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From Michael Andreasen <mich...@dunlops.com>
Subject Re: HowTo use derby at a CDC device --SavaJe Jasper S20
Date Sat, 20 May 2006 21:30:33 GMT
Hi Ove,

I've been using Derby and hsqldb under CDC 1.1 for a while now, not on 
the J20 (yet!) but using J9 on Pocket PC 2003. I have really given up on 
both of them as the memory footprint is just too big on both. You need 
to 8-16 meg on both for them to really operate properly. Nether will 
load a 20,000 row table with one index in 8 meg including your app, 
that's just doing the inserts, never mind starting to do queries!

However, I have just the other day discovered db4o... wow this is 
something else! the best bit of software I have seen since google earth. 
It's not an SQL database it's an Object database. Rather than me harping 
on about it here, take a look for yourself, it's simply amazing.


I now have my application working great, it's faster, easier and handles 
even bigger tables... and currently all in under 3 meg.

It does take a bit of getting used to, as they is no joins. But once you 
do, there is no going back!

Let me know what you think?

Ove Nordstrom wrote:
> Hi,
> I bought a SavaJe phone “Jasper 
> S20”(http://www.savaje.com/show_device.html) at JavaOne.
> It is a Java ME /CDC 1.1 phone.
> Have anyone installed derby on this device?
> HowTo do it?
> Regards,
> Ove
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