Notices

From patrick.ohly at intel.com Wed Sep 8 04:32:25 2010
From: patrick.ohly at intel.com (Patrick Ohly)
Date: Wed, 08 Sep 2010 13:32:25 +0200
Subject: [MeeGo-dev] data storage and indexing in MeeGo - a survey
Message-ID: <1283945545.7176.302.camel@pohly-mobl1.ikn.intel.com>

Hello!

As those who I have been pestering with questions in the past already
know, I'm trying to get an overview of which data we store in MeeGo core
and how it can be accessed and/or searched. This email is an attempt to
close some gaps and extend the list that I'll present below. I also have
some general questions around Tracker.

Typically the answer consists of a domain specific storage and API
(mkcal + sqlite) plus Tracker for indexing the data. In some cases,
Tracker is also the main storage of the data (QtContacts +
qtcontacts-tracker). Sometimes there are additional portability layers
on top of the MeeGo platform component (QtMobility Messaging on top of
the Qt Messaging Framework (QMF)).

The next question then becomes how data items are referenced at the
various levels, and how the data content is mapped. For example, can I
take the Tracker search results and open the corresponding item using
domain specific tools and APIs?

This mapping is mostly only defined in the source code which implements
the Tracker indexing. I'll provide pointers below.

Finally, how can a permanently running app be notified of data changes?

Here's what I gathered so far - please extend and/or correct.
...

Originally Posted by twaelti

One issue I have with the tracker.cfg is that there seems to be misunderstanding about the two Battery flags in it:

The config file itself and the help in the "Tracker Cfg" state that:

Code:

# Set to true to disable indexing when running on battery
BatteryIndex=false
# Set to true to disable initial indexing when running on battery
BatteryIndexInitial=false

However, the tracker.cfg man states that:

Code:

BatteryIndex=BOOLEAN
    Enable or disable indexing when on battery power. 
BatteryIndexInitial=BOOLEAN
    Enable or disable initial index sweep (i.e. the very first indexing) when on battery power.

These two statements seem to be 180° contradictory.

For me, I now have set these flags to FALSE and expect that this DISABLES indexing while ON BATTERY.

Originally Posted by vkv.raju

Can someone please tell me how to check the current version of tracker in our devices. I am running PR1.3+CSSU-Updates (latest is 13).

There is a current (hot) discussion going on at meego-dev miling list about the future of tracker. The point that came out (w.r.t tracker in maemo) is to which version we are running. Looks like we are running the 0.6.95.x version of Tracker. But their latest version is 0.10.1 and they claim that the latest version is way better than the one that maemo uses.

So, can someone please tell me how to check which version of Tracker are we running. 0.10.1 or older?

http://lists.meego.com/pipermail/mee...ch/482001.html
http://lists.meego.com/pipermail/mee...ch/481890.html (Thread start)

Thanks in advance,

Originally Posted by dsawhney

This should be the PR1.3 version - http://maemo.org/packages/package_in...-35maemo1+0m5/