Battle of the Clouds: Multi-Instance vs. Multi-Tenant Architecture

Multi-Instance vs. Multi-Tenant Architecture 

The cloud is part of everything we do. It’s always there backing up our data, pictures, and videos. To many, the cloud is considered to be a newer technology. However, cloud services actually got their start in the late 90s when large companies used it as a way to centralize computing, storage, and networking. Back then, the architecture was built on database systems originally designed for tracking customer service requests and running financial systems. For many years, companies like Oracle, IBM, EMC and Cisco thrived in this centralized ecosystem as they scaled their hardware to accommodate customer growth.

Unfortunately, what is good for large enterprises, does not typically translate to a positive experience for customers. While the cloud providers have the advantage of building and maintaining a centralized system, the customers must share the same software and infrastructure. This is known as a multi-tenant architecture, a legacy system that nearly all clouds still operate on today.

Multi-Instance vs. Multi-Tenant Architecture

Here are three major drawbacks of the multi-tenant model for customers:

  • Commingled data – In a multi-tenant environment, the customer relies on the cloud provider to logically isolate their data from everyone else’s. Essentially, customers and their competitors’ data could be commingled in a single database. While you cannot see another company’s data, the data is still not physically separate and relies on software for separation and isolation. This has major implications for government, healthcare and financial regulations, and not to mention, a security breach that could expose your data along with everyone else.
  • Excessive maintenance and downtime – Multi-tenant architectures rely on large and complex databases that require hardware and software maintenance on a regular basis, resulting in availability issues for customers.  While some departments can experience downtime in the off hours such as sales or marketing, enterprise applications that are used across the entire enterprise need to be operational nearly 100 percent of time. Ideally, enterprise applications should not experience more than 26 seconds of downtime a month on average. They simply cannot suffer the excessive maintenance downtime of a multi-tenant architecture.
  • All are impacted – In a multi-tenant cloud, any action that affects the multi-tenant database such as outages, upgrades, or availability issues affect all those who share that multi-tenancy. When software or hardware issues are found on a multi-tenant database, it causes an outage for all customers. The same goes with upgrades. The main issue arises when this model is applied to run enterprise–wide business services. Entire organizations cannot tolerate this shared approach on applications that are critical to their success. Instead, they require upgrades done on their own schedule for planning purposes and for software and hardware issues to be isolated and resolved quickly.

With its inherent data isolation and multiple availability issues, multi-tenancy is a legacy cloud computing architecture that will not stand the test of time. To embrace and lead today’s technological innovations; companies need to look at an advanced cloud architecture called multi-instance. A multi-instance architecture provides each customer with their own unique database. Rather then using a large centralized database, instances are deployed on a per-customer basis, allowing the multi-instance cloud to scale horizontally and infinitely.

With this architecture and deployment model come many benefits, including data isolation, advanced high availability, and customer-driven upgrade schedules.

Here’s a closer look at each of these areas:

  • True data isolation – In a multi-instance architecture, each customer has its own unique database making sure their data is not shared with other customers. A multi-instance architecture is not built on a large centralized database, instead, instances are deployed on a per-customer basis, making hardware and software maintenance easier to perform and issues can be resolved on a customer-by-customer basis.
  • Advanced high availability – Ensuring high availability of data and achieving true redundancy is no longer possible through legacy disaster recovery tactics. Multiple sites being tested infrequently and used only in the most dire of times, is simply not enough. Through multi-instance cloud technology, true redundancy is achieved with the application logic and database for each customer instance being replicated between two paired, yet geographically separate data centers. Each redundant data center is fully operational and active resulting in almost real-time replication of the customer instances and databases. Coupling a multi-instance cloud with automation technology, the customer instances can be quickly moved between each data center resulting in high availability of data.
  • Customer-driven upgrades – As described above, the multi-instance architecture allows cloud Service Providers to perform actions on individual customer instances, this also includes upgrades. A multi-instance cloud allows each instance to be upgraded on a schedule that fits compliance requirements and the needs of individual customers.

When it comes down to it, the multi-instance architecture clearly has significant advantages over the antiquated multi-tenant clouds. With its data isolation and a fully replicated environment that provides high availability and scheduled upgrades, the multi-instance architecture puts customers in control of their cloud.

By Allan Leinwand

Maxim Melamedov
Trouble is Brewing Cloud Paradise - 2023 Will Determine Company's Long-Term Plans for Cloud Use The relationship between developers and the cloud was practically love at first sight. For years, migration to the cloud in ...
Cybersecurity Bootcamps To Help Build Your Career
Cybersecurity Bootcamps We've discussed the importance of training and the hiring of cybersecurity professionals many times on CloudTweaks over the past 10+ years. Now more than ever as the world enters into a dark era ...
Gary Bernstein
WordPress Website Security You've spent time, effort, and money building your website, so don't let it become outdated and run-down by not taking proper care of it. Here are tips on WordPress Website security, speed, ...
Patrick Melampy
Cloud On-Ramp and Protecting Performance The expansion of remote work and the massive growth in usage of cloud-based applications have stressed existing infrastructure and put a keen focus on the performance of everyone’s network environment ...
Security Breach 10 Useful Cloud Security Tools
Cloud Security Tools Cloud providing vendors need to embed cloud security tools within their infrastructure. They should not emphasize keeping high uptime at the expense of security. Cloud computing has become a business solution for ...
Martin Mendelsohn
The Colonial Pipeline Dilemma The Colonial Pipeline is one of a number of essential energy and infrastructure assets that have been recently targeted by the global ransomware group DarkSide, and other aspiring non-state actors, with ...
Rob Reinauer
The last few years have brought significant changes, adoption and innovation to the cloud space. As 2023 begins, there’s an opportunity to consider what’s in store for the year ahead. From hybrid and remote work ...
Get Smarter
Higher Education A big challenge for professionals of all ages is time. Balancing the responsibilities of work and life leave little time for self-improvement in the form of education. But ongoing education is more than ...
The Backup.png
The Report.png
Answer To Everything.png
Growing Up.png

PLURALSITE

Pluralsight provides online courses on popular programming languages and developer tools. Other courses cover fields such as IT security best practices, server infrastructure, and virtualization. 

(ISC)²

(ISC)² provides IT training, certifications, and exams that run online, on your premises, or in classrooms. Self-study resources are available. You can also train groups of 10 or more of your employees.

CYBRARY

CYBRARY Open source Cyber Security learning. The world's largest cyber security community. Cybrary provides free IT training certificates. Courses for beginners, intermediates, and advanced users are available.