On Aug 9, 2007, at 8/93:18 PM , Tomi N/A wrote:
2007/8/9, Joe Baldwin <[EMAIL PROTECTED]>:
Things change very quickly in the OpenSource world so perhaps I could
have made a mistake, however, I don't think that I am that far off
the mark. Is there a white paper that might discuss the differences
(couldn't find one at the Hibernate site)? Does anyone have an
opinion?
It's hard to compare the two seeing as most people use one or the
other.
I use cayenne in my projects: I didn't know much about cayenne or
hibernate when I chose (2-3 years back).
At the moment, I'm considering using hibernate in (at least) some of
my applications because I've run into scalability issues I couldn't
find a satisfactory solution for: I need to process tens of thousands
of objects in memory so that I can generate reports. I got less than
satisfactory results with cayenne, but I see hibernate has at least
some (declarative support for large datasets:
Hm... I recently wrote an app that involved processing large numbers
of rows
(to the tune of about 250,000 currently, and sure to increase rapidly).
Granted, I had to code a little more carefully... create "throw away"
data contexts
for some operations, etc. But the app runs quite nicely with cayenne.
What performance issues did you encounter?
http://www.hibernate.org/hib_docs/reference/en/html/batch.html
http://www.hibernate.org/hib_docs/entitymanager/reference/en/html/
batch.html
Also, the modeler provides rather limited functionality when updating
(rather than regenerating) a mapping which is a fairly common
operation in my environment.
Hm, I'm going to assume that you're referring to updating an existing
database schema that already has data in it?
I'm curious if hibernate has some solution to this problem?
Don't get me wrong: if I wanted to list cayennes strong points, the
list would be very long, starting or finishing with probably the best
spirited community I've had the pleasure to be a part of. It's just
that in my case I ran into issues hibernate seems to address
explicitly, like the huge datasets I mentioned. Don't know if I'll run
into a wall with hibernate, as well. Maybe I'll miss ROP or
something...
Anyway, enough from me.
Cheers and thumbs up to the people making cayenne what it is!
t.n.a.
