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List: kde-edu
Subject: Re: Replacing file-system by database in KStars
From: Tomaz Canabrava <tcanabrava () kde ! org>
Date: 2014-01-28 19:23:33
Message-ID: CACk01_zrrqVspV+eU8bnV8G03cxFYhF3SiuA6C29oFMQwyg2xg () mail ! gmail ! com
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A Database is better than the HDF5 approach?
HDF5 is designed to be a very fast file format for scientific data, kstars
falls into that category.
On Tue, Jan 28, 2014 at 7:03 AM, Vijay Dhameliya
<vijay.atwork13@gmail.com>wrote:
> Hi
>
> Thank you very much Macro for giving clue of the way to do it. I agree
> with you that plan and diagram for workflow is must. I shall first plan and
> start preparing diagram of database structure for KStars.
>
> I will soon prepare rough diagram of flow and share with you so you can
> give your suggestion and so on. And we can improve it to level best as
> KStars team give suggestions.
>
> BTW I have good experience with development of Database Managment in Qt
> and I hope it will help us here :)
>
>
> On Tue, Jan 28, 2014 at 2:14 PM, Marco Calignano <
> marco.calignano@gmail.com> wrote:
>
>> HI!
>>
>> I also think a database is a better approach than a file base system. But
>> you didn't address the first and biggest think to do. Before you can start
>> coding you should really plan your database.
>> To create a database it is a real big work. You need to plan in advance
>> even for feature are not at the horizon yet. If you plan it correctly you
>> can then include localization as well.
>> I was thinking to jump on KStar to help, so maybe this is my cue. I will
>> have to learn how the data are structured and I can help with the database
>> development. But I would like to see some diagram here in the Kde-Edu list.
>> So that all the KStar team can also have a look and give their opinion.
>>
>> Cheers
>> Marco
>>
>>
>> On Tue, Jan 28, 2014 at 4:39 AM, Alexander Wolf <alex.v.wolf@gmail.com>wrote:
>>
>>> Hi!
>>>
>>> 2014-01-28 Vijay Dhameliya <vijay.atwork13@gmail.com>
>>>
>>> Currently when KStars is launched, it reads data corresponding to
>>>> different Skyobject from respective file in loaddata() methods. And I have
>>>> tracked out all the classes where we are loading data by reading file.
>>>>
>>>> I researched bit on the topic and I found that loading data from
>>>> database is always much better option then doing same from file.
>>>>
>>>> If we replace file system with QSql following are the Pros:
>>>>
>>>> 1) We will not have to ship so many files with Kstars
>>>> 2) Loading from database is quicker than doing same from file
>>>> 3) Code for load methods will be reduced in size
>>>>
>>>> Cons:
>>>> 1) I will have to move all data from files into database by temporary
>>>> methods
>>>>
>>>> So I am planning to start coding to replace file system by database on
>>>> my local branch.
>>>>
>>>> Can you please give your views and suggestion regarding the same ? I am
>>>> sure that It will be very helpful to me. :)
>>>>
>>>
>>> What about localization support for strings (like names of DSO) from
>>> those files?
>>>
>>> --
>>> With best regards, Alexander
>>>
>>> _______________________________________________
>>> kde-edu mailing list
>>> kde-edu@mail.kde.org
>>> https://mail.kde.org/mailman/listinfo/kde-edu
>>>
>>>
>>
>>
>> --
>> Life is short, so learn from your mistakes
>> And stand behind, the choices that you make
>>
>> Face each day with both eyes open wide
>> And try to give don't keep it all inside
>>
>> Dream Theater
>>
>>
>> _______________________________________________
>> kde-edu mailing list
>> kde-edu@mail.kde.org
>> https://mail.kde.org/mailman/listinfo/kde-edu
>>
>>
>
> _______________________________________________
> kde-edu mailing list
> kde-edu@mail.kde.org
> https://mail.kde.org/mailman/listinfo/kde-edu
>
>
[Attachment #5 (text/html)]
<div dir="ltr"><div>A Database is better than the HDF5 approach?<br></div><div>HDF5 \
is designed to be a very fast file format for scientific data, kstars falls into that \
category.<br></div></div><div class="gmail_extra"><br> <br><div \
class="gmail_quote">On Tue, Jan 28, 2014 at 7:03 AM, Vijay Dhameliya <span \
dir="ltr"><<a href="mailto:vijay.atwork13@gmail.com" \
target="_blank">vijay.atwork13@gmail.com</a>></span> wrote:<br><blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"> <div dir="ltr">Hi<div><br></div><div>Thank you very much \
Macro for giving clue of the way to do it. I agree with you that plan and diagram for \
workflow is must. I shall first plan and start preparing diagram of database \
structure for KStars. </div>
<div><br></div><div>I will soon prepare rough diagram of flow and share with you so \
you can give your suggestion and so on. And we can improve it to level best as KStars \
team give suggestions.</div><div><br>BTW I have good experience with development of \
Database Managment in Qt and I hope it will help us here :)</div> <div><div \
class="h5"> <div><br></div><div class="gmail_extra"><br><div class="gmail_quote">On \
Tue, Jan 28, 2014 at 2:14 PM, Marco Calignano <span dir="ltr"><<a \
href="mailto:marco.calignano@gmail.com" \
target="_blank">marco.calignano@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"><div dir="ltr">HI!<div><br></div><div>I also think a database \
is a better approach than a file base system. But you didn't address the first \
and biggest think to do. Before you can start coding you should really plan your \
database.</div>
<div>To create a database it is a real big work. You need to plan in advance even for \
feature are not at the horizon yet. If you plan it correctly you can then include \
localization as well. </div><div>I was thinking to jump on KStar to help, so maybe \
this is my cue. I will have to learn how the data are structured and I can help with \
the database development. But I would like to see some diagram here in the Kde-Edu \
list.</div>
<div>So that all the KStar team can also have a look and give their \
opinion.</div><div><br></div><div>Cheers</div><div>Marco</div><div \
class="gmail_extra"><br><br><div class="gmail_quote"><div><div>On Tue, Jan 28, 2014 \
at 4:39 AM, Alexander Wolf <span dir="ltr"><<a href="mailto:alex.v.wolf@gmail.com" \
target="_blank">alex.v.wolf@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px \
#ccc solid;padding-left:1ex"><div><div><div dir="ltr">Hi!<br><div \
class="gmail_extra"><br><div class="gmail_quote">2014-01-28 Vijay Dhameliya <span \
dir="ltr"><<a href="mailto:vijay.atwork13@gmail.com" \
target="_blank">vijay.atwork13@gmail.com</a>></span><div>
<div><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
solid;padding-left:1ex"><div dir="ltr">Currently when KStars is launched, it reads \
data corresponding to different Skyobject from respective file in loaddata() methods. \
And I have tracked out all the classes where we are loading data by reading file. \
<div><br></div><div>I researched bit on the topic and I found that loading data from \
database is always much better option then doing same from file. \
</div><div><br></div><div>If we replace file system with QSql following are the \
Pros:</div>
<div><br></div><div>1) We will not have to ship so many files with \
Kstars</div><div>2) Loading from database is quicker than doing same from \
file</div><div>3) Code for load methods will be reduced in size</div><div><br></div>
<div>Cons:</div><div>1) I will have to move all data from files into database by \
temporary methods </div><div><br></div><div>So I am planning to start coding to \
replace file system by database on my local branch. </div><div>
<br></div><div>Can you please give your views and suggestion regarding the same ? I \
am sure that It will be very helpful to me. \
:)</div></div></blockquote><div><br></div></div></div><div>What about localization \
support for strings (like names of DSO) from those files?</div>
<div><br></div><div>--</div><div>With best regards, Alexander \
</div></div></div></div> \
<br></div></div><div>_______________________________________________<br> kde-edu \
mailing list<br> <a href="mailto:kde-edu@mail.kde.org" \
target="_blank">kde-edu@mail.kde.org</a><br> <a \
href="https://mail.kde.org/mailman/listinfo/kde-edu" \
target="_blank">https://mail.kde.org/mailman/listinfo/kde-edu</a><br> \
<br></div></blockquote></div><span><font color="#888888"><br><br \
clear="all"><div><br></div>-- <br><div>Life is short, so learn from your mistakes \
</div><div>And stand behind, the choices that you make </div> \
<div><br></div><div>Face each day with both eyes open wide <br> </div><div>And try \
to give don't keep it all inside </div><div><br></div><div> \
Dream Theater</div><div><br></div> </font></span></div></div>
<br>_______________________________________________<br>
kde-edu mailing list<br>
<a href="mailto:kde-edu@mail.kde.org" target="_blank">kde-edu@mail.kde.org</a><br>
<a href="https://mail.kde.org/mailman/listinfo/kde-edu" \
target="_blank">https://mail.kde.org/mailman/listinfo/kde-edu</a><br> \
<br></blockquote></div><br></div></div></div></div> \
<br>_______________________________________________<br> kde-edu mailing list<br>
<a href="mailto:kde-edu@mail.kde.org">kde-edu@mail.kde.org</a><br>
<a href="https://mail.kde.org/mailman/listinfo/kde-edu" \
target="_blank">https://mail.kde.org/mailman/listinfo/kde-edu</a><br> \
<br></blockquote></div><br></div>
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kde-edu mailing list
kde-edu@mail.kde.org
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