Dynamic hash function composition for change detection in distributed storage systems

A computing device, comprising:

• a processor;
• and
• a memory having instructions executable by the processor to cause the computing device to perform operations, comprising:
• receiving data representing a new version of a document, the new version of the document having a property, the property including a value describing or identifying the document;
• identifying a hash function for the property of the new version of the document based, at least in part, on one or more of a data size of the value of the property in the new version of the document or a data type of the value of the property in the new version of the document;
• generating a hash value of the value of the property using the identified hash function;
• comparing the generated hash value of the property in the new version of the document to a corresponding hash value of the property from a previous version of the document in a distributed storage system;
• and
• based on detecting that the generated hash value of the property in the new version of the document is different from the hash value of the property from the previous version of the document, transmitting, via a computer network, a notification to only one or more computing services previously registered to receive a notification regarding a change in the property without transmitting the notification to other computing services not registered to receive the notification.

A method, comprising:

• receiving data representing a new version of a document stored in a distributed storage system, the received new version of the document having a property, the property including a value describing or identifying the document;
• dynamically selecting a hash function for the property of the new version of the document;
• generating a hash value of the value of the property in the new version of the document using the selected hash function;
• determining whether the generated hash value of the property in the new version of the document is different than a corresponding hash value of a previous version of the document in the distributed storage system;
• and
• based on determining that the generated hash value in the new version of the document is different than the corresponding hash value of the previous version of the document, transmitting, via a computer network, a notification to only one or more computing services previously registered to receive a notification regarding a change in the property without transmitting the notification to other computing services not registered to receive the notification.