Date: Mon, 1 Apr 96 23:21:27 +0200 From: cracauer@wavehh.hanse.de (Martin Cracauer) To: angio@shell.ARos.NET Cc: freebsd-hackers@freebsd.org Subject: Re: "active" (INND14unoff4,shared) gets corrupted Message-ID: <9604012121.AA05029@wavehh.hanse.de> References: <199603311506.BAA21645@asstdc.scgt.oz.au> <199603312053.NAA28795@shell.aros.net>
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angio@shell.ARos.NET (Dave Andersen) wrote: >Baffling -- I use both sharedactive and MMAP and get perfect performance >out of both, especially sharedactive. We're using unoff2 with >sharedactive, and the memory usage is *heavenly*, and the readers are >100% reliable. I've been told that the problem is that corruption occurs when two process try to write a file at the same time, one updating it in preexisting space and one appending to the file, extending it's size. That makes it possible that mmap'ed INN fails for low-load sites (when more than one client may send articles) and to work on heavyly-loaded servers (when only one client at a time sfeeds news to the server and the rest is "consumer"). Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer <cracauer@wavehh.hanse.de> - BSD User Group Hamburg BSD, Lisp and other programming info http://www.bik-gmbh.de/~cracauer
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