[root@idb4 ~]# yum install percona-xtrabackup
Loaded plugins: aliases, changelog, downloadonly, fastestmirror, kabi, presto, refresh-packagekit, security, tmprepo, verify,
: versionlock
Loading support for CentOS kernel ABI
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Repository contrib is listed more than once in the configuration
Loading mirror speeds from cached hostfile
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package percona-xtrabackup.x86_64 0:2.3.7-2.el6 will be installed
--> Processing Dependency: libev.so.4()(64bit) for package: percona-xtrabackup-2.3.7-2.el6.x86_64
--> Finished Dependency Resolution
Error: Package: percona-xtrabackup-2.3.7-2.el6.x86_64 (percona-release-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


这个是缺少包Requires: libev.so.4()(64bit)所致，下载所需要的包：
[root@idb4 ~]# wget ftp://rpmfind.net/linux/atrpms/el6-x86_64/atrpms/stable/libev-4.04-2.el6.x86_64.rpm
--2017-04-06 15:28:19-- 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
Connecting to rpmfind.net|195.220.108.108|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.==> PWD ... done.
==> TYPE I ... done. ==> CWD (1) /linux/atrpms/el6-x86_64/atrpms/stable ... done.
==> SIZE libev-4.04-2.el6.x86_64.rpm ... 38140
==> PASV ... done.==> RETR libev-4.04-2.el6.x86_64.rpm ... done.
Length: 38140 (37K) (unauthoritative)


100%[========================================================================================>] 38,140101K/sin 0.4s


2017-04-06 15:28:25 (101 KB/s) - “libev-4.04-2.el6.x86_64.rpm” saved [38140]


RPM安装:


[root@idb4 ~]# 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%]


再次运行后成功安装:
[root@idb4 ~]# yum install percona-xtrabackup
Loaded plugins: aliases, changelog, downloadonly, fastestmirror, kabi, presto, refresh-packagekit, security, tmprepo, verify,
: versionlock
Loading support for CentOS kernel ABI
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Repository contrib is listed more than once in the configuration
Loading mirror speeds from cached hostfile
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package percona-xtrabackup.x86_64 0:2.3.7-2.el6 will be installed
--> Finished Dependency Resolution


Dependencies Resolved


==================================================================================================================================
PackageArch Version Repository Size
==================================================================================================================================
Installing:
percona-xtrabackupx86_642.3.7-2.el6 percona-release-x86_645.3 M


Transaction Summary
==================================================================================================================================
Install1 Package(s)


Total download size: 5.3 M
Installed size: 21 M
Is this ok [y/N]: y
Downloading Packages:
Setting up and reading Presto delta metadata
Processing delta metadata
Package(s) data still to download: 5.3 M
percona-xtrabackup-2.3.7-2.el6.x86_64.rpm | 5.3 MB 00:04
warning: rpmts_HdrFromFdno: Header V4 DSA/SHA1 Signature, key ID cd2efd2a: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Percona
Importing GPG key 0xCD2EFD2A:
Userid : Percona MySQL Development Team <mysql-dev@percona.com>
Package: percona-release-0.1-3.noarch (@/percona-release-0.1-3.noarch)
From: /etc/pki/rpm-gpg/RPM-GPG-KEY-Percona
Is this ok [y/N]: y
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
Installing : percona-xtrabackup-2.3.7-2.el6.x86_64 1/1
Verifying : percona-xtrabackup-2.3.7-2.el6.x86_64 1/1


Installed:
percona-xtrabackup.x86_64 0:2.3.7-2.el6