xtrabackup需要Requires: libev.so.4()(64bit)

[root@test153 ~]# wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.3.4/binary/redhat/6/x86_64/percona-xtrabackup-2.3.4-1.el6.x86_64.rpm   

2018-10-16 09:51:36 (723 KB/s) - “percona-xtrabackup-2.3.4-1.el6.x86_64.rpm” saved [5701116/5701116]

[root@test153 ~]# yum localinstall percona-xtrabackup-2.3.4-1.el6.x86_64.rpm
Loaded plugins: fastestmirror
Setting up Local Package Process
Examining percona-xtrabackup-2.3.4-1.el6.x86_64.rpm: percona-xtrabackup-2.3.4-1.el6.x86_64
Marking percona-xtrabackup-2.3.4-1.el6.x86_64.rpm to be installed
...
---> Package percona-xtrabackup.x86_64 0:2.3.4-1.el6 will be installed
--> Processing Dependency: libev.so.4()(64bit) for package: percona-xtrabackup-2.3.4-1.el6.x86_64
---> Package perl-DBI.x86_64 0:1.609-4.el6 will be installed
--> Finished Dependency Resolution
Error: Package: percona-xtrabackup-2.3.4-1.el6.x86_64 (/percona-xtrabackup-2.3.4-1.el6.x86_64)
Requires: libev.so.4()(64bit)
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

[root@test153 ~]# wget ftp://rpmfind.net/linux/atrpms/el6-x86_64/atrpms/stable/libev-4.04-2.el6.x86_64.rpm
--2018-10-16 09:55:37-- ftp://rpmfind.net/linux/atrpms/el6-x86_64/atrpms/stable/libev-4.04-2.el6.x86_64.rpm
=> “libev-4.04-2.el6.x86_64.rpm”
Resolving rpmfind.net... 195.220.108.108
...

2018-10-16 09:55:46 (160 KB/s) - “libev-4.04-2.el6.x86_64.rpm” saved [38140]

[root@test153 ~]# rpm -ivh libev-4.04-2.el6.x86_64.rpm
warning: libev-4.04-2.el6.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 66534c2b: NOKEY
Preparing... ########################################### [100%]
1:libev ########################################### [100%]
[root@test153 ~]# yum localinstall percona-xtrabackup-2.3.4-1.el6.x86_64.rpm

...

Dependency Installed:
perl-DBD-MySQL.x86_64 0:4.013-3.el6 perl-DBI.x86_64 0:1.609-4.el6 rsync.x86_64 0:3.0.6-12.el6

Complete!