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From "Marcelo F. Ochoa" <moc...@ieee.org>
Subject Re: Parallel content-aggregation
Date Wed, 14 Nov 2001 11:01:02 GMT
ndirks@s-und-n.de wrote:

>Hello,
>
>some more thoughts about parallel content-aggregation. I plan to use
>content-aggregation for aggregation of external data, caching has to
>be disabled because of frequent changes in the delivered data. Because
>the external xml-source is not very fast I expect the performance benefit
>of a
>parallel mechanism to be more than same milliseconds.
>
>The ordering of incomming SAX-Events could be handled by the separation
>of connect-phase and deliver-phase. During connect-phase (connecting to
>foreign host, waiting till first byte arrives) all threads work parallel,
>but the
>deliver-phase (streaming into handlers) is synchronized by a big lock
>shared
>between all threads.
>
>Thoughts ?
>
>Ciao
>  Nico Dirks
>
 I have the same situation with DB Prism Generator for Cocoon 2.
 I think that a parallelel content agregation could be produce a better 
response time of DB Prism architecture because all request return 
dynamic data (not cached).
 Dividing the generation in two phased ( Setup and Generated methods) 
for example:
  - If in the first phase Cocoon calls to Setup method of all the 
request in the agregation parts, this will be permit to DB Prism 
generator parallelizar all these request.
  - In the second phase Cocoon could be call to Generate method 
sequencially.
 Is it mechanism possible?
 Best regards, Marcelo.

-- 
Marcelo F. Ochoa - mochoa@ieee.org
Do you Know DB Prism? Look @ http://www.plenix.com/dbprism/
More info?
Chapter 21 of the book "Professional XML Databases" (Wrox Press 
http://www.wrox.com/)
Chapter 8 of the book "Oracle & Open Source" (O'Reilly 
http://www.oreilly.com/catalog/oracleopen/)
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