Quote:
Originally Posted by cybmole
it was suggested in some other thread that excluding opfs would speed up sync with cloud storage backups, as it's an extra file per book to check and sync. so folks with slow connections were all for it. but in terms of data, it "saved" somethign like 160MB of 3+GB
but as was just said in another response, it's easy to do something in calibre that causes all opfs to need re synching , even for books that have not otherwise changed( though I am not sure what the "something" is). so if google drive is running at it's usual snail pace, you notice that it's still chugging away when you want to shut down.
in my case, the cloud backups are like a last resort archive , I'd probably only go there for a single book that I'd rashly deleted from main live & daily backup but which I now wanted back.
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If you correct a spelling or casing error in something like a tag or publisher that will trigger an update of all the relevant opf's, if you add a column and populate it via a bulk edit S&R that will also do it.
I did the latter to two libraries last last year, the change triggered opf updates to about 80K books. IIRC the daily backup to a WD Black Caviar in a USB 3.0 dock took an extra 10 minutes or so. Not sure how much longer the weekly backup took, I was busy sleeping - it's on a commercial FTP server over a 2Mbps WAN link
The most likely point of failure on my system is me. That's why I prefer the KISS approach.
BR