Depot Management

The nodes of an Eon Mode database fetch data from communal storage as needed to process queries, and cache that data locally on disk. The cached data of all nodes within a subcluster comprise that cluster's depot. Vertica uses depots to facilitate query execution: when processing a query, Vertica first checks the current depot for the required data. If the data is unavailable, Vertica fetches it from communal storage and saves a copy in the depot to expedite future queries. Vertica also uses the depot for load operations, caching newly-loaded data in the depot before uploading it to communal storage.