47. 水平シャード
user_id: 1 user_id: 3
user_id: 4user_id: 2
new Master_1
user_id: 1 user_id: 3
user_id: 4user_id: 2
new Master_2
user_id: 1 user_id: 3
user_id: 4user_id: 2
new Slave_1
user_id: 1 user_id: 3
user_id: 4user_id: 2
new Slave_2
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48. 水平シャード
new Master_1> STOP SLAVE;
new Master_1> RESET SLAVE ALL;
new Master_1> SET GLOBAL read_only = 0;
new Master_1> DELETE .. FROM .. WHERE user_id % 2 = 1;
new Master_2> STOP SLAVE;
new Master_2> RESET SLAVE ALL;
new Master_2> SET GLOBAL read_only = 0;
new Master_2> DELETE .. FROM .. WHERE user_id % 2 = 0;
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