some more information When install mariadb-libs, it will install Percona-Server-shared-56. However, the Percona-Server-shared-56 is conflict with MariaDB-shared/MariaDB-common, they have the same file `/etc/my.cnf`, and a almost the same so file `/usr/lib64/libmysqlclient.so.18.1.0`( only the mirco version is different) $ rpm -ql Percona-Server-shared-56 /etc/my.cnf /usr/lib64/libmysqlclient.so.18.1.0 /usr/lib64/libmysqlclient_r.so.18.1.0 $ rpm -ql MariaDB-shared /etc/my.cnf.d /etc/my.cnf.d/client.cnf /usr/lib64/libmysqlclient.so /usr/lib64/libmysqlclient.so.18 /usr/lib64/libmysqlclient.so.18.0.0 /usr/lib64/libmysqlclient_r.so /usr/lib64/libmysqlclient_r.so.18 /usr/lib64/libmysqlclient_r.so.18.0.0 $ rpm -ql MariaDB-common /etc/my.cnf ... $ yum install mariadb-libs Loaded plugins: fastestmirror, ovl, priorities, versionlock Loading mirror speeds from cached hostfile * base: centos.mirror1.spango.com * epel: mirror.vutbr.cz * extras: centos.mirror1.spango.com * updates: mirrors.supportex.net 1322 packages excluded due to repository priority protections Package mariadb-libs is obsoleted by Percona-XtraDB-Cluster-shared-55, trying to install 1:Percona-XtraDB-Cluster-shared-55-5.5.41-25.11.853.el7.x86_64 instead Resolving Dependencies --> Running transaction check ---> Package Percona-XtraDB-Cluster-shared-55.x86_64 1:5.5.41-25.11.853.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved =============================================================================================================================================================== Package Arch Version Repository Size =============================================================================================================================================================== Installing: Percona-XtraDB-Cluster-shared-55 x86_64 1:5.5.41-25.11.853.el7 percona-release-x86_64 565 k Transaction Summary =============================================================================================================================================================== Install 1 Package Total download size: 565 k Installed size: 565 k $ yum install MariaDB-shared Loaded plugins: fastestmirror, ovl, priorities, versionlock Loading mirror speeds from cached hostfile * base: centos.mirror1.spango.com * epel: mirror.vutbr.cz * extras: centos.mirror1.spango.com * updates: mirrors.supportex.net 1322 packages excluded due to repository priority protections Resolving Dependencies --> Running transaction check ---> Package MariaDB-shared.x86_64 0:10.0.24-1.el7.centos will be installed --> Processing Dependency: MariaDB-common for package: MariaDB-shared-10.0.24-1.el7.centos.x86_64 --> Running transaction check ---> Package MariaDB-common.x86_64 0:10.0.24-1.el7.centos will be installed --> Finished Dependency Resolution Dependencies Resolved =============================================================================================================================================================== Package Arch Version Repository Size =============================================================================================================================================================== Installing: MariaDB-shared x86_64 10.0.24-1.el7.centos mariadb 1.2 M Installing for dependencies: MariaDB-common x86_64 10.0.24-1.el7.centos mariadb 43 k Transaction Summary =============================================================================================================================================================== Install 1 Package (+1 Dependent package) Total download size: 1.2 M Installed size: 1.2 M