How many SLDs should be there in the landscape. Should there be only one SLD for DEV, QAS & PRD or should there be two SLDs; one for DEV-QAS & other for PRD or 3 SLDs; each for DEV, QAS & PRD. Also please support your replies with reasons.
We use 2 SLD's, one for DEV, QAS and sandboxes, and another one for PRD.
The advantage is that we have a test SLD, and that the production SLD will stay clean. The disadvantage is for exemple when data from a test system needs to be sent to the PRD system, then you'll need to change the SLD connection of the system.
More info on SLD planning in the [SLD Planning Guide|https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/e0a1a8fb-0527-2a10-f781-8b67eab16582]