Thread: Best strategy for metadata management for Kobo using Calibre?
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Old 04-24-2019, 04:40 AM   #14
davidfor
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Posts: 24,905
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Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
Quote:
Originally Posted by ceridwen View Post
For my personal AO3 library, after I stripped all the rating, warning, category, and character tags, there are more than 6000 distinct tags. Canonicalizing them reduces this to more than 5000. Dropping tags that only appear once reduces this to 1277 tags, which is still probably too many collections for a Kobo to handle, I'm assuming? I'm going to look at how much I lose by starting to less-frequent tags, though I'm curious if anyone has other ideas for reducing the number of tags with minimal loss of information.
1277 collections is probably to many. At the least, it is probably impractical. Looking at my Clara HD, it has 10 collections per page. That would mean 128 pages of collections. I would never page through that. The sorting of size and date created might help, but, again, to many to be practical.

Performance is a separate issue. I haven't loaded a lot of collections for a while (I'm at four pages at the moment). But, the performance tends to be related as much to the number of books in the collections, as to the number of collections. By that I mean adding a collection with 500 books in it, will have a bigger impact than adding ten collections with 10 books in each.

This is with recent firmware. There was major fix to collection management some time last year. There was a point where I had about 40 pages of collections and it took over a minute to open the collections list. And I added a single collection with about 1000 books on it and it went to over 2 minutes to open the list. I supplied this to Kobo and they were able to find the issue. The latter came down to about 10 seconds.
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