Cloud-Developer-Tips

We used to go through so much trouble to manipulate Amazon Web Services resources from the command-line. There were separate AWS command-line tools for each service, and each needed to be downloaded and had unique configuration, and each had its own unique output format. Eric Hammond wrote in detail about this. With the new awscli tool by Mitch Garnaat (of python boto fame) and his team at AWS, we have a single tool that does it all, uniformly, and can be simply configured. Thanks, Amazon! ...

Ancient wisdom apparently has much to offer modern cloud application architects. This fragment was discovered in a shadowy basement in the Tel Aviv area of Israel. See a PDF of the fragment This finding clearly shows that ancient cloud application architects in the great talmudic academies of Babylon struggled with the transition away from classic databases. At the time, apparently, a widely used solution was known as Urim veTumim (“oracle”). Yet this database was unsuited for reliable use in cloud applications, and the text explores the reasons behind that unsuitability. ...

Building and operating a private cloud ourselves is simple, right? Give our experienced IT folks a budget for hardware and software, a clear mandate, and deadlines, and we’re likely to succeed. That’s what we’ve always done, and it’s worked out tolerably well. Private cloud isn’t so different from running our own virtual machine environment, and we do that already, so why wouldn’t we succeed? I hear this sentiment expressed often so it seems to be a widely held belief. But it’s wrong precisely 97.73 percent of the time - I measured. Unfortunately, too many organizations act on this mistaken belief and experience unnecessary hurt as a result. ...

An informal survey of my application developer friends revealed four main types of motivations driving developers. These four types of motivations are represented in this diagram: Individual developers can be motivated more or less altruistically. Individual developers can also be focused on the external manifestations of success - such as appreciative customers - or on the internal manifestations - such as more power or money. The diagram above is not a judgement of “better” or “worse” motivations - it is simply meant to capture two personality factors and their expression among individual developers. Also note that developers may have different motivations at different times, or even simultaneously in combination. ...

Like companies producing any kind of offering, software companies require three elements in order to successfully deliver: knowing what to build, knowing how to build it, and knowing how to deliver it to the customer. When each of these three functions - research, engineering, and delivery - does its job independently, you get slow progress and uninspired, sub-par products. But when all three functions work together in a customer-centric fashion, you get excellence - in implementation, innovation - in concept, and world-class results - by delivering those two to the customer. ...

Traditional descriptions of cloud computing and the various cloud operating models - IaaS, PaaS, SaaS - focus on the locus of responsibility for various layers of the system: facilities, network, storage, servers, etc. But these descriptions typically omit a critical element. Can you spot it in the diagram below? The missing layer is the only layer that really matters - the customer. Ensuring that your application can actually be consumed - that delivery can be successful - is a critical part of providing your value. Your application’s facilities, network, and storage may be running properly, but will your customers actually benefit? Without a properly staffed, trained, equipped, and managed operations team, your service won’t last long enough for customers to care. If your customer is important, then so is your operations team. ...

As of Februrary 2011 AWS S3 has been able to serve static websites, giving you superior availability for unchanging (or seldom-changing) content. But most websites today are not static; dynamic elements drive essential features such as personalized pages, targeted advertisements, and shopping carts. Today’s release from AWS CloudFront: Support for Dynamic Content alleviates some of the challenge of running dynamic websites. You can now configure a custom set of URL patterns to always be passed through to the origin server. This allows you to “poke holes” in the CDN cache for providing dynamic content. ...

Reading AWS’s recent announcement of the AWS Marketplace you would think that it provides a catalog of click-to-deploy, highly-available, scalable applications running on EC2. You’d be partially right: the applications available in the AWS Marketplace are deployable in only a few clicks. But highly-available and scalable services will be difficult to build using Marketplace images. Here’s why. Essential Ingredients of HA and Scalability on AWS AWS makes it easy to run scalable, HA applications via several features. Not all applications use all of these features, but it would be very difficult to provide scalable and highly available service without using at least one of these: ...

Today I presented at the Enterprise Cloud Summit at the Interop conference. The talk was officially entitled Ten Cloud Design Patterns, but because my focus is on the application, I re-titled it. And I mention more than ten patterns, hence the final title Many Cloud App Design Patterns. I explore a number of important issues for cloud applications. Application state and behavior must both be scaled. Availability is dependent on MTTR and MTTF - but one of them is much more important than the other in the cloud. Single Points of Failure are the nemesis of availability, and I walk through some typical patterns for reducing SPOFs in the cloud. ...

The need for cloud provider price transparency. What is a workload and how to move it. “Open"ness and what it means for a cloud service. Various libraries, APIs, and SLAs. These are some of the engaging discussions that developed at the Platforms and Ecosystems “Birds of a Feather”/“Unconference”, held on Tuesday evening March 8th during the CloudConnect 2011 conference. What about the BOF worked? What didn’t? What should be done differently in the future? Below are some observations gathered from early feedback; please leave your comments, too. ...