How to implement redundant servers with a simple software (Windows/Linux)?

Evidian SafeKit

How to implement active/passive redundant servers with real-time replication and failover?

The SafeKit mirror cluster

Redundant servers with real-time file replication and failover on Windows or Linux

In a mirror cluster, the SafeKit software is installed on two physical or virtual servers running Windows or Linux (on premise or in the Cloud). The primary server is the active server and runs a critical application. The secondary is a passive redundant server receiving in real-time all modifications made by the application inside its files. Clients are connected to a virtual IP address. If the primary server is down, SafeKit restarts automatically the critical application on the passive redundant server which becomes primary and switches the virtual IP address. When the failed server is restarted, it is automatically resynchronized and becomes the passive redundant server running as secondary.

A more detailed scenario of redundancy with real-time replication and failover is explained in this article.

How to implement active/active redundant servers with network load balancing and failover?

The SafeKit farm cluster

Redundant servers with network load balancing and failover

In a farm cluster, the SafeKit software is installed on two or more redundant servers running Windows or Linux (on premise or in the Cloud). All redundant servers are active and run a same critical front-end application. Clients are connected to a virtual IP address. TCP sessions are load balanced between all redundant servers . If one server is down, SafeKit automatically reconfigures load balancing of TCP sessions between the remaining active servers. When the failed server is restarted, it is automatically reintegrated as an active redundant server and receives new TCP sessions.

A more detailed explanation of redundancy with network load balancing and failover is given in this article.

SafeKit Modules for Plug&Play Redundant Server Solutions

SafeKit Redundancy Differentiators against Competition

Demonstrations of Redundant Server Solutions with the SafeKit Software

SafeKit Webinar

This webinar presents in 10 minutes Evidian SafeKit.

In this webinar, you will understand:

  • mirror and farm clusters
  • cost savings against hardware clustering solutions
  • best use cases
  • the integration process for a new application

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