1 rserpool-comp-06.ppt / 14 July 2003 / John Loughney IETF 57 Comparison of Protocols for Reliable Server Pooling John Loughney.

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Presentation transcript:

1 rserpool-comp-06.ppt / 14 July 2003 / John Loughney IETF 57 Comparison of Protocols for Reliable Server Pooling John Loughney

2 rserpool-comp-06.ppt / 14 July 2003 / John Loughney Changes Updated CORBA section Updated DNS section Updated SLP section New L4/L7 Switching section Expanded ASAP & ENRP section

3 rserpool-comp-06.ppt / 14 July 2003 / John Loughney CORBA Tightened text, in general. Added text about CORBA being an application service in an HA middleware stack and not a communications service. In a conceptual model of a middleware stack for highly available clustering, CORBA is considered an application service and not a messaging or clustering service. A distributed application may utilize a CORBA ORB for location transparency at the application layer, and the ORB may in turn utilized RSerPool for its communications layer.

4 rserpool-comp-06.ppt / 14 July 2003 / John Loughney DNS / SLP / ASAP / ENRP Minor changes: DNS – more text about needs in RserPool for handle to address resolution. SLP – improved text Updated ASAP / ENRP sections

5 rserpool-comp-06.ppt / 14 July 2003 / John Loughney L4/L7 Switching Got feedback from many sources that RserPool should consider this. Summary: Inadequate support for naming, as well as registration and deregistration services. Need to define a standard protocol to allow the switches to communicate amongst themselves and, perhaps, implement a co-resident name server on the switch. Deploy middle boxes as opposed to end-devices / peer-to- peer model. Usually requires specialized hardware. Lacks the ability to provide a robust framework for location transparent clustering capable of scaling in size and performance. Proprietary technology. Often service specific.