1
Introduction

Asynchronous Replication

A disaster recovery site is crucial for companies which care about their data and it's A MUST for companies which are under regulatory requirements. On-site Redundancy (RAID, Synchronous Mirroring, etc.) does not guarantee data protection from hurricanes, floods and earthquakes that could destroy a whole primary datacenter.

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Problem

Problems of Disaster Recovery Site Implementations

High cost, performance impact, and compromised data integrity are typical issues for a conventional Disaster Recovery (DR) site implementation.

A traditional replication solution presents the following cost-related problems:

  • Typical DR replication solutions require similar or even identical hardware sets on both primary and remote sites. Consequently, capital and operational expenditure is increased because there is twice as much hardware to purchase.
  • WAN throughput requirements increase if data reduction technologies are not used on the primary site, since all the data changes made on the primary storage will be sent to the DR site. The demands for the WAN data link keep rising, resulting in the need for very high performance and expensive WAN connections.

Enabled Disaster Recovery replication impacts performance (network, CPU, hard disks, etc.) for the following reasons:

  • Storage Array routine tasks and the recently enabled DR replication will compete for system resources, reducing performance. Running DR replication over the critical path may be a significant bottleneck in the performance and reliability of the entire system.
  • Replicated data usually gets rebuffered on the primary site and this impacts the storage sub-system, causing a decline in performance and over-provisioning of disk space.

Compromised data integrity. If the data on the primary site gets corrupted for any reason (malware, human factor, etc.), then it will be corrupted on the DR site, since errors are also replicated. There would be no possibility of rolling back to the original state with consistent data since the data on both sites would be damaged.

Typical DR solution

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Solution

Asynchronous Replication

Minimal StarWind Virtual SAN DR setup is just one virtual machine on the DR site since it is a pure software solution, which is extremely cost-effective. It works on any hypervisor that runs on existing general-purpose hardware and in private or public Cloud (e.g. Amazon or Azure). This solution will not affect the performance of the whole system since the DR site does not require high performance.

StarWind implements replication as asynchronous, putting it to the background and using snapshots as the source. As a result, StarWind eliminates the performance and space over-provisioning problems typically encountered with traditional DR replication solutions.

Overload of the WAN data link is eliminated by combining StarWind space reduction technologies — deduplication, compression, snapshots, change block tracking, etc. As a result, there is a significant decrease in the amount of actual data transferred. Due to the reduction in WAN requirements there is no need to buy high-cost data links.

Data Integrity. StarWind snapshots technology restores to the latest integral point of data even if corruption occurred on the primary and DR sites.

StarWind Asynchronous Replication

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Conclusion

Achieve High Performance and Data Integrity with Asynchronous Replication

The combination of StarWind data-compression and replication technologies eliminate the issues of high cost, performance impacting and data integrity typical with conventional DR implementations. Allowing installation to take place in the cloud VM for DR purposes and moving the replication and data compression to the background, it prevents the common pitfalls found in traditional DR solutions.

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What The World Says About Us

StarWind gets praise for its solution's high level of customization in the 2019 Magic Quadrant for HCI



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Success Stories

We were able to build 2-node storage clusters based on virtualization in 19 hypermarkets without any problems and with high cost-efficiency.

Vass Sandor, IT Infrastructure Leader

By being able to virtualize our environment with StarWind, we were able to retire some old hardware, get our services highly available, reduce power consumption and heat in our server closet.

David Gardner, Information Systems Manager

We are satisfied with StarWind. The support is really fantastic. Whenever any issue arises, the response is very prompt, and solution is immediate.

Srinivas Kouda, Company’s Representative

StarWind got us off the clustered environment, which was a big help. So, I could regain control of my storage and reclaim and redistribute the space we desperately needed.

Ryan Fulton, Company’s Representative

Price + Simplicity. StarWind VSAN offers great pricing and allows us to get work done without expensive custom hardware. It also makes getting back online quick and easy after an outage or hardware failure.

Aaron Hayes, IT Manager

We chose StarWind Mainly because of the cost compared to other vendors. Simplicity of setup was also a major factor and I like the fact that you don’t need a vendor certified engineer to perform the installation.

John Harris, Windows System Administrator,
Department of Physics, University of Oxford

Because of recommendations of older colleagues, with StarWind, we got a reliable storage with no additional hardware. There was a need to increase IT infrastructure performance and we saw StarWind as the most cost-effective solution.

Željko Medić, Director of IT Department

StarWind is the best storage product I have ever used! It satisfies and exceeds requirements.

Joe Gursky, Director of IT
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