不影响的，只要把其他几个改名留一个做本地yun源，一个网络yum源,j就可以

这种更新应该是用户自己上传的，百度后英语硬翻译，前面我装B了，其实我也不懂

CentOS will also build the fastrack SRPMS. We have created separate
repositories in CentOS-3 and CentOS-4 called fasttrack. (I know the
spelling is different, that is by design. We don't want to use the name
of the upstream provider's program. Same as our use of CSGFS for
Cluster Suite / Global File System, and not the upstream acronyms.)

The purpose of the CentOS-FastTrack repo is to provide Bugfix and
Enhancement updates for people who choose to do these updates BETWEEN
the point releases.

某个软件版本还是1.0，还没有到1.1，但是人家已经有了bugfix或功能更新的内容，但是还没有升到1.1，二你想要这些更新

这算一个问题吗。。。