Importing Calibre Libraries, metadata.opf disappears

GalacticHull · 12-21-2016, 08:20 AM

I recently merged 8 calibre libraries into one. The merged library contains about 26,000 titles, yet the OPF was only imported for 5,188 of the titles.

Looking at the seperate libraries, which I still have and use, I find all the metadata.opf files are right there where they should be. All of them.

How do 21,000 metadata.opf files get lost copying from one library to another?

And is there a fix?

GalacticHull · 12-21-2016, 08:28 AM

This may be partially solved. I now notice in library maintenance I can "write' the opf files.

Assuming this works, is it a task I'll have to do whenever I copy to the large, full library from the smaller, more manageable libraries?

kovidgoyal · 12-21-2016, 08:56 AM

metadata.opf is a backup mechanism, it will be regenerated automatically as time passes.

theducks · 12-21-2016, 09:34 AM

to see the queue of the outstanding backing up metadata:
click the Library Icon : Library Maintenance: ... status (the first item)
this clears fairly briskly for small quantities of (metadata) changes (adding books is a change

), so seeing a 0 is not unusual. For larger batches, you will see it count down.

GalacticHull · 12-21-2016, 11:22 AM

Quote:

Originally Posted by kovidgoyal

metadata.opf is a backup mechanism, it will be regenerated automatically as time passes.

Excellent. Was wondering why some were there, but not all. Thank you.

BetterRed · 12-21-2016, 01:04 PM

Quote:

Originally Posted by GalacticHull

Excellent. Was wondering why some were there, but not all. Thank you.

Regenerating the opf's for 26,000 books can take a while because it runs at very low priority - for me its about 50-80/minute.

The calibredb --backup-metadata command can be used to force re-generation of the OPF files, it should only take a minute or two to do 26,000. See ==>> Calibre calibredb command line program

Before using it close the library manager program and, if its running, the calibre server.

BR

12-21-2016, 08:20 AM	#1
GalacticHull Enthusiast Posts: 30 Karma: 10 Join Date: Nov 2014 Device: kobo h2O	Importing Calibre Libraries, metadata.opf disappears I recently merged 8 calibre libraries into one. The merged library contains about 26,000 titles, yet the OPF was only imported for 5,188 of the titles. Looking at the seperate libraries, which I still have and use, I find all the metadata.opf files are right there where they should be. All of them. How do 21,000 metadata.opf files get lost copying from one library to another? And is there a fix?

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12-21-2016, 08:28 AM	#2
GalacticHull Enthusiast Posts: 30 Karma: 10 Join Date: Nov 2014 Device: kobo h2O	This may be partially solved. I now notice in library maintenance I can "write' the opf files. Assuming this works, is it a task I'll have to do whenever I copy to the large, full library from the smaller, more manageable libraries?

12-21-2016, 08:56 AM	#3
kovidgoyal creator of calibre Posts: 43,850 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	metadata.opf is a backup mechanism, it will be regenerated automatically as time passes.

12-21-2016, 09:34 AM	#4
theducks Well trained by Cats Posts: 29,795 Karma: 54830978 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	to see the queue of the outstanding backing up metadata: click the Library Icon : Library Maintenance: ... status (the first item) this clears fairly briskly for small quantities of (metadata) changes (adding books is a change ), so seeing a 0 is not unusual. For larger batches, you will see it count down.