architecture - How to design Data Access layer in Entity Framework (Data First) -

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i working on enterprise solutions , using ef data first our data access layer. have around 100 tables in database , adding them 1 entity data model. project grow going have 1 big entity data model around 500 tables.

we planning create small modules each component of application , creating separate entity data model each.if has experience of approach please share pros , cons of it.

do want service layer if not can directly create edmx 500 tables. entity framework support. issue face - wont able open edmx file in design mode. have deal in xml format only. also, need disable code generation every time project can load easily.


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