作为一线运维或者DBA对数据备份绝对不会陌生，MysqLdump、xtrabackup等常见备份姿势更是非常熟悉，还有很多商业备份工具以及其他的开源备份工具，所谓的冷备、热备、增量备份什么的，各种名词直接晃悠的你头疼。接下来跟着我继续踩一遍软件安装的坑吧。
操作系统：CentoS 6.7
Xtrabackup版本：2.2.13
MysqL版本：5.6.30
官网文档：https://www.percona.com/doc/percona-xtrabackup/2.2/installation/yum_repo.html
常见的安装方式有源码包和yum以及RPM等方式，源码编译什么比较麻烦，rpm包安装可能会出现依赖性的问题，本文中刚开始选择了用yum的方式，
1、Install the Percona repository
yuminstallhttp://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm
2、Testing the repository
Make sure packages are now available from the repository,by executing the following command:
yumlist|greppercona
You should see output similar to the following:
... percona-xtrabackup-20.x86_642.0.8-587.rhel5percona-release-x86_64 percona-xtrabackup-20-debuginfo.x86_642.0.8-587.rhel5percona-release-x86_64 percona-xtrabackup-20-test.x86_642.0.8-587.rhel5percona-release-x86_64 percona-xtrabackup-21.x86_642.1.9-746.rhel5percona-release-x86_64 percona-xtrabackup-21-debuginfo.x86_642.1.9-746.rhel5percona-release-x86_64 percona-xtrabackup-22.x86_642.2.13-1.el5percona-release-x86_64 percona-xtrabackup-22-debuginfo.x86_642.2.13-1.el5percona-release-x86_64 percona-xtrabackup-debuginfo.x86_642.3.2-1.el5percona-release-x86_64 percona-xtrabackup-test.x86_642.3.2-1.el5percona-release-x86_64 percona-xtrabackup-test-21.x86_642.1.9-746.rhel5percona-release-x86_64 percona-xtrabackup-test-22.x86_642.2.13-1.el5percona-release-x86_64
3、install the packages
You can now installPercona XtraBackupby running:
yuminstallpercona-xtrabackup-22
根据文档配置yum源，然后开始安装软件，下载什么很慢，并且出现以下报错，于是我们就采取下载文件的方式
Totalsize:19M Totaldownloadsize:4.8M Isthisok[y/N]:y DownloadingPackages: http://repo.percona.com/release/6/RPMS/x86_64/percona-xtrabackup-22-2.2.13-1.el6.x86_64.rpm:[Errno14]PYCURLERROR18-"transferclosedwith884350bytesremainingtoread" Tryingothermirror. ErrorDownloadingPackages: percona-xtrabackup-22-2.2.13-1.el6.x86_64:failure:percona-xtrabackup-22-2.2.13-1.el6.x86_64.rpmfrompercona-release-x86_64:[Errno256]Nomoremirrorstotry.
4、使用wget下载文件 用rpm安装
wget
root@username1-pc~]#rpm-ivhpercona-xtrabackup-22-2.2.13-1.el6.x86_64.rpm warning:percona-xtrabackup-22-2.2.13-1.el6.x86_64.rpm:HeaderV4DSA/SHA1Signature,keyIDcd2efd2a:NOKEY error:Faileddependencies: perl(DBD::MysqL)isneededbypercona-xtrabackup-22-2.2.13-1.el6.x86_64 perl(Time::HiRes)isneededbypercona-xtrabackup-22-2.2.13-1.el6.x86_64
percona-xtrabackup-22x86_642.2.13-1.el6percona-release-x86_644.8M Installingfordependencies: Percona-Server-shared-51x86_645.1.73-rel14.12.625.rhel6percona-release-x86_642.1M perl-DBD-MysqLx86_644.013-3.el6base134k perl-Time-HiResx86_644:1.9721-144.el6base49k Updatingfordependencies: perlx86_644:5.10.1-144.el6base10M perl-Compress-Raw-Zlibx86_641:2.021-144.el6base70k perl-Compress-Zlibx86_642.021-144.el6base46k perl-IO-Compress-Basex86_642.021-144.el6base70k perl-IO-Compress-Zlibx86_642.021-144.el6base136k perl-Module-Pluggablex86_641:3.90-144.el6base41k perl-Pod-Escapesx86_641:1.04-144.el6base33k perl-Pod-Simplex86_641:3.13-144.el6base213k perl-libsx86_644:5.10.1-144.el6base579k perl-versionx86_643:0.77-144.el6base52k
在rpm包安装的时候出现依赖报错，我们检查了yum安装的时候出现的依赖软件包，根据提示安装相关的软件即可，例如：
yuminstall-yperl-DBD-MysqLperl-Time-HiRes
再执行rpm安装命令
rpm-ivhpercona-xtrabackup-22-2.2.13-1.el6.x86_64.rpm
安装成功，就可以备份测试了！