Worked on the valkey repository to optimize replication efficiency by enabling reuse of the RDB file as the AOF base after disk-based full sync, thereby reducing redundant AOF rewrites and lowering CPU and IO overhead. The approach streamlined incremental AOF creation and eliminated the need for BGREWRITEAOF when aof-use-rdb-preamble is enabled. Comprehensive end-to-end validation was implemented, covering both disk-based and diskless sync scenarios, including replica restarts and handling of stale dump files. The work was carried out using C and focused on database management, replication mechanisms, and system programming, with robust fallbacks documented for scenarios where preamble is disabled.