Shulou(Shulou.com)06/01 Report--

On July 17, 2015, when I was doing the master-slave switching experiment with a script, I saw that there was an error on the slave: the master-slave link of Could not find first log file name in binary log index file was normal at that time, Slave_IO_Running: Yes Slave_SQL_Running: Yes, but the log of the host was sent, and the slave could not be applied. Re-stop slave; reset slave; change master to still won't work. But the network is good, and re-change will not work. Then it suddenly occurred to me that when I switched yesterday, there were so many failures that the data on the host did not come over. If you find a problem, you will know how to make a re-mysqldump backup, and then restore it from the machine, and then change master to the ok! Under normal circumstances, re-change to will be fine, but my, uh, uh.

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