Hello Jena developers, I know, you are working hard for the next Jena release. I just wanted to let you know that I submitted a patch two weeks ago (JENA-524) It's about a global cache that could be very useful if one's using many TDB stores in direct file mode on a single machine. At least it's very helpful for us and allows us to host more than five thousand tdb stores (containing more than a billion triples) on a classical consumer PC. The two main advantages for us are that 1. we can have concurrent write access to all the stores (what named graphs don't provide). 2. we have a relatively small read cache of approx. 500 MB with a hit rate of almost 99%. 3. Our JVM need approx. 2-3 GB of RAM for the whole system including TDB access.
We will be very glad if you decide to integrate our approach to the official release. So, if I can do something (provide further information about the idea or something else) let me know. :) Best wishes and thanks for the great piece of software you build André -- Dr. André Lanka * 0178 / 134 44 47 * http://dr-lanka.de
