Are two instances of Calibre with one library possible?

Magic815 · 05-03-2022, 06:57 PM

Hi there -

So I've got a scenario where I'm looking to have Calibre run in a docker container continuously - so that it can integrate and work with a program called readarr (https://readarr.com/).

However, with the docker container approach, it is not compatible with me running the KFX Output plugin, as that has a dependency on KindlePreviewer/WINE, and that is not built into the docker container.

So this got me thinking: What if I run my Calibre DB and have the library folder all on my always-on server via the docker method, but then I set up a 2nd instance of Calibre on my Windows PC - and point it to the same DB/library? The theory being that it could allow me to handle KFX conversion on my Windows PC Calibre instance.

However, I figured I'd check on if that is even possible, as I imagine two Calibre instances pointing to the same DB/library could cause quite a mess, if the program is not set up to work that way.

kovidgoyal · 05-03-2022, 09:38 PM

No you cant. Simply setup an auto add folder for your always on calibre , do the kfx conversion on your pc and copy the files to the autoadd folder or alternatively if youare comfortable using the command line use the calibredb program to connect to the always on calibre and add books/formats using it.

Magic815 · 05-03-2022, 09:41 PM

Got it - appreciate you confirming!

05-03-2022, 06:57 PM	#1
Magic815 Enthusiast Posts: 38 Karma: 98 Join Date: May 2022 Device: Kindle Paperwhite 11th Gen (2021)	Are two instances of Calibre with one library possible? Hi there - So I've got a scenario where I'm looking to have Calibre run in a docker container continuously - so that it can integrate and work with a program called readarr (https://readarr.com/). However, with the docker container approach, it is not compatible with me running the KFX Output plugin, as that has a dependency on KindlePreviewer/WINE, and that is not built into the docker container. So this got me thinking: What if I run my Calibre DB and have the library folder all on my always-on server via the docker method, but then I set up a 2nd instance of Calibre on my Windows PC - and point it to the same DB/library? The theory being that it could allow me to handle KFX conversion on my Windows PC Calibre instance. However, I figured I'd check on if that is even possible, as I imagine two Calibre instances pointing to the same DB/library could cause quite a mess, if the program is not set up to work that way.

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05-03-2022, 09:38 PM	#2
kovidgoyal creator of calibre Posts: 45,345 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No you cant. Simply setup an auto add folder for your always on calibre , do the kfx conversion on your pc and copy the files to the autoadd folder or alternatively if youare comfortable using the command line use the calibredb program to connect to the always on calibre and add books/formats using it.

05-03-2022, 09:41 PM	#3
Magic815 Enthusiast Posts: 38 Karma: 98 Join Date: May 2022 Device: Kindle Paperwhite 11th Gen (2021)	Got it - appreciate you confirming!

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