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Key Migration Strategies for Application Migration to the Cloud

While you may already have a plan for cloud migration there are some important strategies which can make the process simpler. These strategies also ensure that you make this move with a lot of caution and you can successfully attain your ultimate goal. When you undertake cloud migration it is not necessary to shift everything to the new environment. You can always keep some applications running in your local tier III data centers while you move the others to a cloud. This is the popular hybrid model being adopted by enterprises which makes it easy for them to perform migration at a pace which suits them.

Businesses need to chalk out a plan for migration which they can even change as migration progresses. This plan will decide how the businesses wish to shift each of their applications and the order in which the apps will be moved. Complexities of shifting the existing apps will depend on their architectures and licensing arrangements. Below are given the most important cloud migration strategies for applications:

1. Re-hosting: Rehosting refers to the popular lift-and-shift approach which means redeploying apps in the cloud environment and also making the necessary changes to the app host’s configuration. This is by far the easiest and fastest cloud migration strategy but it has its trade-offs too. IaaS based advantages of scalability and elasticity will not be available when you use rehosting strategy. At the same time, there are many automated tools for this purpose which has been popularized by Amazon Cloud Services. There are some client enterprises which choose to learn as they perform the migration and therefore they redeploy manually. Whatever the method you use, when apps are finally running in a cloud, they become simpler to re-architect and optimize. You will find the biggest advantages of rehosting for large scale migrations.

2. Re-platforming: Replatforming refers to running application in the cloud infrastructure. So, you may need to optimize some cloud services in this case to get advantages but you will not have to spend a fortune on changing the application’s core structure. So, developers can actually make use of familiar resources, which include development frameworks, legacy programming languages and caches of a company’s codes. The main drawback of this strategy is the still-evolving PaaS market which fails to offer some of the capabilities that existing platforms can offer to developers.

3. Re-architecting: A third key cloud migration solutions for app migration is re-architecting or refactoring. This entails reimagining how the app has been structured and developed. Businesses may find re-factoring to be useful in order to add new features or for better performance which would otherwise be hard to get in the existing environment. The downside to this approach is loss of legacy codes and loss of familiar developmental frameworks. But at the same time, you can get access to top-notch developer tools through the provider’s platform. For instance, you can get productivity tools offered by the PaaS providers such as app templates or data models which are customizable. Another disadvantage with a PaaS solution is that clients tend to become very dependent on their providers. So, any fallout over prices or policies can be very disruptive for the business. When there is a switch of providers, it would imply giving up most of the client’s re-factored apps.

4. Repurchasing: Refers to giving up of a legacy app or platform and then deploying commercially marketed software as a Service. With this approach you will not need development teams when needs for business functions changes fast. This approach indicates a move into the SaaS platform like Drupal or Salesforce. There are however disadvantages of this strategy too in the form of issues like vendor lock-ins, interoperability problems and inconsistent naming conventions.

5. Retiring: The first step in cloud migration is discovering the whole IT portfolio. For this you may have to perform application metering to see the actual use of the apps which are deployed. It is during this exercise that one will find that nearly 20% of the business IT estate is not being used any more. So, retiring the unused apps becomes necessary as it can have a positive effect on the company’s bottom line. Not only does it help businesses enjoy cost savings as it no longer has to maintain these unused apps; it also allows IT resources to be used elsewhere. Side by side, it also does away with security concerns about these outdated applications.

6. Finally, there is a sixth migration strategy retain which implies “revisit” of refrain from doing anything at that moment. For instance, you may be riding out depreciation and you are not yet prepared to prioritize an app which has been recently upgraded or you may not be keen to shift some apps. In such a situation, you should only seek to migrate those apps which are necessary for the business. As the magnitude of the portfolio keeps changing from on-site to the cloud, you can slowly do away with this strategy.

These are some of the key cloud migration strategies which can make your application migration journey smoother and hassle-free.

Read More at: Why are Agile Development Practices Needed for Smooth Cloud Migrations?

vps vs cloud vs aws

Differences between Shared Hosting, VPS Hosting and AWS Cloud Hosting

For those who are keen on web development and launching a website, understanding the differences among AWS or public cloud hosting, VPS and shared hosting are very important. You will need to consider the option which is best for your site and preferably choose an option which is the most cost-effective.

Shared hosting refers to a hosting environment in which the server resources are shared by many websites. So, in shared hosting, you will be provided with a machine which can give the software that can run a site, database management systems like MSSQL and MYSQL, languages like PHP and Java etc to many users by dividing the resources. So, it is even possible to host as many as 100 websites according to the server capacity.

shared-hosting-headerWhat is shared hosting all about?

Shared hosting is perhaps the cheapest hosting option available to businesses and one can get the plans for as less as $4 every month. This makes it the perfect choice for start-ups and other small businesses which do not have a big working budget. In shared hosting, you are relieved of the responsibilities of server functioning since the host will be completely responsible for this. Usually the shared web hosts will offer cPanel which is a very user-friendly interface allowing users to manage their site content easily. The cPanel also makes it super easy for the users to manage files when they do not have SSH knowledge.

The downside to shared hosting is that the users will not be given root access to the servers as they will be shared by many users. So, you will not be able to deploy custom applications or software on this server to suit your business interests. At times, when the site gets very high traffic, there may be resource overloading and consequently the site starts to display error messages. This may even lead to the web host taking down the site for the time being so as to stop other sites on that server from getting affected in the process. Shared hosting is therefore for individuals who are still in the process of learning site development and are not keen to take up the responsibility of installing a server independently.

What is VPS hosting all about?

The VPS is something in between dedicated hosting plans and shared hosting plans; it works like an isolated independent server that has been provided to clients and clients have root access. So, they are free to use it according to their wishes. Most hosting companies will offer single-click installations for VPS servers; alternatively, you can choose custom installations whereby you will be able to set it all up on your own.

The VPS hosting plans are slightly more costly than shared plans, amounting to around $10 a month. Users have the right to reboot or restart the servers and they may install custom software. VPS users cannot typically stop the virtual server unless their subscription is over when their host will automatically shut it down. Users can not only install custom applications on a virtual server; they can even install WHM as their control panel and host multiple sites on VPS servers. Since cPanel is a service for which you must pay, users will need to pay extra to get it besides their hosting charges. The biggest advantage of VPS hosting in comparison to shared plans is that since specific resources are allocated to users, they will automatically make the site faster.

The downside to VPS hosting is that you may be expected to take charge of security measures when you choose unmanaged VPS solutions. When the site traffic puts too much pressure on the resources, you may find it hard to get resources arranged in real time.

What is the Virtual Private Cloud all about?

The VPS is different compared to shared hosting on the one hand and VPS hosting on the other. Here, resources are always available on demand in real time. So, it is like the VPS server except that this server will have access to a huge resource pool which is powered by multiple servers making up a cloud. In the VPC, the resources are not limited to one physical location. While you may be given a particular configuration, you can always get more resources to cater to increased traffic. These resources can be got in real time and your server performance will not be affected in any way. For instance this is what is known as Elastic Load Balancing in AWS. Virtual Private Cloud are much costlier than the other two afore-mentioned options, starting from about $1000 a month. In VPS, users will also have the freedom to switch the servers off and turn them back on when needed. So, it can be a great way to save money when you are not using the server. Expanding the site on VPCs is much simpler because you enjoy elasticity. The VPC can even guarantee 100% uptime.

In case of any hosting requirement, you can easily contact us for Hosting Requirement.