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directio question

Source:  gmane.comp.web.nginx.english on Mar 7 2010 5:07pm   more from feed

Hi, My name is Stefan Parvu, Im working on http://www.systemdatarecorder.org and I have started to test and consider replacing for our solution apache over nginx. Im getting to know nginx and I like the server. Some question reading over http://wiki.nginx.org/NginxHttpCoreModule about DirectIO: "The directive enables use of flags O_DIRECT (FreeBSD, Linux), F_NOCACHE (Mac OS X) or directio() function (Solaris) for reading files with size greater than specified. This directive disables use of sendfile for this request." DirectIO in Solaris is a feature, when enabled lets you to bypass entirely the OS's page cache and read/write directly from/to disk. This has some benefits where workloads are database servers and you want to avoid double caching. Im a bit curious under what situations would like to have DirectIO enabled on nginx and are we talking about same thing when we refer to directio ? http://www.solarisinternals.com/wiki/index.php/Direct_I/O Usually most applications will benefit of having

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