Questions around ECC/BW->SLT->BW on HANA

Hi Experts,

We are working for a project implementation from ECC/BW to BW on HANA using SLT.

Below are some questions around it-

1. best practices that we need to follow while designing for above landscape with respect to -

     performance

     disaster recovery (can we have master -slave SLT servers concept)

     backup

2. Archiving considerations.

Regards,

Saritha K