shawn_moore's profile

10 Messages

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188 Points

Tue, Aug 16, 2011 9:48 PM

Lightroom: If I trash all the old backup folders is it going to affect my catalog in any way?

In Lightroom 3 if you trash all the old backup folders is it going to effect the your catalog in any way? there are 61 backup folders in my lr catalog 61 seems redundant . It eats up a lot of space "162.91 GB on disk ". And yes I optimize my cat regularly.

Responses

Official Solution

Employee

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166 Messages

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3K Points

10 y ago

To answer the question simply, each catalog LR creates is independently valid, so deleting a backup lrcat file will not impact the original from which it was created.

However, the fact that 61 backup folders total 162.91 GB on disk seems suspicious. That would be an average size of 2.5 GB. Is your primary lrcat file (not the Previews.lrdata folder/package next to it) in that ballpark? I'm guessing it'd be somewhat larger, since the backups have probably been getting bigger as the catalog grows (and the average is brought down by the earlier, smaller ones).

I ask because for all the catalogs I've seen, only a small handful are over 2 GB. One reason for the backups folder to be that big is that you've accidentally opened one of them and started using it so that it has built up a large preview cache.

If that's the case it explain the size, and it'd make that the advice of deleting them all be a bad data loss mistake.

Champion

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2.6K Messages

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33.7K Points

10 y ago

Backups are just files, so they don't tie to your catalog and can be deleted when you feel you don't need them, anymore, if that's what you meant by saying "all old backups". But if you means "all backups" then that would not be a good idea since w/o a backup, if your catalog becomes corrupted for any number of reasons you could lose everything.

I usually keep the last few in case I don't discover the corruption right away and then a few back in time increasing the time period between, but remove most of the older ones.

For example, if I do a backup every week, I try to keep, a months worth of weekly backups, 6 months worth of monthly backups, and then one every year, and one whenever I upgraded LR last. And a few more at important stages when I might have completed an important event or trip.

I actually archive older photos and create a catalog containing their settings and then delete those photos out of my working catalog, so it's important to have a few catalogs back in time in case something happens to the archived catalogs.

231 Messages

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4K Points

10 y ago

Shawn,

Besides the discussion about how big your .lrcat files are:

It is a personal decision how many backup copies of a catalog one feels are needed to recover from corruption, but also maybe from accidentally removed images and such.

If you don't want to throw too many old copies away, you can always build ZIP archives of the backup folders. Catalogs zip really well, I notice an average of only 5% of the original size when using .zipx format.

Beat

513 Messages

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11.1K Points

10 y ago

Shawn,

Beat beat (sic :)) me to suggesting to compress your backup catalogs. The reduction can be substantial (e.g., 90% less space required).

On Windows you can also set your Backup folder to "Compress contents to save disk space". This amounts to an automatic compression without the need to deal with ZIP files manually.

10 Messages

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188 Points

10 y ago

My catalog has 463525 photos since creating a new cat March 1 of 08.
the LRcat is 5.02 GB on disk run on a separate hard on my main machine.
The preview are what eats up the most space "Previews.lrdata 387.99 GB on disk "
I need them to access the images fast I can't wait for rerendering of a shoot of a 1000 images. I wanted to see of the trashing preview folders effects the the catalog.