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2 Architectural Overview
Contents
The SLRS provides a system platform for the cash registers and in-store servers,
a scalable deployment infrastructure, and a centralized management system.
The CRs are implemented in a variety of hardware forms, with the main differ-
ence being whether they are equipped with hard drives (diskless vs. diskful).
Figure
2.1
describes the system architecture: one centralized administration
server (AS) controls a large number of branch servers (BS), which in turn pro-
vide the local infrastructure for the cash register point of sales (POS) systems.
All servers are intended to be set up as highly available two-node failover
cluster systems.
2.1 Administration Server
All system management for BS and POS systems (CR) is done on the central
administration server (AS). It provides the following services:
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