Library Size

Hi,
I was hoping to reduce the size of my library by relocating masters to DVDs.
After some tests here are some numbers I got:
Original Library Size with Consolidated Masters: 100%
After relocating masters it shrunk to: 39%
After deleting previews it shrunk a bit more to: 30%.
Is there some way of reducing that 30% even more ? What is contained in that 30% now that masters are out and previews are deleted ?
Thank you.
MBP 2.0 Mac OS 10.4.9 Mac OS X (10.4.5)

There are still thumbnails stored in the Library, otherwise you wouldn't be able to see anything without the DVDs being in the drive. But from the percentages, it wounds like either your originals are JPEGs (and the thumbnails are therefore relatively large in comparison), or not all of the Previews have been deleted.
Ian

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I have archived my full library to DVD and deleted all items. Finder still shows the library size at 1.24 GB! Inside I find it is not cache, nor thumbnails that take this space, but rather orinals which I have deleted before. Please see the screenshots showing the library, its size, size of the originals folder.
http://img169.imageshack.us/img169/1261/picture16vg.png
http://img169.imageshack.us/img169/5755/picture22ql.png
http://img169.imageshack.us/img169/9955/picture32bj.png
In other words, deleting photos from library may not always lead to deleting the actual photos from disk, even if the trash in the library is emptied! In my opinion this is a bug and leads to unnecessary orphans and size bloat on disk. What do you think?
Also when burning the archive iPhoto library showed 3.2 GB from within iPhoto, it showed 5.19 GB in finder and when I was burning it on a DVD the size showed 3.9 GB!!
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Where are you reading the library size?
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In the Finder, the size of the iPhoto Library Folder is the total Originals, totla Modifieds, thumbnails and database files.
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Message was edited by: unleashed

Thanks everyone for their help. Redoing the previews helped. I think I had the previews set to "do not limit" on my dekstop and had just pulled the aperture library to my laptop. Redoing those previews took 20GB off my library size.
I see where you're coming from with the referenced images, but for now, it just keeps things simpler for my to keep it all managed. It's a brilliant solution though, if I need to in the future I might go that route. Especially when you think about possibilities with having the referenced images on Time Capsule or something. I don't take that many photos, and I upgrade my computer every year or two. I'm hoping the laptop hard drive space will expand gradually with my photo and music library, and by the time I have to worry about it, there will be another solution.
As far as how I went from Aperture to iPhoto (Ernie), I did (from iPhoto) file > show aperture library > then pulled them all in. I know there are issues with this though, you might check the iPhoto forum if you have trouble, there are work-arounds I believe.

Huge Library Size!

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The unanswered questions here are: what are the sizes of your originals and how many do you have? If you have a lot of relatively small (in megapixels) JPEG files in you iPhoto library then you are not going to see a very small Library size. If you look in the Aperture Library package file you will see many housekeeping files are used to keep the necessary information for your images. Aperture does generate large thumbnails which I think are around 1000 pixels at the long dimension. You cannot turn these large thumbnails off. Then Aperture maintains additional files that keep the Keyword and Metadata information. Files are needed to keep track of what project each file is associated with, as well as any albums, etc.
You may see more of a difference with your XTi when you start shooting RAW because the ratio of RAW file size to the thumbnail size will be greater.
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3) Click on the dropdown box and change the word "Offline" to "Managed".
4) Make sure the "Ignore stack groupings" checkbox is checked.
More interesting info related to your questions can be found on the Bagelturf website, a website chock full of usefull Aperture info:
http://homepage.mac.com/bagelturf/aparticles/library/library.html
http://homepage.mac.com/bagelturf/aparticles/previews/previews.html
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