Evidian SafeKit, the easiest-touse redundancy software toachieve 24/7 high availabilityof business-critical applications
In a world where continuous access to your data and applications is critical for business success, you need 24/7 uptime with zero scope for any deviations. Evidian SafeKit
is a comprehensive, software-based high availability product that provides continuous,
non-stop operations of your critical applications so your business runs like clockwork.
What is SafeKit?
SafeKit is an all-in-one of fering from Evidianthat provides business continuity and load-balancing. SafeKit runs on Windows and Linux andeliminates the need for shareddisks, OS and database enterprise editions or any special skills.

This easy-to-deploy, cost-effective solution does not
require any specialized computer or software training— enabling a shorter learning curve, simple assimilationand faster knowledge transfer.

Application

Real-time
replication

SafeKit

Automatic
failoverNetwork loadbalancing

Software-onlyhigh availability

What are the target markets?

Why choose SafeKit?

This platform agnostic, software-based solution can beseamlessly applied to critical applications in a broad range
of industries such as manufacturing, transport, telecom,healthcare and finance. Its ease-of-use and adaptability
makes it perfect for any company deploying a criticalapplication in a vertical market, or those searching for a
simple high availability solution that will work with theirapplications. SafeKit is the ideal solution for software publishers, resellers and distributors.

• Microsoft or Linux clustering is too complex• Shared disks on a SAN, network load balancers, enterprise editions for database replication are too expensive• You need real-time synchronous replication with no data
loss on failure contrary to asynchronous replication• You need automatic failover and failback• You need an agnostic high availability solution that works
with physical machines, virtual machines and public
cloud infrastructure

Software clustering vs. hardware clustering
A simple software cluster with the SafeKit
package installed on two servers

Complex hardware clustering with external
storage or network load balancer

Shared nothing vs. shared disk cluster
SafeKit is a shared-nothing cluster —easy to deploy, even in remote sites

A shared disk cluster is complex to deploy

High availability vs. fault tolerance
SafeKit doesn’t require a dedicated server; each server
can be the failover server for the otherRequires a secondary server dedicated toexecuting the same application, synchronizedat the instruction level

Synchronous replication vs. asynchronous replication
SafeKit implements real-time synchronous
replication with no data loss in case of failure

With asynchronous replication,
there is data loss on failure

Byte-level file replication vs. block-level disk replication
SafeKit implements real-time byte-level file replicationand is simply configured with application directories toreplicate, even in the system disk

Block-level disk replication is complex toconfigure and requires putting application
data in a special disk

Heartbeat, failover and quorum to avoid 2 master nodes
To avoid 2 masters, SafeKit utilizes a simple split
brain checker configured on a router

To avoid 2 masters, other clusters require a complex
configuration with a third machine, a special quorum
disk, or a special interconnect

Virtual IP address and load balancing
A SafeKit cluster requires no dedicated proxy
servers or special network configurationfor virtual IP addresses

Special network configuration is required inother clusters for virtual IP addresses. Note: SafeKit
offers a health check adapted to load balancers

Application HA and full virtual machine HA
SafeKit supports application HA with scripts for a quick
restart or VM HA with reboot of VMs without additional
scripts

Hypervisor clustering solutions don’t support
application HA and require shared disks for VM HA

What are the benefits of SafeKit?

What are the best scenarios for using SafeKit?

• Zero specific skills are required to deploy a SafeKit highavailability solution, instead leveraging a very simple
web console to do the job• A software publisher searching for a high availability
add-on• Zero extra hardware costs as the solution is independent of any hardware, and runs on existing physicalservers, in virtual machines, or in the cloud• Zero extra software costs because SafeKit works withstandard editions of OS and databases• Try and buy options enable you to test SafeKit for freeon Windows or Linux. Free trial on evidian.com/SafeKit• Synchronous replication to ensure no data loss, as any
data committed to disk by a transactional applicationis replicated on the secondary node
• Automatic failover, automatic failback on a secondary
node in case of hardware/network/software failures• A reseller wishing to deploy high availability in many
companies• High availability and disaster recovery solution with 2
nodes in 2 remote sites• Replication of a few Terabytes, with less than 1,000,000
files• 1Gb/s or 10 G/s LAN or extended LAN between nodes• Load balancing of less than 10 servers• Replication of less than 32 VMs when full VMs are
replicated under Hyper-V or KVM

Eviden is a registered trademark of BULL SAS. © Copyright 2023, BULL SAS. Confidential information owned by BULL SAS, to be used by the recipient only. This
document, or any part of it, may not be reproduced, copied, circulated and/or distributed nor quoted without prior written approval from BULL SAS.

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