1
Introduction

Journal Synchronization

Modern world business success directly depends on its applications and services availability. These should run 24/7/365 and the storage backend should be able to support this by providing High Availability. This means not just being able to withstand a component failure but also to resume full operation as soon as possible.

StarWind ensures High Availability for applications and services by performing storage synchronous replication between the nodes. However, it is also ultimately important for the synchronization process to complete as fast as possible, in case it was disrupted for any reason. Synchronization of large storage volumes can take a long time, making applications more vulnerable to additional failures, which can lead to downtime.

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2
Problem

Conventional Synchronization Mechanisms Are Inefficient

Synchronous replication ensures that data is available at multiple nodes at the same time. It increases redundancy of the storage subsystem and, as a result, the uptime for applications and services. Nonetheless, replicated storage can get out of sync because of hardware or software failures while synchronizing large amounts of data may take a long time.

During the synchronization process, applications are prone to downtime since storage is only available on synchronized nodes. Subsequent hardware or software failures during this time can cause storage to go offline.

Also, performance of the storage subsystem is lower because of additional workload, which is introduced by the synchronization process.

Full data synchronization

3
Solution

Synchronization Journaling Dramatically Speeds Up Sync After Node Boot Up

In order increase applications and services uptime, even during the synchronization process, and minimize the risks of downtime, StarWind VSAN allows storing synchronization journals on separate storage. In this scenario, StarWind will only synchronize changes written to the storage while one of the partners was out of sync, which minimizes the amount of time needed for synchronization.

StarWind-replicated devices will become available within minutes, which increases the uptime of business critical applications.

Moreover, performance impact is minimal. StarWind partner nodes do not need to synchronize data which was already written on every node in the cluster.

Synchronization based on changes written to synchronization journal

4
Conclusion

StarWind Ensures Maximum Uptime in Every Case

To maximize business applications and services uptime, StarWind Virtual SAN ensures fast recovery of replication partners. This allows not only withstanding node failures but also resuming storage High Availability in a very small amount of time once partner nodes are online.

5
What The World Says About Us

StarWind included as Niche Player for the fourth consecutive time in 2021 Magic Quadrant™ for HCI Software



StarWind
Hyperconverged Infrastructure Software
reviewed April 5, 2021
Industry: Finance
Company size: 3b – 10b usd
01 / 10 Read more
reviewed Sep 13, 2021
Industry: Construction
Company size: <50m usd
02 / 10 Read more
reviewed June 12, 2021
Industry: Manufacturing
Company size: 50m - 250m usd
03 / 10 Read more
reviewed October 14, 2020
Industry: Education
Company size: <5,000 emp
04 / 10 Read more
reviewed March 16, 2021
Industry: Manufacturing
Company size: 3b - 10b usd
05 / 10 Read more
reviewed February 28, 2020
Industry: Finance
Company size: 1b - 3b usd
07 / 10 Read more
reviewed November 14, 2019
Industry: Finance
Company size: 1b - 3b usd
08 / 10 Read more
reviewed October 20, 2016
Industry: Manufacturing
Company size: 3b - 10b usd
09 / 10 Read more
reviewed September 1, 2021
Industry: Services
Company size: <50m usd
10 / 10 Read more
6
Success Stories

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

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

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
7
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