How to use this BigTop to build cloudera distributed hadoop ?
zxs,
Although CDH's packaging is closely based on Apache Bigtop, they are different projects: Apache Bigtop builds Linux packages from Apache tarball releases; CDH builds Linux packages from git repositories that consist of code from a specific Apache release and patches that are Apache-licensed but may not have been included in an Apache release yet. The branches of Bigtop that are used for CDH releases can be found in cloudera/cdh-package (I actually don't know why it's not cloudera/bigtop). The branches used to build all the other components of CDH are also on Github.
If you want to build Apache Bigtop, you can find information at http://bigtop.apache.org. If you want to use CDH I'd recommend you use the binary packages. You can find repositories for the latest release here: http://www.cloudera.com/content/cloudera/en/downloads/cdh/cdh-5-2-0.html. If you want to rebuild them from source, you might consider rebuilding source packages. You can find some documentation on that here: http://www.cloudera.com/content/cloudera/en/documentation/cdh4/latest/CDH4-Installation-Guide/cdh4ig_topic_32.html.