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Please note that the items the user selects to include in a single ADS request can make a significant difference in terms of performance i.e. how long a given request will take to run. Please see the page Efficiency tips for how to build an efficient request.
On the ADS cache disks, requests and relevant results are generally stored for 1.5 to 2 days, depending on the user load on the ADS system. After this period, files can be deleted, starting from the oldest.
Please note that cached data (if present) is used to fulfill an ADS request only if the ADS request is exactly identical to a previous one. This means that data will be extracted from the cache, rather than being re-retrieved from the dataset itself.
The ADS data availability information is now available through REST API:
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