Java stack system copy

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Dear Experts,

I have recently done few ABAP+java stack system copies using R3load method. Basically i have done Export ABAP and JAVA stack and Imported the same to QAS system using sapinst with SMIGR_CREATE_DDLs kept along with Import.

But i am really not having in depth idea over it even after reading system-copy guides for Neweaver SR1.

Because this procedure is taking a lot of time as compared to our old technique for only ABAP stack which was normal backup and restore of database and then change of SID with controlfile.

But while reading TADM10 i found backing up and restoring AS java ..

and i have querry whether is there any way we can do simple database backup and restore for ABAP stack ... and then just Export JAVA stack from source and Import the same to target QAS machine which will save time for us.

Or anything like just backup SDM , instance dir,bootstarp.properties,instance.properties and then Import through Configtool in Target machine.

Please let me know the procedure in depth as we are really facing hard time because of downtime required for R3load Export-import method.

Best Regards,

AjitR