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14.11.2 Semi-Synchronous ACK Packet

Each Semi Sync Binlog Event with the SEMI_SYNC_ACK_REQ flag set the slave has to acknowledge with Semi-Sync ACK packet:

SEMI_SYNC_ACK
  payload:
    1                  [ef]
    8                  log position
    string             log filename

which the master acknowledges with a OK_Packet or a ERR_Packet.


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