High Availability Solutions (HA solutions) – Videos
Webinar
Evidian SafeKit Webinar – 10mn [+]
With this 10 minutes webinar, you will have an introduction to SafeKit with its two main architectures (mirror, farm), a comparison to competition, the best uses cases and the way to integrate your application inside SafeKit.
3 demonstrations
Microsoft SQL Server cluster with replication and failover (mirror module) [+]
This demonstration shows how to implement easily a Microsoft SQL Server cluster. Configuration, real-time database replication and automatic failover are demonstrated in this video.
Apache load balancing and failover (farm module) [+]
This demonstration shows how to implement easily Apache load balancing and failover inside a farm cluster. It works on Windows or Linux. Configuration, Apache load balancing ans failover are demonstrated in this video.
Hyper-V cluster with replication, failover and load balancing (N mirror modules) [+]
This demonstration shows how to implement easily a Hyper-V cluster. Configuration, real-time VM replication, automatic failover, migration of a VM and load balancing of VMs are demonstrated in this video on 2 VMs.
Other SafeKit videos
Tutorials on the web console [+]
A set of videos are explaining how to use the SafeKit web console.
Software cluster versus hardware cluster video [+]
This video compares SafeKit HA solutions versus hardware HA solutions.
Video of disaster recovery with a software SAN [+]
This video shows how disaster recovery can be simply implemented with the SafeKit High Availability software and without the need of a physical SAN.
SafeKit High Availability Software Demonstration between a Laptop and a Netbook [+]
Understand in 5 minutes the simplicity of the SafeKit high availability solution and the resulting cost-savings with a demonstration of a Windows 7 cluster implemented by a laptop and a netbook
Active-active cluster video with Evidian SafeKit [+]
This video shows an active-active cluster built with 2 SafeKit mirror modules.
SafeKit – clustering software video with load balancing and mirroring [+]
This video shows the SafeKit clustering software with Apache load balancing and Microsoft SQL server mirroring.
Data replication software interrupted by a server failure: video [+]
With this video, you will understand the difference between synchronous replication versus asynchronous replication.
Virtual IP with load balancing and failover video [+]
This video shows a virtual IP with load balancing and failover.
Cluster quorum video : no quorum server and no quorum disk [+]
This Evidian SafeKit video shows the cluster quorum management with no quorum server and no quorum disk
Automatic failover and automatic failback video [+]
This video shows automatic failover and automatic failback in a SafeKit software cluster.
HA dependency between a master module and slave modules [+]
This video shows HA (High Availability) dependency between a master module and slave modules.
FAQ on Evidian SafeKit
3 demonstrations [+]
Application high availability modules [+]
Cloud solutions [+]
Customers [+]
Video Surveillance (CCTV) [+]
Transport [+]
Paris transport company (RATP) chose the SafeKit high availability and load balancing solution for the centralized control room of line 1 of the Paris subway.
20 SafeKit clusters are deployed on Windows and Linux.
Stéphane Guilmin, RATP, Project manager says:
“Automation of line 1 of the Paris subway is a major project for RATP, requiring a centralized command room (CCR) designed to resist IT failures. With SafeKit, we have three distinct advantages to meet this need. Firstly, SafeKit is a purely software solution that does not demand the use of shared disks on a SAN and network boxes for load balancing. It is very simple to separate our servers into separate machine rooms. Moreover, this clustering solution is homogeneous for our Windows and Unix platforms. SafeKit provides the three functions that we needed: load balancing between servers, automatic failover after an incident and real time data replication.”
And also, Philippe Marsol, Atos BU Transport, Integration Manager says:
“SafeKit is a simple and powerful product for application high availability. We have integrated SafeKit in our critical projects like the supervision of Paris metro Line 4 (the control room) or Marseille Line 1 and Line 2 (the operations center). Thanks to the simplicity of the product, we gained time for the integration and validation of the solution and we had also quick answers to our questions with a responsive Evidian team.”
Best use cases [+]
Distinctive advantages [+]
More on the mirror cluster [+]
Demonstration of real-time replication and failover [+]
What are the advantages [+]
- Low Complexity
- Plug&Play deployment with no specific skills
- Suitable for large deployments in many sites (very simple to deploy)
- 2 nodes (3 nodes replication possibility)
- No shared storage requirement
- No Domain Controller requirement
- Well documented API and support
- Synchronous data replication (no data loss in case of failure)
- Replicated directories can be in the system disk
- Supports multiple heartbeats and vitual IP addresses
- Offers configurable software, hardware and network checkers
- For the quorum, does not require a special disk or a third machine or a dedicated link between both servers
- Automatic failover of services with a recovery time in the order of one minute
- Automatic failback when a server comes back after a failure (no manual operation)
- A very simple console to deploy the solution and to maintain it afterwards for end-customer
- Supports human errors (40% of causes of unavailability) thanks to its simplicity
- Supports software failures (40% of causes of unavailability): regression on software update (version N and N+1 can coexist), Operating System frozen, software bug
- Supports hardware and environment failures (20% of causes of unavailability), including the complete failure of a computer room with 2 nodes in two remote sites
What is the recovery time (RTO) [+]
RTO is the time during which the application is unavailable in case of failure. RTO of the SafeKit mirror solution is in the order of 1 mn.
For a hardware failure, RTO = heartbeat timeout (default 30 s, can be changed in userconfig.xml) + time to restart services.
For a software failure or an administrator restart, RTO = time to (cleanly) stop services + time to restart them.
Be careful, with solutions that reboot a full virtual machine in case of failure, the RTO is unpredictable as manual operations may be required after a hardware crash to reboot the virtual machine.
What is the data loss (RPO) [+]
RPO reflects the data loss in case of failure. RPO of the SafeKit mirror solution is 0 as the replication is synchronous and real-time.
Be careful, with asynchronous replication, RPO is not 0 and there is data loss in case of failure when the application restarts on the secondary server.
More information on the architecture [+]
More on the farm cluster [+]
Demonstration of load balancing and failover [+]
What are the advantages [+]
- Low Complexity
- Plug&Play deployment with no specific skills
- Suitable for large deployments in many sites (very simple to deploy)
- 2 nodes or more
- No network load balancers requirement
- No proxy server requirement (above the farm cluster)
- No Domain Controller requirement
- No restriction in VMware due to multicast or unicast address
- Same solution on Windows and Linux
- Well documented API and support
- Supports multiple monitoring channels on multiple networks for server failure detection
- Supports multiple vitual IP addresses
- Offers configurable software, hardware and network checkers
- Offers the mirror cluster with synchronous real-time replication and failover
- Automatic failover with a recovery time in the order of a few seconds
- Automatic failback when a server comes back after a failure (no manual operation)
- A very simple console to deploy the solution and to maintain it afterwards for end-customer
- Supports human errors (40% of causes of unavailability) thanks to its simplicity
- Supports software failures (40% of causes of unavailability): regression on software update (version N and N+1 can coexist), Operating System frozen, software bug
- Supports hardware and environment failures (20% of causes of unavailability), including the complete failure of a computer room with 2 nodes in two remote sites
What is the recovery time (RTO) [+]
RTO is the time during which the application is unavailable in case of failure. RTO of the SafeKit farm solution is in the order of a few seconds on hardware failure.
For a hardware failure, RTO = failure detection timeout through monitoring channels (default a few seconds): after the timeout the load balancing filters are reconfigured.
For a software failure or an administrator restart, RTO = time to (cleanly) stop services + time to restart them.
More information on the architecture [+]
SafeKit Webinar [+]
Pricing - Free trial [+]
