Over the course of the last year, we have seen several of our clients either start exploring or make plans to move their SaaS products to the “Cloud” or an IaaS provider. We thought we would share some of the misconceptions we sometimes see and our advice.
– I can finally focus on product development and software engineering and not worry about this infrastructure stuff.
The notion that IaaS providers like Amazon have eliminated your worries about infrastructure is only partially true. You may not need to understand everything about designing an infrastructure with bare metal but you need to make sure you understand how your virtual configuration in the Cloud will affect your product. IaaS helps us to quickly deploy infrastructure for our products but it doesn’t eliminate the need for good high availability and fault tolerance design. There are several levers you can pull within an IaaS console and design decisions that will impact your products performance. To ensure good design and configuration, its ultra important that your SaaS product engineering team is made up of talent that has expertise in distributed application architecture design, infrastructure, security, and networking. Having this knowledge will help you design a high performing, fault isolated product for your business.
– Going to the cloud pretty much guarantees me high availability because of auto scaling.
Going to the cloud will provide you with the ability to scale quickly as load increases but it will not provide you with high availability. For example, if you have a monolithic code base that you deployed and you are pushing to production on a regular basis, there is a pretty good chance you will introduce a defect at some point that impacts the availability of your entire service and business. We advise our clients to split their applications appropriately, deploy the services to separate instances, and, assuming you are using Amazon, configure them to run across multiple zones within a region at a minimum (preferably across regions). This allows you to focus dedicated teams to the individual services and reduce the likelihood of introducing a defect that takes down your system.
– The Cloud will be cheaper than a collocation or managed hosting provider.
There are several factors that need to be considered before you can confirm that is cost effective. You should look closely at load on your servers. If your servers are not serving traffic around the clock, it may be better from a cost perspective for you to buy and maintain your own infrastructure in a collocation or in an existing data center you may have. The economics of this decision is changing rapidly as IaaS pricing is declining due to the competition in the industry. A simple spreadsheet exercise will help determine if the move to Cloud would be cost effective for your business.
– The Cloud isn’t secure so we better not use it.
The cloud isn’t necessarily what makes or breaks security around your SaaS product. Many believe that public cloud services like Amazon’s EC2 service isn’t secure. First off, you are far more likely to experience a security breach because of an employee’s actions (either intentionally or unintentionally) than caused by an infrastructure provider. Secondly, Amazon likely has invested much more in security at various layers, including their physical data centers, than most companies we see who have their own data centers. Amazon has designed the infrastructure to isolate customer instances and you can also choose to take advantage of Amazon Virtual Private Cloud that can be configured to create an isolated network. There are various options for encrypting all of your data as well. This only touches the surface for security design options you have and they continue to be enhanced everyday. You can see why it’s important to staff your team with an engineer who has experience in this space.
If you are looking to move to Cloud, don’t rush into the decision. Do your homework and make sure it’s right for your business. Make sure you have the talent that has experience with the technology that will get you there and run your operations. Once you make the leap, you will have to live with it for a while.
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