Quote:
Originally Posted by slm
Ahem: ever heard of Calibre Companion (defunct) or Calibre Sync?
They operate (if the user so chooses) by reading the Calibre database (in Dropbox or another cloud) and then accessing the actual books at the location in the cloud indicated by the database. A great many users of Android and iOS devices use these to access their Calibre library.
Before Calibre Companion went to hell, it had an active page on Mobileread.
Calibre Sync now has an active page here. While these pages report many issues, none of them is about corrupting the database.
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The issue would occur if calibre and Calibre Companion/Calibre Sync were attempting to modify a live database at the same time. The people I know who use either keep their live calibre library on a local drive and do a one-way sync to the cloud when calibre is not running. Running a calibre library from a cloud drive is a great path to a corrupted library whether or not you are using Calibre Sync or Calibre Companion.
See
SQLite Over a Network, Caveats and Considerations and in calibre's FAQs,
I am getting errors with my calibre library on a networked drive/NAS? for more information.