Hi Andrew,we are currently setting up a Fedora 3 repository. The main reason we choose Fedora over other systems is its flexibility at storing data streams. The problem we are facing is that due to the size (and legacy system dependencies) we simply can not just move all digital objects over to the new Fedora system. The plan (so far) is to develop a custom storage layer that maps our legacy systems storage into Fedora.
So the questing is: Given Fedora 4 brings up a complete new storage system, does it at all make sense to put effort in developing Fedora 3 storage layer components? Is this a good idea anyway?
Best regards! Ralf On 09/26/2013 04:24 AM, Andrew Woods wrote:
Hello Stefano,I would like to say that you should begin your project with Fedora 4. However, the fact is that on the one hand Fedora 4 is still working towards a beta release, and on the other, a very solid Fedora 3.7 has just been released.If it is not already perfectly clear, one of Fedora 4's main priorities is to ensure a simple content and application upgrade process for Fedora 3 installations to Fedora 4. Using Fedora 3 with Akubra will not be a barrier to subsequently upgrading to Fedora 4.Regards, AndrewOn Wed, Sep 25, 2013 at 2:50 PM, Stefano Cossu <sco...@artic.edu <mailto:sco...@artic.edu>> wrote:Hi Andrew, Thanks for your clarification and your graph. Would then Akubra become redundant in this scenario? The main reason I am asking this is that I'm debating whether to start a new project with Fedora 3 or 4 (and storage is one of the main points in my choice). If I start with F3 and Akubra, I am wondering if when I upgrade to F4 at some point in time I would have a harder time transitioning to Infinispan with Akubra in the way. Thank you, and thanks for keeping the Fedora Futures Wiki up to date! Stefano Cossu Director of Application Services, Collections The Art Institute of Chicago 116 S. Michigan Ave. Chicago, IL 60603 312-499-4026 <tel:312-499-4026> On 9/25/13 12:27 PM, Andrew Woods wrote:Hello Stefano, Thanks for probing into Fedora 4. It may be worth clarifying the fact that Fedora 4 represents an architectural shift from a custom-developed, ten-year-old software application to a new software stack as depicted in the attached document. You are correct in drawing an analogy between the storage layer options of Fedora 3 and the role of Infinispan in Fedora 4. Fedora 4 adds the preservation and access sensibilities that are important to the Fedora community to the vanilla ModeShape [1] JCR implementation. Optimizing for the ability to cluster and for performance, the recommended storage configuration of ModeShape is to layer over Infinispan [2]. Infinispan, itself, has a number of persistence store options available including simple filesystem and a range of databases. Based on a variety of Fedora installation profiles and use cases, we will be providing Fedora4/ModeShape/Infinispan configuration "recipes" which will take the guess-work out of how to get to an efficient configuration of your repository. Regards, Andrew [1] https://docs.jboss.org/author/display/MODE/Home [2] http://infinispan.org/docs/5.3.x/user_guide/user_guide.html On Wed, Sep 25, 2013 at 11:18 AM, Stefano Cossu <sco...@artic.edu <mailto:sco...@artic.edu>> wrote: Hi there, I have heard a lot of buzz around the new storage layer based on Modeshape and Infinispan in Fedora 4. Not being very confident with Fedora's inner workings, nor with JCR itself, I'm wondering how this is related to the Fedora 3.x legacy filesystem and Akubra storage engines. Is Modeshape/Infinispan meant to be an alternative or replacement for these engines? Or do they work alongside with different purposes? Some explanation would be appreciated. Thanks, -- Stefano Cossu Director of Application Services, Collections The Art Institute of Chicago 116 S. Michigan Ave. Chicago, IL 60603 ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. 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