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Chapter 3 - System Components CHAPTER 3 - SYSTEM COMPONENTS Note: The hardware requirements outlined in this section may have alternate recommendations for customer's operatingsystems under a significant load. The term "Large Site" or "Large Sites" is used to describe such systems- Large Sites are those with forty (40) or more CAD workstations inregularuse, with 200 or more on duty units with AVL/mobile devices or heavy call volume (over 2000 incidents a day). -9.-INFORM The Inform CAD Database Server operates primarily Microsoft products — that is, Microsoft Windows and SQL Server. TriTech recommends against the use of other applications on the Inform CAD Database Server. 9.1 DATABASE SERVER OVERVIEW 9.1.1 DATABASE SERVER HARDWARE PLATFORMS Inform CAD Database Server may be deployed in a single server environment, a clustered environment (for server redundancy), or on a fault tolerant platform. / Single Server Single server systems do not have an option for automatic system failover. The Hot Standby/Disaster Server solution described in a later section of this document can provide for a rapid manual failover to a back-up server for single server systems. / Dual Server TriTech has previously deployed two different dual server systems — Octopus and Microsoft Cluster Server (MSCS). TriTech no longer deploys these systems for new projects TriTech does not directly support either of these systems. If a customer elects to deploy this type of a software redundancy solution, they will need to provide or arrange for support of such a system. / Inform CAD Fault Tolerant Server (Stratus ftServer) TriTech offers fault tolerant server systems from Stratus. Fault tolerant systems offer hardware with no single point of failure — providing 99.999% hardware up time (not more than five minutes of unplanned hardware down -time in a year). The Stratus ftServers utilize Windows and SQL Server without the use of MSCS. Stratus offers an optional Active Service Architecture to allow for a process called Active Upgrade. This allows for splitting the Stratus server components when performing some forms of system maintenance. This allows the system to operate on one "slice" while working on the other slice. This option is described in more detail in Section 13. The contents of this material are confidential and proprietary to TriTech Software Systems, Inc. and may not be reproduced, published or disclosed to others without the prior written consent of TriTech Software Systems, Inc. ©P015 TriTech Software Systems