What is finished?
- Jürg took all database code out of the indexer. The indexer is now a consumer of tracker-store like any other. It commands tracker-store to store metadata. The indexer now also queries tracker-store for things like the modification time. Currently it has no access to the database directly. This might change, for performance reasons, we’re not sure about that yet.
- The trackerd process got renamed to tracker-store.
- The DBus object in tracker-store now executes the SPARQL Update requests itself. It used to send this request to tracker-indexer.
- Jürg moved the watching and crawling code that used to be in the daemon to the indexer. This means that tracker-store doesn’t depend on inotify anymore. This work made it possible to make your own indexer or not to have an indexer at all. This was quite a big task and got pushed today. This is of course being tested as we speak.
- I wrote an internal API to queue database store requests, making it possible to asynchronously deal with large amounts of data when multiple metadata deliverers will be giving tracker-store commands to store their metadata.
- I also ported existing code to use this internal API. This task item is ongoing and being tested. For example the Turtle Import, support for removable device caches in Turtle, Push modules (support for E-mail clients) and the DBus SPARQL Update API are affected by this.
- The class signals feature, which now doesn’t require involvement of the indexer, got fixed.
What is left to do?
Right now the indexer will instruct an extractor process to extract metadata from a file. This extractor process communicates the metadata first to the indexer, which in turn communicates the same metadata to tracker-store. This can be done more efficient by letting the extractor communicate the metadata directly to tracker-store.
We also have quite a few other plans for the indexer’s code. Such plans are a bit less short term planning. For example splitting support for the removable devices and the normal filesystem into two processes.