| NC_REDIS_URL | No | Custom Redis URL. Example: `redis://:authpassword@127.0.0.1:6380/4` | Meta data will be stored in memory | |
| NC_DISABLE_CACHE | No | If it is set to `true`, then meta data will not be cached. | `false` | |
| NC_DISABLE_CACHE | No | To be used only while debugging. On setting this to `true` - meta data be fetched from db instead of redis/cache. | `false` | |