On Apr 30, 2007, at 12:21 PM, Jan van Wijk wrote: >> I found three things improved performance substantially >> on Mac OS X/Power Mac G5: >> - turn off automatic XMP updates >> - pre-build standard and 1:1 previews >> - turn off the automatic deletion of previews > > I have those setting now too. > > At one point I did enable 'automatic XMP' updates and I experienced > quite slow responses, perhaps mostly due to 'touching' DNG's that > had been changed before and got the XMP info updated but > quite annoying anyway.
When you enable Automatic XMP updating, Lightroom will run through and touch every file in the library, updating the metadata with any and all changes. After that, LR will constantly synchronize metadata from its database to the actual files. Whether you're adding keywords, cropping, doing tonal adjustments, etc, all of these changes are stored in the metadata as you go along so it gets into quite a bit of library to file back and forth. > However, I guess it does mean that I need to 'export' DNG's if I want > to use them elsewhere and retain any settings right ? If you have the Automatic XMP updating turned off and want to access those same files in place, say with Bridge and ACR, go to the folder you want to edit in, select Library/Grid mode, select all the files, and choose the "Metadata->XMP->Export XMP Metadata To Files" command. Lightroom will force all the metadata to be updated. You can then quit Lightroom and open a view on that folder with Bridge. Both Bridge and Camera Raw 2.7 will read and interpret the metadata properly. If you make changes on files in that folder with Bridge and Camera Raw, when you restart Lightroom and go to that folder, select all the files and use the complementary 'Import XMP Metadata From Files' command (same submenu). That will refresh LR's database with the latest settings. You should also do this if you have the same folders in two different Lightroom libraries. For other applications beyond Bridge/Camera Raw/Photoshop, the same thing will apply. You can always Export a DNG too: Lightroom will embed all the current metadata settings at the time of export unless you turn off metadata embedding. > Have you done that sofar, or are you just using that single system ? I do combinations of the above as I occasionally use Bridge to run some scripted outputting, but generally have my files organized in the file system such that they are in separate Lightroom libraries so I don't get into the "which set of Lightroom edits is the correct, current one". > Just copying the DNG from the filesystem woyld be the version as > original imported by Lightroom I guess (converted from camera PEF). Yes, unless you have forced a metadata export as above. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
