Welcome!

@DXWorldExpo Authors: Zakia Bouachraoui, Pat Romanski, Elizabeth White, Yeshim Deniz, Liz McMillan

Related Topics: @CloudExpo, Microservices Expo, Containers Expo Blog, Agile Computing, @DXWorldExpo, SDN Journal

@CloudExpo: Article

Top Three Best Practices for Migrating to the Cloud

Planning your migration strategy

As an Infrastructure-as-a-Service provider, Bluelock sees a lot of migration of applications. Migration is occurring from physical servers to cloud, from private cloud to public cloud and back to private cloud from public cloud.

Migration can be tricky and a poor migration strategy can be responsible for costly time delays, data loss and other roadblocks on your way to successfully modernizing your infrastructure.

While each scenario is different, I'd like to identify three key best practices that will help your team create a solid, successful plan for migrating your application.

Even before you begin to move your application, there's a lot of best practice that goes into choosing which application to migrate to the cloud. Regardless of whether you are migrating that app to a public cloud or a private cloud, you should assess the app for data gravity and connectivity of the application.

Best Practice: Understand the Gravity of Your Data
Data Gravity is a concept first discussed by Dave McCrory in 2010. It's the idea that data has weight and the bigger the data is, the harder it is to move. The bigger the data, the more things are going to stick to it.

McCrory states in his original blog post about Data Gravity, "As data accumulates (builds mass) there is a greater likelihood that additional Services and Applications will be attracted to this data."

McCrory goes on to explain that large data can be virtually impossible to move because of latency and throughput issues that develop upon movement. On his website, datagravity.org, McCrory explains that to increase the portability of an application it should have a lower data gravity.

When moving tier one applications from a physical datacenter to a private or public cloud, we have to take data gravity into account because it will impact the migration.

As you are talking about migrating an application, you can think of the full stack of components as a single VM or a group of VMs that are a vApp (see Figure 1).

Think of a VM with an OS. If we were to migrate that entire VM to the public cloud, we're copying anywhere from 8-20 GB of data with that OS for no reason at all as the cloud you're migrating the app to might already have the OS available to it.

Rather than transferring the data for the OS, whenever possible use metadata instead to describe what OS you want and the configurations using a template or an image on the public or private cloud side. The same metadata concept can be applied to middleware instances too.

What we're left with is our actual data and what the app is. The app is static and static info is easy to move because you can copy it once. There's no need to replicate.

The most difficult part of the migration is the data, however. There's no easy way to shrink down the data, so you need to evaluate the weight of the data in the app you're considering migrating.

Especially if you're a high transaction company, or if it's a high transaction application, as that would be a lot of data to replicate. The data of the app constitutes 99% of the data gravity of the application.

Part of the best practice of understanding the gravity of your application is to understand the ramifications of moving a tier one application with a large amount of data and establish where the best home for that application is.

Another aspect that you should evaluate as part of your pre-migration plan is to determine how connected your VM or vApp is to other apps.

If you have a lot of applications tightly coupled to the application you want to migrate, the cloud might not be an option for that application, or at least only that application.

Best Practice: How Connected Is Your App?
Beyond what applications are connected to the app you want to migrate, the important aspect to evaluate is how coupled the application in question is to other applications, and how tight or loose of a couple they are.

Does your application have data that other applications need to access quickly? If so, a move all or nothing philosophy is your best option.

If you have an application that is tightly coupled to two or three others, you may be able to move them all to the cloud together. Because they are still tightly coupled, you won't experience the latency that would occur if your cloud-hosted application needed to access a physical server to get the data it needs to run.

A step beyond identifying how many apps are tied to the application you wish to migrate, work next to identifying which of those applications will be sensitive to latency problems.

How sensitive it can be should be a consideration of whether you should migrate the app or not.

To be able to check this best practice off your list, be very sure you understand everything your application touches so you won't be surprised later, post-migration.

The final part gets down to the nitty gritty... choosing the correct migration strategy.

Best Practice: Pick Your Migration Strategy.
Your best-fit migration strategy will be a function of the features of the application.

Option one is data migration of just the data. This is typically the correct choice for tier 1 and 2 applications.

Let's say you are able to migrate your VM or vApp. But, it's constantly changing and if it's a tier one application, we may not be able to afford a lot of downtime. Typically, we'll have to invoke some sort of replication.

Replication is an entirely separate subject, but when I think of replication, I think of the size of the data, the rate of change and the bandwidth between our source and target.

Without going into too many details of replication, let's assume you use some sort of SQL or MySQL program for database replication. What you've done is set up your new cloud to have this OS provision. You've got a MySQL provision and the two SQLs are talking to each other and replicating the data.

Option two for migrating your application is machine replication. This is best for tier 1 and tier 2 applications that can afford some downtime. It involves stack migration. There is less configuring in this scenario, but there is more data migrating.

Option two is best if you're moving to an internal private cloud. You will be able to replicate the entire stack because you have plenty of bandwidth to move stuff around.

It's important to note the portability of VMware, because VMware allows you to package the entire VM/vApp, the entire stack, into an OVF. The OVF can then be transported anywhere if you're already on a virtualized physical server.

Option three involves cold P2V migration. You typically see this for tier 2 and 3 apps that are not already virtualized.

The concept involves taking a physical app and virtualizing it. VMware has a VMware converter that does P2V, and it's very easy to go from a physical to a private cloud using P2V. It is, however, an entirely different set of best practices.

In option three, there is no replication. Those apps can also be shipped off to a public cloud provider to run in the public cloud after being virtualized.

A final path some companies take is to treat it as a Disaster Recovery (DR) scenario. Setting up something to basically do replication from one machine to another. Replicate the entire stack from point a to point b, and then click the failover button.

Each application, and migration strategy, is unique, so there is no detailed instruction manual that would work for everyone. The best strategy for some applications may be to stay put, especially if you find that steps one and two of the pre-migration evaluation is closely connected or especially weighty. To truly enjoy the benefits of cloud, you want the right application running that you can leverage to the fullest extent.

When planning your migration strategy, ask for help from those who are familiar with similar use cases and plan and evaluate extensively to save yourself a lot of time, money and headaches that come from rushing into a migration without a strategy.

More Stories By Jake Robinson

Jake Robinson is a Solutions Architect at Bluelock. He is a VCP and former CISSP and a VMware vExpert. Jake’s specialties are in infrastructure automation, virtualization, cloud computing, and security

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


DXWorldEXPO Digital Transformation Stories
The deluge of IoT sensor data collected from connected devices and the powerful AI required to make that data actionable are giving rise to a hybrid ecosystem in which cloud, on-prem and edge processes become interweaved. Attendees will learn how emerging composable infrastructure solutions deliver the adaptive architecture needed to manage this new data reality. Machine learning algorithms can better anticipate data storms and automate resources to support surges, including fully scalable GPU-c...
Using new techniques of information modeling, indexing, and processing, new cloud-based systems can support cloud-based workloads previously not possible for high-throughput insurance, banking, and case-based applications. In his session at 18th Cloud Expo, John Newton, CTO, Founder and Chairman of Alfresco, described how to scale cloud-based content management repositories to store, manage, and retrieve billions of documents and related information with fast and linear scalability. He addresse...
A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to great conferences, helping you discover new conferences and increase your return on investment.
Poor data quality and analytics drive down business value. In fact, Gartner estimated that the average financial impact of poor data quality on organizations is $9.7 million per year. But bad data is much more than a cost center. By eroding trust in information, analytics and the business decisions based on these, it is a serious impediment to digital transformation.
We are seeing a major migration of enterprises applications to the cloud. As cloud and business use of real time applications accelerate, legacy networks are no longer able to architecturally support cloud adoption and deliver the performance and security required by highly distributed enterprises. These outdated solutions have become more costly and complicated to implement, install, manage, and maintain.SD-WAN offers unlimited capabilities for accessing the benefits of the cloud and Internet. ...
Business professionals no longer wonder if they'll migrate to the cloud; it's now a matter of when. The cloud environment has proved to be a major force in transitioning to an agile business model that enables quick decisions and fast implementation that solidify customer relationships. And when the cloud is combined with the power of cognitive computing, it drives innovation and transformation that achieves astounding competitive advantage.
SYS-CON Events announced today that Silicon India has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Published in Silicon Valley, Silicon India magazine is the premiere platform for CIOs to discuss their innovative enterprise solutions and allows IT vendors to learn about new solutions that can help grow their business.
DXWorldEXPO LLC announced today that "IoT Now" was named media sponsor of CloudEXPO | DXWorldEXPO 2018 New York, which will take place on November 11-13, 2018 in New York City, NY. IoT Now explores the evolving opportunities and challenges facing CSPs, and it passes on some lessons learned from those who have taken the first steps in next-gen IoT services.
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
Everyone wants the rainbow - reduced IT costs, scalability, continuity, flexibility, manageability, and innovation. But in order to get to that collaboration rainbow, you need the cloud! In this presentation, we'll cover three areas: First - the rainbow of benefits from cloud collaboration. There are many different reasons why more and more companies and institutions are moving to the cloud. Benefits include: cost savings (reducing on-prem infrastructure, reducing data center foot print, redu...