Conditional saving of input data

1. A method performed by at least one computing device, the method comprising:

obtaining, by at least one server, a request that a service perform processing on input data to produce an output representation of the input data;

determining, by applying criteria to the request, that the service cannot perform the processing on the input data to produce the output representation; and

responsive to determining that the service cannot process the input data, preserving the input data.

2. The method of claim 1 , wherein the input data comprises a document for the service to render to obtain the output representation.

3. The method of claim 1 , wherein applying the criteria to the request comprises evaluating computer resources used to perform the service.

4. The method of claim 1 , wherein applying the criteria to the request comprises evaluating the output representation of the input data.

5. The method of claim 1 , wherein the request is on behalf of a user having associated cloud storage, and the preserving the input data comprises storing the input data in the associated cloud storage of the user.

6. A cloud computing system comprising:

one or more hardware processing units; and

one or more computer-readable storage devices storing computer-executable instructions which, when executed by the one or more hardware processing units, cause the cloud computing system to:

receive a service request over a network, the service request comprising input data;

determine that the service request indicates that the input data should not be persisted by the cloud computing system;

detect a failure after beginning to process the service request;

determine, based on the failure, that the service request cannot be performed; and

responsive to detecting a failure, override the service request by persisting the input data.

7. The cloud computing system of claim 6 , wherein the computer-executable instructions cause the cloud computing system to:

persist the input data by storing the input data in cloud storage.

8. The cloud computing system of claim 6 , wherein the computer-executable instructions cause the cloud computing system to:

persist the input data by embedding the input data as an object in a document.

9. The cloud computing system of claim 8 , wherein the cloud computing system provides a digital notebook cloud service and the object is embedded in a digital notebook.

10. The cloud computing system of claim 9 , wherein the service request is a request to render the input data.

11. The cloud computing system of claim 10 , wherein the input data comprises a portable document format file.

12. The cloud computing system of claim 6 , wherein the computer-executable instructions cause the cloud computing system to:

detect the failure by applying criteria to at least one of the input data, an output of the service request, or computer resources used to process the service request.

13. A method performed by at least one computing device, the method comprising:

obtaining, by at least one server, a service request having input data, wherein the service request includes a request to return an output to a client;

processing the input data to form the output;

applying criteria to the output, wherein applying the criteria comprises evaluating the size of a memory footprint of the output; and

responsive to detecting that the output of the service request satisfies the criteria, preserving the input data of the service request;

sending an error message to a client that the service request cannot be processed.

14. The method of claim 13 , wherein applying the criteria further comprises determining whether any components of the output have memory footprints exceeding a threshold.

15. The method of claim 13 , wherein applying the criteria further comprises determining whether storing the output causes a storage quota to be exceeded.

16. The method of claim 15 , wherein the storage quota comprises a cloud storage quota associated with a user account.

17. The method of claim 16 , wherein the preserving the input data comprises storing the input data in cloud storage associated with the user account.