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  • Frequently Asked Questions (FAQ)

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  • What are the typical hardware requirements for InSite?

    Insite can run on dedicated hardware, or as a virtual appliance.

    Hardware options:-

    • Virtual: 4 vCPUs, 8GB RAM and 50GB disk as standard
      • 4GB for a small to medium environment
      • 16 vCPUs, 32GB RAM and 100GB disk for high numbers of sites
    • Dedicated: Quad core, 8GB RAM 50GB disk
      • 4GB for a small to medium environment
      • Dual Octo core, 32GB RAM and 100GB disk for high numbers of sites
    What technology is InSite built on?

    InSite runs on a Linux operating system. We normally use 64-bit CentOS 5, and we can use 64-bit Redhat Enterprise Linux (RHEL) 5 as well.

    We use the open source database PostgreSQL.

    To help with potential high availability/clustering applications, we use a group communications system called Spread (

    The codebase is mainly C++ for the core functionality, and Perl and Javascript for the web-based UI.

    We use libpqxx ( for connecting to PostgreSQL from C++ and the Perl DBI ( to connect using Perl.

    We use Apache HTTP server (, with various performance modules including Apache::DBI for persistent database connections, and MOD_Perl ( for a persistent Perl interpreter.

    We also use pgbouncer ( ) which is a lightweight connection pooler for PostgreSQL. The database has been extensively tuned for speed and performance.

    We use the standard Linux Net-SNMP libraries.

    What browsers can be used to access the InSite UI?

    InSite provides a web interface which has many advantages for accessibility and maintenance. We use the latest HTML5 technologies and therefore need recent HTML5-compliant browsers. Any HTML5 compliant browser can be used for accessing the InSite dashboards. The management UI requires IE (Internet Explorer) version 9 or later.

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