Amazon Web Services vs CloudFoundry

• The ability to scale vertically and horizontally easily.
• The ability to get server notifications
• Ease of use within the AWS GUI

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• Support for Orgs and Spaces that allow for managing users and deployables within a large organization.
• Easy deployment, deploying code is as simple as executing single line from CLI, thanks to build-packs.
• Solid and rich CLI, that allows for various operations on the instance.
• Isolated Virtual Machines called Droplets, that provide clean run time environment for the code. This used to be a problem with Weblogic and other application servers, where multiple applications are run on the same cluster and they share resources.
• SSH capability for the droplet (isolated VM's are called droplets), that allows for real time viewing of the App code while the application is running.
• Support for multiple languages, thanks to build-packs.
• Support for horizontal scaling, scaling an instance horizontally is a breeze.
• Support for configuring environment variable using the service bindings.
• Supports memory and disk space limit allocation for individual applications.
• Supports API's as well as workers (processes without endpoints)
• Supports blue-green deployment with minimal down time

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• Occasionally, we disagree with their roadmap priorities. For example, we really needed Content-Based Routing added to ELB to support our multitenant implementation. The AWS architects agreed that it was a mainstream, valuable request and hinted that they were trying to get it onto the roadmap, but 15 months later there's still no sign of it. I'm sure they have their reasons, but it's a strange and annoying hole in an otherwise invaluable service.
• AWS has had well-publicized outages that have broken the promise of true zone (datacenter) isolation. This was supposed to have been impossible - if you had instances running in two zones within a region, you thought had a solid survivability story. We were forced to react by building out additional redundancy that increased costs beyond our original design estimates. AWS claims to have resolved the problem, but we haven't been confident enough to spin down the extra servers yet.
• There are annoying resource limits, presumably in place to prevent hackers from allocating huge numbers of resources on a compromised account. The problem is that raising the resource limits requires manual action to be taken, and can have a severe impact on production software if your ops team isn't meticulous in checking the limits. As of the last time I checked, these limits weren't available via API, making it impossible to create alarms whenever we get close to exceeding our resource limits.
• AWS is relatively infamous for their poor communications during outages. Their status page will occasionally go without an update for 45 minutes, while half your customers are dead in the water. This is - obviously - infuriating.

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• Does not support stateful containers and that would be a nice to have.
• Supports showing logs, but does not persist the logs anywhere. This makes relying on Cloud Foundry's logs very unreliable. The logs have to be persisted using other third party tools like Elk and Kibana.

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• We've saved over $10,000 in the 2 years we've worked with AWS. We no longer have to pay to upgrade our internal server, we have no downtime. We no longer depend on our developer to come and 'fix' the server when it fails.

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• Positive impact, since it simplifies the deployment time by a huge margin. Without cloud foundry, deploying a code needs coordination with infrastructure teams, while with cloud foundry, its a simple one line command. This reduces the deployment time from at least few hours to few minutes. Faster deployments promote faster dev cycle iterations.
• Code maintenance such as upgrading a Node or Java version is as simple as updating the build-pack. Without cloud foundry, using web logic, the specific version only supports a specific version of Java. So updating the version involves upgrading the version of web logic that needs to involve few teams. So without cloud foundry, it takes at least few days, with cloud foundry, its a matter of few mins.
• Overall, happier Developers and thats harder to quantify.

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