eviden-logo

Evidian > Products > High Availability Software - Zero Extra Hardware > Siemens Siveillance VMS: the simplest high availability cluster between two redundant servers

Siemens Siveillance VMS: the simplest high availability cluster between two redundant servers

With the synchronous replication and automatic failover provided by Evidian SafeKit

How the Evidian SafeKit software simply implements a Siemens Siveillance VMS high availability cluster?

The solution for Siemens Siveillance VMS

Evidian SafeKit brings high availability to Siemens Siveillance VMS, the CCTV video surveillance system, between two redundant servers.

This article explains how to implement quickly a Siveillance cluster with real-time replication and automatic failover of the management services and the SQL database. Management services and SQL can be split on several clusters.

Note that high availability of recording servers is already managed by the Siveillance built-in solution (without real-time replication).

Another solution exists for the Siemens Siveillance suite at the virtual machine level which full replication of Hyper-V virtual machines.

A generic product

Note that SafeKit is a generic product on Windows and Linux.

You can implement with the SafeKit product real-time replication and failover of any file directory and service, database, complete Hyper-V or KVM virtual machines, Docker, Podman, K3S, Cloud applications (see the module list).

A complete solution

SafeKit solves:

  • hardware failures (20% of problems), including the complete failure of a computer room,
  • software failures (40% of problems), including restart of critical processes,
  • and human errors (40% of problems) thanks to its ease of use via its web console.

SafeKit brings two solutions for redundancy and high availability

Redundancy and high availability at the application level

In this type of solution, only application data are replicated. And only the application is restared in case of failure.

Redundancy at the application level for a  software

With this solution, restart scripts must be written to restart the application. This solution is platform agnostic and works with applications inside physical machines, virtual machines, in the Cloud. Any hypervisor is supported (VMware, Hyper-V...).

Examples

Redundancy and high availability at the virtual machine level

In this type of solution, the software is put inside a virtual machine. The full Virtual Machine (VM) is replicated and restarted (Application + OS).

Redundancy at the virtual machine level for a  software

The advantage of this solution is that there is no restart scripts to write per application. This solution is generic for any software. It works with Windows/Hyper-V and Linux/KVM but not with VMware. This is an active/active solution with several virtual machines replicated and restarted between two nodes.

Examples

More comparison between VM HA vs Application HA

SafeKit, a recognized solution on the security market

Milestone has chosen SafeKit

Milestone Video Management Software (VMS) and SafeKit

SafeKit is deployed in 30+ countries with the video management software of Milestone.

SafeKit is validated by Milestone for redundancy and high availability of the management server.

SafeKit is the best solution because it is purely software, completely hardware-agnostic.

Solution preferred by Siemens

SafeKit with Siemens Desigo CC SCADA and with Siveillance suite (video and access control)

SafeKit is available in the Siemens marketplace with its Siveillance suite (video and access control) and with its SCADA software: Desigo CC (building management), SIMATIC WinCC, SIMATIC PCS 7.

SafeKit is deployed by Siemens in Australia, France, the Netherlands, Qatar, Switzerland, the UAE, the UK, the US.

SafeKit recommended by Nedap

Nedap Electronic Access Control Software (EACS) and SafeKit

Nedap, a key player in physical access control, recommends SafeKit for redundancy and high availability of its AEOS application.

The Nedap/SafeKit solution is available with a free trial and a quick installation guide.

TIL Technologies has chosen SafeKit

TIL Technologies Electronic Access Control Software (EACS) and SafeKit

SafeKit is deployed in 100+ customer sites by TIL Technologies for access control and building management.

SafeKit is the high availability option of MICROSESAME.

Innovation award in Video Management Software

Readers of Benchmark Magazine (specialized in physical security systems for resellers & SI) have voted for SafeKit as an innovation in Video Management Software.

This award shows the importance of redundancy in security offerings.

Comparison

Built-in Hyper-V replication

Built-in Hyper-V replication

  • Asynchronous replication => data loss
  • Manual failover (no automatic failover)
  • Not a high availability solution

Microsoft clustering (same as VMware HA)

Microsoft clustering / Hyper-V solution

  • Requires a shared disk
  • Price of the shared disk and its installation (SAN, iSCSI)
  • Configuration complexity of Windows failover cluster (AD…)
  • Remote sites = replicated storage

Evidian SafeKit

SafeKit / Hyper-V solution

  • Simple and economical
  • Synchronous replication => no data loss
  • Automatic failover and failback
  • No shared disk
  • Free trial and quick installation guide

SafeKit free trial + mirror module for Siemens Siveillance VMS and SQL + quick installation guide

How the SafeKit mirror cluster works with Siemens Siveillance VMS and SQL?

Step 1. Real-time replication

Server 1 (PRIM) runs the Siemens Siveillance VMS and SQL application. Clients are connected to a virtual IP address. SafeKit replicates in real time modifications made inside files through the network. 

File replication at byte level in a mirror Siemens Siveillance VMS and SQL cluster

The replication is synchronous with no data loss on failure contrary to asynchronous replication.

You just have to configure the names of directories to replicate in SafeKit. There are no pre-requisites on disk organization. Directories may be located in the system disk.

Step 2. Automatic failover

When Server 1 fails, Server 2 takes over. SafeKit switches the virtual IP address and restarts the Siemens Siveillance VMS and SQL application automatically on Server 2.

The application finds the files replicated by SafeKit uptodate on Server 2. The application continues to run on Server 2 by locally modifying its files that are no longer replicated to Server 1.

Failover of Siemens Siveillance VMS and SQL in a mirror cluster

The failover time is equal to the fault-detection time (30 seconds by default) plus the application start-up time.

Step 3. Automatic failback

Failback involves restarting Server 1 after fixing the problem that caused it to fail.

SafeKit automatically resynchronizes the files, updating only the files modified on Server 2 while Server 1 was halted.

Failback in a mirror Siemens Siveillance VMS and SQL cluster

Failback takes place without disturbing the Siemens Siveillance VMS and SQL application, which can continue running on Server 2.

Step 4. Back to normal

After reintegration, the files are once again in mirror mode, as in step 1. The system is back in high-availability mode, with the Siemens Siveillance VMS and SQL application running on Server 2 and SafeKit replicating file updates to Server 1.

Return to normal operation in a mirror Siemens Siveillance VMS and SQL cluster

If the administrator wishes the application to run on Server 1, he/she can execute a "swap" command either manually at an appropriate time, or automatically through configuration.

Typical usage with SafeKit

Why a replication of a few Tera-bytes?

Resynchronization time after a failure (step 3)

  • 1 Gb/s network ≈ 3 Hours for 1 Tera-bytes.
  • 10 Gb/s network ≈ 1 Hour for 1 Tera-bytes or less depending on disk write performances.

Alternative

Why a replication < 1,000,000 files?

  • Resynchronization time performance after a failure (step 3).
  • Time to check each file between both nodes.

Alternative

  • Put the many files to replicate in a virtual hard disk / virtual machine.
  • Only the files representing the virtual hard disk / virtual machine will be replicated and resynchronized in this case.

Why a failover < 25 replicated VMs?

  • Each VM runs in an independent mirror module.
  • Maximum of 25 mirror modules running on the same cluster.

Alternative

  • Use an external shared storage and another VM clustering solution.
  • More expensive, more complex.

Why a LAN/VLAN network between remote sites?

Alternative

  • Use a load balancer for the virtual IP address if the 2 nodes are in 2 subnets (supported by SafeKit, especially in the cloud).
  • Use backup solutions with asynchronous replication for high latency network.

Partners, the success with SafeKit

This platform agnostic solution is ideal for a partner reselling a critical application and who wants to provide a redundancy and high availability option easy to deploy to many customers.

With many references in many countries won by partners, SafeKit has proven to be the easiest solution to implement for redundancy and high availability of building management, video management, access control, SCADA software...

Building Management Software (BMS)

Video Management Software (VMS)

Electronic Access Control Software (EACS)

SCADA Software (Industry)

SafeKit Customers in all Business Activities

  • Best high availability use cases with SafeKit

    Best use cases [+]

  • High availability of video management, access control, building management with SafeKit

    Video management, access control, building management [+]

  • Harmonic has deployed more than 80 SafeKit clusters for TV broadcasting

    TV broadcasting [+]

  • Natixis uses SafeKit as a high availability solution for banking applications

    Finance [+]

  • Fives Syleps implements high availability with SafeKit for automated logistics

    Industry [+]

  • Air traffic control systems supplier, Copperchase, deploys SafeKit high availability in airports.

    Air traffic control [+]

  • Software vendor Wellington IT deploys SafeKit in banks

    Bank [+]

  • Paris transport company (RATP) chose the SafeKit high availability for metro lines

    Transport [+]

  • Systel deploys SafeKit in emergency call centers

    Healthcare [+]

  • ERP high availability and load balancing of the French army (DGA) are made with SafeKit.

    Government [+]

Demonstrations of Redundancy and High Availability Solutions

SafeKit Overview

Examples of redundancy and high availability solutions with SafeKit.

Full training here

Microsoft SQL Server Cluster

This video shows a mirror module configuration with synchronous real-time replication and failover.

The file replication and the failover are configured for Microsoft SQL Server but it works in the same manner for other databases.

Free trial here

Apache Cluster

This video shows a farm module configuration with load balancing and failover.

The load balancing and the failover are configured for Apache but it works in the same manner for other web services.

Free trial here

Hyper-V Cluster

This video shows a Hyper-V cluster with full replications of virtual machines.

Virtual machines can run on both Hyper-V servers and they are restarted in case of failure.

Free trial here

SafeKit High Availability Differentiators against Competition

SafeKit Modules for Plug&Play Redundancy and High Availability Solutions

Advanced clustering architectures

Several modules can be deployed on the same cluster. Thus, advanced clustering architectures can be implemented:

SafeKit Technical Documentation

SafeKit Training

Introduction

  1. Overview / pptx

    • Demonstration
    • Examples of redundancy and high availability solution
    • Evidian SafeKit sold in many different countries with Milestone
    • 2 solutions: virtual machine or application cluster
    • Distinctive advantages
    • More information on the web site
    • SafeKit training
  2. Competition / pptx

    • Cluster of virtual machines
    • Mirror cluster
    • Farm cluster

Installation, Console, CLI

  1. Install and setup / pptx
    • Package installation
    • Nodes setup
    • Upgrade
  2. Web console / pptx
    • Cluster configuration
    • Configuration tab
    • Control tab
    • Monitor tab
    • Advanced Configuration tab
  3. Command line / pptx
    • Configure the SafeKit cluster
    • Configure a SafeKit module
    • Control commands

Advanced configuration

  1. Mirror module / pptx
    • start_prim / stop_prim scripts
    • userconfig.xml
    • Heartbeat (<hearbeat>)
    • Virtual IP address (<vip>)
    • Real-time file replication (<rfs>)
    • How real-time file replication works?
    • Mirror's states in action
  2. Farm  module / pptx
    • start_both / stop_both scripts
    • userconfig.xml
    • Farm heartbeats (<farm>)
    • Virtual IP address (<vip>)
    • Farm's states in action
  1. Checkers / pptx
    • userconfig.xml
    • errd checker
    • intf and ip checkers
    • custom checker
    • splitbrain checker for a mirror module
    • tcp, ping, module checkers
    • Checkers in action

Troubleshooting

  1. Troubleshooting / pptx
    • Analyze yourself the logs
    • Running an application without SafeKit
    • Take snapshots for support
    • Boot / shutdown
    • Web console / Command lines
    • Mirror / Farm / Checkers

Support

  1. Evidian support / pptx
    • Get permanent license key
    • Register on support.evidian.com
    • Call desk