US Patent 10268472 Upgrading systems with replicated data

Methods, systems, and computer-readable storage media for executing, by a target system deploy tool, a first portion of a target-side maintenance procedure on the target system, halting execution of the first portion of the target-side maintenance procedure, executing, by a source system deploy tool, a source-side maintenance procedure on the source system, wherein, during execution of the source-side maintenance procedure, table structure change events are recorded in a source-side orchestration table, reading, by a replicator, the table structure change events recorded in the source-side orchestration table, writing, by the replicator, the table structure change events to a target-side orchestration table, and executing, by the target system deploy tool, a second portion of the target-side maintenance procedure on the target system, at least in part, by performing the table structure change events of the target-side orchestration table on one or more tables of the target system.