Site-consolidated disaster-recovery with synchronous-to-asynchronous traffic conversion

A method for site-consolidated disaster-recovery with synchronous-to-asynchronous traffic conversion, the method comprising:

• a processor of a disaster-recovery system receiving notice that a source database has become inaccessible,
• where transactions of the source database are backed up, via synchronous replication to a target database, through a backup path comprised by a disaster-recovery network,
• where each non-database node of the disaster-recovery network hosts a unique SATC (Synchronous-to-Asynchronous Converter) of a plurality of SATC modules, and
• where a synchronous replication of a transaction from a predecessor SATC on the backup path to an adjacent successor SATC on the backup path comprises storing local copies of the transaction in local persistent storage areas of the predecessor SATC and the successor SATC;
• the processor identifying a range of partially replicated transactions of the source database that have not been replicated to the target database;
• the processor pausing any ongoing data-restoration operations;
• the processor generating one or more sets of tracking entries,
• where each set of the one or more sets associates one transaction of the partially replicated transactions with a recovery path, through the disaster-recovery network, from the target database to the source database;
• the processor locating previously stored copies of one or more of the partially replicated transactions in local storage areas of SATCs on the recovery path;
• the processor waiting until the located transaction copies have been replicated to the target database;
• and
• the processor restarting any paused data-restoration operations.

A computer program product, comprising a computer-readable hardware storage device having a computer-readable program code stored therein, the program code configured to be executed by a disaster-recovery comprising a processor, a memory coupled to the processor, and a computer-readable hardware storage device coupled to the processor, the storage device containing program code configured to be run by the processor via the memory to implement a method for site-consolidated disaster-recovery with synchronous-to-asynchronous traffic conversion, the method comprising:

• the processor receiving notice that a source database has become inaccessible,
• where transactions of the source database are backed up, via synchronous replication to a target database, through a backup path comprised by a disaster-recovery network,
• where each non-database node of the disaster-recovery network hosts a unique SATC (Synchronous-to-Asynchronous Converter) of a plurality of SATC modules, and
• where a synchronous replication of a transaction from a predecessor SATC on the backup path to an adjacent successor SATC on the backup path comprises storing local copies of the transaction in local persistent storage areas of the predecessor SATC and the successor SATC;
• the processor identifying a range of partially replicated transactions of the source database that have not been replicated to the target database;
• the processor pausing any ongoing data-restoration operations;
• the processor generating one or more sets of tracking entries,
• where each set of the one or more sets associates one transaction of the partially replicated transactions with a recovery path, through the disaster-recovery network, from the target database to the source database;
• the processor locating previously stored copies of one or more of the partially replicated transactions in local storage areas of SATCs on the recovery path;
• the processor waiting until the located transaction copies have been replicated to the target database;
• and
• the processor restarting any paused data-restoration operations.