3.5.1 Matrix Server Administration Guide

Chapter 1: Introduction 7

mxperfd. Gathers performance data from files in the /proc filesystem for

use by various system components.

PanPulse. Selects and monitors the network to be used for the

administrative network, verifies that all hosts in the matrix can

communicate with each other, and detects any communication problems.

pswebsvr. The embedded web server daemon used by the Management

Console and the mx utility.

SANPulse. Provides the matrix infrastructure for management of the

SAN. SANPulse coordinates filesystem mounts, unmounts, and crash

recovery operations.

SCL. 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.

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

SAN devices. If a problem causes a matrix to split into two or more

network partitions, the SMDP process protects filesystem integrity by

ensuring that only one of the network partitions has access to the SAN.

Matrix Server includes the following drivers:

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

psv. Used by the Matrix Volume Manager, which creates, extends,

recreates, or destroys dynamic volumes.

Shared SAN Devices

Before a SAN disk can be used, you will need to import it into the matrix.

This step gives Matrix Server complete and exclusive control over access

to the disk. During the import, the disk is given a unique global device

name. The servers in the matrix use this name when they need to access

the disk.