PredictionIO relies on a data store to store its metadata. At the moment, PredictionIO's storage layer supports both Elasticsearch and MongoDB. Make sure you have one of these running and functioning properly on your computer.
If you are using Elasticsearch at the localhost and its default settings, you may stop here.
Otherwise, change the following in conf/pio-env.sh to fit your setup.
PIO_STORAGE_SOURCES_ELASTICSEARCH_TYPE=elasticsearch PIO_STORAGE_SOURCES_ELASTICSEARCH_HOSTS=localhost PIO_STORAGE_SOURCES_ELASTICSEARCH_PORTS=9300
If you use MongoDB, add and modify the following to fit your setup.
PIO_STORAGE_SOURCES_MONGODB_TYPE=mongodb PIO_STORAGE_SOURCES_MONGODB_HOSTS=localhost PIO_STORAGE_SOURCES_MONGODB_PORTS=27017
The following points the storage repositories to their respective backend data sources. By default, they point to Elasticsearch.
PIO_STORAGE_REPOSITORIES_METADATA_SOURCE=ELASTICSEARCH PIO_STORAGE_REPOSITORIES_APPDATA_SOURCE=ELASTICSEARCH
If you use MongoDB, change them to something like this.
PIO_STORAGE_REPOSITORIES_METADATA_SOURCE=MONGODB PIO_STORAGE_REPOSITORIES_APPDATA_SOURCE=MONGODB
Save conf/pio-env.sh and you are done!