Hi all, Now I want to update this software in epel6 from 4.x to 5.x. But I found that the most important thing I must do is to migrate old data format to the new one. I don't know this upgrade is possible or not, but I hope successful, even though the spec file is the most difficult thing to handle. I also feel happy that the official wiki contains a migration guide [1].It has already given a script of data migration. See [2] for details. Unfortunately I don't know this script is helpful or we should do enhancements on it in order to match the guidelines(and fix some unknown errors).Therefore can anyone do me a favour,help me test the script? Thanks a lot. [1] http://collectd.org/wiki/index.php/V4_to_v5_migration_guide [2] http://git.verplant.org/?p=collectd.git;a=blob;hb=master;f=contrib/migrat... -- *Yours sincerely,* *Christopher Meng* Ambassador/Contributor of Fedora Project and many others. http://cicku.me