What is the way to skip Event in the case of two hosts in MySQL

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How to skip the same server id Event in the case of two hosts:

IO threads skip operations by comparing SERVER_ID

{mi- > set_master_log_pos (mi- > get_master_log_pos () + inc_pos); memcpy (rli- > ign_master_log_name_end, mi- > get_master_log_name (), FN_REFLEN); DBUG_ASSERT (rli- > ign_master_log_name_end [0]); rli- > ign_master_log_pos_end= mi- > get_master_log_pos ();}

The SQL thread constructs a Rotate_log_event

If (rli- > ign_master_log_name_end [0]) {/ * We generate and return a Rotate, to make our positions advance * / DBUG_PRINT ("info", ("seeing an ignored end segment")) Ev= new Rotate_log_event (rli- > ign_master_log_name_end, 0, rli- > ign_master_log_pos_end, exec_relay_log_event Rotate_log_event::DUP_NAME); rli- > ign_master_log_name_end [0] = 0; mysql_mutex_unlock (log_lock) Exec_relay_log_event if (unlikely! ev) {errmsg= "Slave SQL thread failed to create a Rotate event" (out of memory?), SHOW SLAVE STATUS may be inaccurate "; goto err;} ev- > server_id= 0; / / don't be ignored by slave SQL thread DBUG_RETURN (ev);}

In this way, these Event will not be written to the relay log,SQL thread or read, and the pos will be increased accordingly.

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