DISTRIBUTED TRANSACTION EXECUTION MANAGEMENT IN DISTRIBUTED DATABASES

A distributed database system for handling transactions from multiple client systems. A database node receives a request to execute a transaction from a first client, involving a record modification. This record has an associated check-and-set (CAS) value that changes with modifications. The record is sent to the first client, which identifies the CAS value. Similarly, a second client sends a request for another transaction, receives the record, and identifies the CAS value. One of these clients attempts to stage a mutation based on their transaction. This includes sending the previously received CAS value. The system checks for a CAS value mismatch, indicating a conflicting mutation from another transaction. If a mismatch is detected, the transaction attempt is aborted to prevent conflicts. Otherwise, the mutation is staged, and the CAS value is updated.