[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Xqueeze: Compact XML Alternative
From: "Mike Champion" <mc@x...> > Here's just a couple tidbits from today's surfing > http://www.bea.com/events/webservices/Bosworth_WSRC_Jan03.pdf -- an Adam > Bosworth "vision thing" piece. Note p. 43 about XML databases (and > obviously the middleware and applications they support) serving up XML > messages/fragments/state thousands of times per second. How sure are we > that bandwidth/parsing performance is not a bottleneck in such a scenario? Databases servers manipulate data in some binary structure. The ideal for performance is for a database server to offload as much rearranging as possible to the closely-coupled middleware (i.e., in a typical three-tier architecture). For example, Oracle's JDBC drivers present an standard interface on the middleware, but talk some specific and presumably efficient way to the database server. The traditional architectural answer to when you want to uncouple the front-end from the back-end it to introduce a middle layer (or front-end processor to the server.) Maybe the same is true even of Web Services*: the Web Service runs on some middleware talking XML to the outside world, and that middleware should talk some optimized proprietary code to its (tightly-coupled) server, with the interface to the Database at the server being document objects (or whatever XML-ish thing is needed.) This is why I am a little puzzled by public standard binary formats: the strategy needs to be to offload processing to a FEP or middleware server, and that needs to be tightly coupled to the binary particulars of the database system. Which is not to say that binary format X might not be just what the doctor ordered for tightly-coupled server->middleware protocol from vendor Y. Which makes me wonder whether one of the value of binary formats is to provide a greater range of solutions to developers of tightly-coupled, probably-proprietary protocols? Cheers Rick Jelliffe * and individual filters in a distributed pipeline
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