c++ - Isapi filter - state -

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i have isapi filer , want add logic based on incoming domain ( server farm hosts many domains). there domain list dynamic , can export these domain list text file , read isapi , there way keep file in memory (is array or linked list) save io call. similar global application state .

how worker processes distributed across servers? have 1 server 1 worker process, or multiple servers?

  • if have 1 server 1 worker process, can read file static array or string manage (just make sure account concurrent threads reading/modifying simultaneously)

  • if have multiple worker processes on 1 server, can use named shared memory. i've used before in isapi filters share information, , works pretty well. should take care of concurrency you. can read more here: http://msdn.microsoft.com/en-us/library/aa366551%28v=vs.85%29.aspx

  • if you're spread across multiple servers, use distributed cache memcached. more complex set up, it'll give performance. there's thread on setting here: c++ api memcache


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