I need to do more research on PB. Are you saying that PB can function
as a HTTP load balancer?
No. The use-case I have in mind is that you already have an application with an existing load balancer. When you add full-text indexing to your application, you have another server setup with nxlucene. The web servers query that server for data.
Of course, xmlrpc is one way to query them, but it has some drawbacks. One connection can only handle on concurrent request, and with HTTP/1.0, only one request. With pb, besides some improvements in the binary nature of the protocol, you can handle hundreds (thousands?) of queries with one connection. So having one permanent connection instead of thousands of transient connections gives you some scalability advantages.
-Ken
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