Today I saw the nice article in www.oracle.com . I would like to share with you all.
From this article:
In June of 2010, Dell made the decision to migrate 1,700 systems from SUSE Linux to Oracle Linux, while leaving the hardware and application layers unchanged. Standardization across the Linux platforms helped make this large-scale conversion possible. The majority of the site-specific operating system and application configuration could simply be backed up and restored directly on the new operating system. Configuration changes were minimal and most could be automated, easing the administration effort required and helping achieve a reliable and consistent transition procedure.
More Details about this migration:
Reference: www.oracle.com