Hi Pete and folks, pete@ziu.net wrote:
I read the current architecture draft ogsa-d-wg has up on their site, and there appears to be no conflicts. They do mention non-master replication in the context of "peer-to-peer". I refered to these a little differently in terms of "push", "pull", and "bi-directional".
That's excellent to find there is not conflicts between the specs. Then, we can review what is potentially missing in our spec. Let's see the diagram Sachiko will post to think about this.
Mike, did you find the use cases up on ogsa-d or just through communications with Steven? I am working to continue to add detail to the replication presentation. I am attempting to define a "ReplicaElement" structure which will have properties of a unique instance id, replica id, the actual value of the data, modification and author history, and security constraint data. This one structure should be able to be used to represent a piece of data, a collection, a graph (tree), and a database, for a collection of replicas. Hopefully I can get this out before ogsa face2face to help stimulate the replication topics.
It's good to make sure our spec. doesn't conflict with the data architecture replication. Pete, if you can drill down this a little bit more it will surely be of help to us. You may be able to talk with someone from ogsa-data team at the F2F. Though I see the value of the data replication use case, I think that it is best to leave the detailed normative description for the post version 1. I'm still aiming for the first spec to be submitted at GGF15. To do so, we need to have closure on the draft well ahead of Oct. I think we should be focusing on making this deadline. Designing the ACS dedicated interface for data replication will inevitably involve a lot of work, including review of existing products. Considering that there are bunch of famous data replication products in the market, including SRDF from EMC, and embedded features in the RDBMs, we may not be able to design efficient interface for it. We have plenty of time after version 1 is out to do this. Let's discuss at the call about what we can do for our first draft. -Keisuke