Hi, Currently we are migrating an non rac database to rac database. Source: OS :RHEL4 Database Version: 10g R2 32 bit RAC : No Target : OS :RHEL5 Database Version : 10R2 64 Bit RAC : 2 node ASM database For the above migration, i have taken expdp/impdp methodology.It takes 15 hours to complete activity.(The data transfer rate from source to destination is 300KB per seconds) Please suggest as any other methodology for this migration to reduce downtime. Regards Krishna