Originally Posted by vlad59
COPS does not cache data but your browser can so try CTRL+F5 to be sure to have an up to date page.
What do you use to synchronize your library ?
There is no limit on Calibre's library size, I have a test library with over 20K books and COPS works fine with it.
Yup. I use a directory sync program (FreeFileSync) to update the copy of my library on the NAS (a Synology DS213J) COPS runs on, and COPS picks up the changes just fine.