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1. Re: is there an upper threshold of catalog size that shouldn't be crossed?
dj_paige Sep 3, 2009 9:25 AM (in response to BradKaye)While I have no experience with such massive amount of data in Lightroom, I can tell you that there is no upper limit built-in to the software that would prevent a catalog from operating on 300,000 images. You give us great detail about your hard drive set-up, and the speed of these drives certainly does affect catalog performance in LR, but the computer specs also affect catalog performance, and the only way to determine if it will be fast enough for you, is to try a large catalog. I also point out that processing 21mb originals (and larger) will be a source of slowness that is distinct from the size of the catalog.
I personally do not like multiple catalogs for a variety of reasons, but I am not a professional photographer. I do acknowledge that if your photographs can be split into non-overlapping sets (such as personal and work; or wedding photos vs landscape photos), then multiple catalogs certainly makes sense. Some pro photographers use one catalog per job, and other pro photographers use one large catalog.

