calibre: move SQLite DBs to local SSD, sync library to NAS via lsyncd

calibre/docker-compose.yaml

@@ -1,7 +1,8 @@
 # https://thebloody.cloud/posts/Installing-Web-Calibre-in-Docker/
-# Uses NFS via systemd automount (/mnt/nas_books) + bind mounts.
-# Docker NFS named volumes caused SQLITE_IOERR on soft timeouts; systemd
-# automount with hard NFS blocks briefly on spin-up instead of returning EIO.
+# SQLite databases (metadata.db, notes.db) live on local SSD to avoid NFS IOError.
+# lsyncd syncs /srv/calibre/library → /mnt/nas_books/calibre/Calibre Library
+# within ~15s so other devices see an up-to-date read-only replica on the NAS.
+# calibre-import stays on NFS as the drop folder for new books.
 
 networks:
   default:
@@ -22,7 +23,8 @@ services:
       - VIRTUAL_PORT=8080
       - LETSENCRYPT_HOST=calibre.kolpacksoftware.com
     volumes:
-      - /mnt/nas_books/calibre:/config
+      - /srv/calibre/config:/config
+      - /srv/calibre/library:/config/Calibre Library
       - /mnt/nas_books/calibre-import:/calibre-import
     ports:
       - 8090:8080