. Used by the Matrix Server Volume Manager, which creates,

extends, recreates, or destroys dynamic volumes.

HBA drivers. Matrix Server includes drivers for the supported

FibreChannel host bus adapters.