One: the difference between is and ==
1. is compare memory address
1)id() —- get memory address
2 )Small data pool:
a. The small data pool range of numbers is -5 ~ 256
b. String:
Author: Simo
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$ cat /etc/centos-release
CentOS Linux release 7.4.1708 (Core)
$ uname -r
3.10.0-693.el7.x86_64
Download and install xtrabackup:
$ wget https://www.percona.com/downloads/XtraBacku
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