V6 introduced updated c-tree Plus file format with extended headers for advanced feature support.
Convert your existing V6 data files with the ctcv67conversion utility. This utility converts existing c-tree Plus data files to the extended format introduced in V7. Extended header support offers HUGE file support and segmented files.
Use the Xtd8 file creation functions to create new Extended files.
For data files supporting HUGE file support, remember to update your duplicate index keys in the IFIL definitions to include an additional 4 bytes for the associated record position.
Note that the ctreep.h header file automatically includes the ctv6v7.h header.
Cleanly shut down any existing V6 Servers and remove remaining transaction logs (Steps for a Clean Upgrade). V9 introduces a new transaction log format.
Store a copy of the V6 dynamic dump restore utility (ctrdmp) with any remaining backup files in case of future recovery. Consider validating a fresh V9 dump and restore and review your backup procedures at this time.
