Bulk convert CBR to CBZ
Mango reads cbr/rar archives using libarchive, which has quite limited RAR supports. For example, it does not support random access, so reading large cbr files would be slower, and it does not support solid archives.
If you are having issues with your cbr files, please use the bulk conversion script contributed by @jaredlt to convert all cbr files in a directory to cbz.
Multiple Libraries
Currently, Mango doesn't have multi-library support, but you can work around this by running multiple instances of Mango on the same machine. You can do so by passing in the paths to different config files when starting Mango. For example
mango --config=/path/to/config-1.yml
mango --config=/path/to/config-2.yml
will start two Mango instances with different configurations. Please make sure the config files have different port numbers and library paths.