Hi Avi, Avi Revivo ha escrito:
Hi All,
A team in my development group is currently using a proprietary container with a functionality similar to the MultiIndexContainer except for an additional feature of using Memory Mapped File to store the container data. The proprietary container performance is poor with ot without using the mapped file. The memory mapped file feature is extermly important since the component must keep the entire state even if the system crushes.
Inorder for them to use the Multi Index container they need some persistence feature. Serializing the container every 2 seconds or so is not possible since the container size will be too large (dozens of MB).
Is there any solution or future plans to develop such a feature in the Multi Index Container and in other boost containers?
I'm extremely glad you asked this question :) because the Boost 1.35 version of Boost.MultiIndex features full integration with Boost.Interprocess allocators, thus making multi_index_containers placeable in memory mapped files. This is shown in example 12 at the examples section of the docs: http://svn.boost.org/svn/boost/branches/release/libs/multi_index/doc/example... Boost 1.35 should be shipping real soon now. If your team decides to migrate to B.MI, I'd love to know whether the process goes smooth. Best, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo