>> 1) How did we share it in forked (apache 1.3) env ?
>> => shared memory => MM or APR
>
>APR of course: MM is included in it.
But APR is only available in Apache 2.0, what about Apache 1.3,
NES and IIS ? And MM is still only for Unix OS ....
>>
>> 2) Ditto in a threaded architecture (Apache 2.0)
>> at least in MPM mode (a forked child which will in turn thread
>> child), but again how did we info we other forked.
>>
>> Also doubling the socket, will double the descriptors open
>> and will be a problem under heavy load.
>> In an HTTP architecture we need again to mix data (tons of
>> messages) with control (very low traffic). And so we need
>> to read for possible message at some time.
>>
>> 1) FORWARD REQUEST FROM WEB-SERVER TO SERVLET ENGINE
>> 2) WAIT FOR END OF PREVIOUS REPLY AND EVENTUALLY ADMIN MESSAGE
>> 3) GET ADMIN MESSAGE and evnetually RESPONSE
>> 4) GET RESPONSE AND FORWARD TO WEB-SERVER.
>>
>> The admin message could be send() in socket at any time and
>> will be handled when a request will came....
>
>Apjp13 requests are not multiplexed, so we need more that one
>connection. How
>could we decide on which connection we send the admin message?
>Otherwise we will
>the send the same data more than once.
The admin response could be sent on EACH AJP13 connections, and
it will be web-server task to discard allready received admin
message...
>What happends when the configuration is changed more than once
>and no request
>happend in the meantime...
>We could get a wrong configuration...
If we have a DOWN event and then a UP event, the servlet
engine send a DOWN message and then a UP message. The
web-servlet will have to read ALL ADMIN messages and
process the whole block...
