Vol. 20, No. 4,906W - The American Reporter - February 2, 2014




by Joyce Marcel
AR Correspondent
Dummerston, Vt.
January 2, 2011
Momentum
SADLY, HATE ALWAYS HAS A HOME HERE

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CAMBRIDGE, Mass. -- Free software in the cloud isn't just a nice-sounding ideal, or even an efficient way to push innovation forward. Opening the cloud also opens the path to a bountiful environment of computing for all.

Here are the steps to a better computing future.

Provide Choice

The first layer of benefits - when companies release their source code = is incremental: incorporating bug fixes, promoting value-added resellers, finding new staff among volunteer programmers.

But a free software cloud should go far beyond this.

Remember that web services can be run virtually now. When you log in to a site to handle mail, CRM, or some other service, you may be firing up a virtual service within a hardware cloud.

What Are the Chances for a Free Software Cloud?

 


Andy Oram
American Reporter Webmaster


  The five parts of this article cover:

  • Introduction: Resolving the contradictions between web services, clouds, and open source

    1. Part 1: Definitions: Clouds, web services, and other remote computing

    2. Part II: Why clouds and web services will continue to take over computing

    3. Part II: Why web services should be released as free software

    4. Part IV: Reaching the pinnacle: truly open web services and clouds

The installments appear here in order of publication, beginning with the Introduction. Past installments are also available in the order they are published at ANDY ORAM REPORTS on the drop-down menu at top left of this page.

So Web and cloud providers can set up a gallery of alternative services, trading off various features or offering alternative look-and-feel interfaces. Instead of just logging into a site such as And providing such sandboxes can also be helpful to developers in general. A developer would no longer have to take the trouble to download, install, and configure software on a local computer to do development and testing. Just log into the "sandbox" and play.

  • Google offers The Go Playground to encourage students of their Go language.

  • CiviCRM, which is a free software server (not a cloud or web service) offers a sandbox for testing new features.

  • A web service company in electronic health records, Practice Fusion, which issued an API challenge in September, is now creating a sandbox for third-party developers to test the API functionality on its platform.

    I would encourage web and cloud services to go even farther: open their own source code and provide sandboxes for people to rewrite and try out new versions.

    A CLOUD GLOSSARY

    API (Application Programming Interface): A way for outside programmers to use the data or specialized functions of a site. One definition of "web service" involves offering an API.

    Cloud: A service in which one person uses a computer owned by another in some formal, contractual manner.

    Elasticity: The ability to quickly create and divest computing resources offered by an outside provider.

    Free and open source software: Software that anyone can use, alter, and share.

    IaaS (Infrastructure as a Service): Dividing hardware resources among clients as the virtual equivalent of complete computer systems, where clients can load and run their programs.

    PaaS (Platform as a Service): Offering a programming environment to clients, who write and run programs in that environment instead of compiling them locally.

    SaaS (Software as a Service): Offering a program through the client's browser instead of having the program loaded and run from the client's disk. One definition of "web service" is synonymous with SaaS.

    Peer-to-peer: End-user computers that hold their own data and do their own processing while sharing results, instead of working through a central server.

    Source code: The original format that is manipulated to create software or other intellectual and cultural products.

    Web services: See API and SaaS.

    Let's take a moment for another possible benefit of running a service as a virtual instance. Infected computer systems present a serious danger to users (who can suffer from identity theft if their personal data is scooped up) and other systems, which can be victimized by denial-of-service attacks or infections of their own - an awkward tower of authorizations reaching right down into the firmware or hardware. In trusted computing, the computer itself checks to make sure that a recognized and uncompromised operating system is running at boot time. The operating system then validates each application before launching it.

    Trusted computing is byzantine and overly controlling. The hardware manufacturer gets to decide which operating system you use and, through that, which applications you use.

    Wouldn't users prefer to run cloud instances that are born anew each time they log in? That would wipe out any infection and ensure a trusted environment at the start of each session without cumbersome gatekeeping.

    Loosen the Bonds on Data

    As we've seen, one of the biggest fears keeping potential clients away from web services and cloud computing is the risk entailed in leaving their data in the hands of another company. Here it can get lost, stolen, or misused for nefarious purposes.

    But data doesn't have to be stored on the computer where the processing is done, or even at the same vendor. A user could fire up a web or cloud service, submit a data source and data store, and keep results in the data store.

    IaaS-style cloud computing involves encrypted instances of operating systems, and if web services did the same, users would automatically be protected from malicious prying. There is still a potential privacy issue whenever a user runs software on someone else's server, because it could skim off private data and give it to a marketing firm, law enforcement or competitor.

    Alert web service vendors such as Google know they have to assuage user fears of locked-in data. In Google's case, they created a protocol called the Data Liberation Front (see an article by two Google employees, The Case Against Data Lock-in). This will allow users to extract their data in a format that makes it feasible to reconstitute it in its original format on another system, but it doesn't actually sever the data from the service, as I'm suggesting.

    A careful client would store data in several places (to guard against loss in case one has a disk failure or other catastrophe). The client would then submit one location to the web service for processing, and store the data back in all locations, or store it in the original source and then copy it later - after making sure it has not been corrupted.

    A liability issue remains when calculation and data are separated. If the client experiences loss or corruption, was the web service or the data storage service responsible? A ping-pong scenario could easily develop, with the web services provider saying the data storage service corrupted a disk sector, the data storage service saying the web service produced incorrect output, leaving the confused client furious and with no recourse.

    This could perhaps be solved by a hash or digest, a very stable and widely-used practice used to ensure that any change to the data, even the flip of a single bit, produces a different output value.

    A digest is a small number that represents a larger batch of data. Algorithms that create digests are fast but generate output that's reasonably unguessable. Each time the same input is submitted to the algorithm, it is guaranteed to generate the same digest, but any change to the input (through purposeful fiddling or an inadvertent error) will produce a different digest.

    The web service could log each completed activity, along with the digest of the data it produces. The data service writes the data, reads it back, and computes a new digest. Any discrepancy signals a problem on the data service side, which it can fix by repeating the write.

    In the future, if data is corrupted but has the original digest, the client can blame the web service, because the web service must have written corrupt data in the first place.

    Sascha Meinrath, a wireless networking expert, would like to see programs run both on local devices and in the cloud. Each program could exploit the speed and security of the local device but reach seamlessly back to remote resources when necessary, rather like a microprocessor uses the local caches as much as possible and faults back to main memory when needed.

    Such a dual arrangement would offer flexibility, making it possible to continue work offline, keep particularly sensitive data off the network, and let the user trade off compute power for network usage on a case-by-case basis. (Wireless use on a mobile device can also run down the battery real fast.)

    I should touch on another trend that some developers hope will free users from proprietary cloud services: peer-to-peer systems. The concept behind peer-to-peer is appealing and have been gaining more attention recently: individuals run servers on their systems at home or work and serve up the data they want. But these are hard to implement, for reasons I laid out in two articles, From P2P to Web Services: Addressing and Coordination and From P2P to Web Services: Trust.

    Running your own software is somewhat moot anyway, because you're well-advised to store your data somewhere else in addition to your own system. So long as you're employing a back-up service to keep your data safe in case of catastrophe, you might as well take advantage of other cloud services as well.

    I also don't believe that individual sites maintained by individuals will remain the sources for important data, as the peer-to-peer model postulates. Someone is going to mine that data and aggregate it - just look at the proliferation of Twitter search services. So even if users try to live the ideal of keeping control over their data, and use distributed technologies like the Diaspora Project, they will end up surrendering at least some control and data to a service.

    A Sunny Future for Clouds and Free Software Together

    The architecture I'm suggesting for computing makes free software even more accessible than the current practice of putting software on the Internet where individuals have to download and install it. The cloud can make free software as convenient as Gmail. In fact, for free software that consumes a lot of resources, the cloud can open it up to people who can't afford powerful computers to run the software.

    Web service offerings would migrate to my vision of a free software cloud by splitting into several parts, any or all of them free software. A host would simply provide the hardware and scheduling for the rest of the parts. A guest or appliance would contain the creative software implementing the service. A sandbox with tools for compilation, debugging, and source control would make it easy for developers to create new versions of the guest.

    And data would represent the results of the service's calculations in a clearly documented format. Customers would run the default guest, or select another guest on the vendor's site or from another developer. The guest would output data in the standardized format, to be stored in a location of the customer's choice and resubmitted for the next run.

    With cloud computing, the platform you're on no longer becomes important. The application is everything and the computer is (almost) nothing. The application itself may also devolve into a variety of mashed-up components created by different development teams and communicating over well-defined APIs. That's a trend I suggested almost a decade ago in an article titled Applications, User Interfaces, and Servers in the Soup.

    The merger of free software with cloud and web services is a win-win. The convenience of IaaS and PaaS opens up opportunities for developers, while SaaS simplifies the use of software and extends its reach. Opening the source code, in turn, makes the cloud more appealing and more powerful.

    The transition will take a buy-in from cloud and SaaS providers, a change in the software development process, a stronger link between computational and data clouds, and new conventions to be learned by clients of the services.

    Let's get the word out.

    Editor's Note: This is the last in Andy Oram's series on the cloud. Previous installments of this series (Introduction, and Parts 1, 2, 3 and 4) are available in the order they were published. Just go the drop-down menu at top left of this page and click on ANDY ORAM REPORTS.

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