With Fedora ≥ 19

yum --enablerepo=remi install libmemcached

With Fedora ≤ 18 and Enterprise Linux the package is named "libmemcached-last". So it is possible to install the new version of the library beside systeme one. 

yum --enablerepo=remi install libmemcached-last-libs

However, you cannot install both libmemcached-last + libmemcached.

If you need the system default version of the library for some other applications:

  • libmemcached (commands + old library) + libmemcached-last-libs (library v11).

If you don't need the system default version:

  • libmemcached-last (only commands) + libmemcached-last-libs (library v11).

RPM are available for Fedora 15 to 20 and Enterprise Linux 6.