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14.11.1 Semi-Synchronous Binlog Event

After the 00 OK-byte of a binlog network stream 2 bytes get added before the normal Binlog Event continues.:

1                  [ef] semi-sync indicator
1                  semi-sync flags
semi-sync flags





If the SEMI_SYNC_ACK_REQ flag is set the master waits for a Semi Sync ACK packet from the slave before it sends the next event.

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