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Old 06-06-2015, 02:22 AM   #961
davidfor
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I seem to remember from the ancient days of school that if you re-balanced a tree it was possible for the new one to be "larger" than the source.
That's the only thing I can think of too.
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Old 06-06-2015, 12:09 PM   #962
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Quote:
Originally Posted by PeterT View Post
I seem to remember from the ancient days of school that if you re-balanced a tree it was possible for the new one to be "larger" than the source.
Sounds like a decent possibility. I ran several tests on both copies of the database and no errors or oddities popped up. It tickled my sense of humour when the "compressed" database was larger than the original.
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Old 06-17-2015, 04:28 AM   #963
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Something I played over in my mind for a while...

I have a custom column for cycles in a large series, which I want to use instead of the larger series when using the "Update Metadata on device" function. Is there an option or some trick I can use for defining which column is used other then in the code (which is rather inconvenient as I would only apply that change to this one series)?
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Old 06-18-2015, 01:48 AM   #964
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Sorry, there isn't any way to do it at the moment. Is suppose that I could add an option to the dialog to choose the series column to use. I'm a little opposed to that as then I have to work out what other attributes need to have their own columns. Is anyone else interested?

One issue with doing something like this is that you will also need to turn off the "Set Series information" option in the driver configuration. If you didn't, the next time you connect, it would be changed back to the main series column.
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Old 06-19-2015, 07:47 AM   #965
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Hm, if it isn'T that easy to do, it's no big deal, I'll use shelves then (although those are meh at best).
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Old 06-28-2015, 08:38 AM   #966
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I keep getting this problem where, when I re-upload a book I'm reading with a new version (no change in structure or metadata, just some fixes in the text, maybe styles and the odd HTML tag), the book is reset by the Kobo: it disappears from the home screen, and is listed as unread, with reading location gone.

Could this be due to the use or misuse of this plugin? I usually click on "Update metadata in the device" right after sending the update, maybe I should only do it after the device has processed the books (as with new uploads)? Is there anything else I can do to try to avoid the problem? Could the plugin perform some king of check to warn me, something like "Hey, this book matches one in the device, but if you upload it the device will probably re-process it"?
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Old 06-28-2015, 10:32 AM   #967
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I do frequently replace books with small changes just like you describe. When doing this, the driver will update the size of the file in the devices database. This is done to prevent the device treating it as a new book.

But, I rarely update the metadata after sending. I never think of it and do it in a big batch sometime later. I know I have done this in the past with no problem. And as I had just fixed some spelling in the book I was reading, I tried it. The book went, the metadata was updated and it wasn't reprocessed.
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Old 06-28-2015, 11:29 AM   #968
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Well, I seem to run into this kind of problem almost every time I connect the reader (every 2-4 weeks), and updating the library has become something that takes me between 2 hours and a whole afternoon, including making a backup before starting, several failed attempts, restoring the backup, sending books one by one, etc.
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Old 06-29-2015, 02:29 AM   #969
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Is that happening every time? If so, can you run calibre in debug mode then next time you plan to do it? The logs could give a clue as to what is happening. Also, check the database in case there are any errors when starting.

How long between sending the book and updating the metadata? If you did the update while the send job is running, that might cause problems. You would be fairly unlucky to consistently hit an error, but the two updates could clash. If it looks like that is the problem, I can add a check for running device jobs to prevent the other updates happening at the same time.
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Old 06-29-2015, 09:48 AM   #970
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Not every time, as I have been able, so far, to always perform the updates at the end. I've now adopted the habit of making a backup and checking the database is OK ("pragma integrity_check" with sqlitebrowser) before connecting to calibre. I've also checked the card and internal memory with dosfsck (no errors).

I always wait for the transfer to finish before updating the metadata, and for any task to finish before starting the next one, for what is worth. But I've had the same issue just with transferring books, no metadata update, so that's not the culprit. It seems to be a random event, I can't find any consistent cause, but there are a few variables that could be behind the issue and I don't always keep in mind (connecting from pure nickel, or from nickel within KSM; launching nickel from KSM right after booting, or after exiting a previous nickel session; mounting manually or letting calibre do it; trying to force a sync before disconnecting the device, or just clicking on "disconnect device" right after the transfer finishes...).

I've even had this happening:

- Connect the device to calibre: calibre reads the list of books, the plugin makes database backup. All fine.
- Select a few books, click on the plugin's "update database" menu, and bang! error message about a corrupted database.
- After restoring a previous backup and repeating the same actions, no problem at all.

I'm thinking there could be a problem with the cable or USB port, but I haven't had any issue when accessing the device outside calibre.
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Old 07-03-2015, 04:30 AM   #971
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I also do frequent replaces of a book with an improved version, not twice a month but often twice a day, but I didn't even notice that Calibre had been mended since the time it created a new entry every time you would upload a book without deleting the previous one! So I still remove the previous version before updating with the new one, and I did not think to regret to see it considered new: I only kept in mind the chapter I was reading.
But I never update the metadata either. If the cover has been changed and the old one still appears, I switch off the Kobo off and the new one is displayed at restart.
I never experienced a 2-hour wait (we are avid readers and own three different Kobos), except when I start the Kobo with 200 new books on the SD card at once.
The simplest way to update a slightly modified ebook and keep bookmarks and annotations is to overwrite it directly from the HD to the Kobo without using Calibre nor Kobo utilities! The only risk is that bookmarks may become slightly wrong.

Last edited by Francois_C; 07-03-2015 at 04:33 AM.
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Old 07-03-2015, 08:10 AM   #972
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Originally Posted by Francois_C View Post
I also do frequent replaces of a book with an improved version, not twice a month but often twice a day, but I didn't even notice that Calibre had been mended since the time it created a new entry every time you would upload a book without deleting the previous one!
When was it doing this? It should never have done this unless you changed the metadata that is used in the save template. Or you send a different format.
Quote:
So I still remove the previous version before updating with the new one, and I did not think to regret to see it considered new: I only kept in mind the chapter I was reading.
But I never update the metadata either. If the cover has been changed and the old one still appears, I switch off the Kobo off and the new one is displayed at restart.
I never experienced a 2-hour wait (we are avid readers and own three different Kobos), except when I start the Kobo with 200 new books on the SD card at once.
The simplest way to update a slightly modified ebook and keep bookmarks and annotations is to overwrite it directly from the HD to the Kobo without using Calibre nor Kobo utilities! The only risk is that bookmarks may become slightly wrong.
That should only work if the file size of the book has not changed. Unless you are on a very old firmware. I hadn't checked for a while, but a test right now showed that this is still happening. Calibre avoids this by updating the file size in the database so the book doesn't get reprocessed and hence the bookmarks and reading status are not lost.
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Old 07-03-2015, 09:03 AM   #973
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I never experienced a 2-hour wait
I didn't mean a 2-hour wait, but the process of repeatedly trying to update the books, restoring earlier backups and trying again until everything is fine often takes me a few hours.
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