Date: Mon, 23 Mar 2009 17:33:50 +0100 From: Mel Flynn <mel.flynn+fbsd.fs@mailing.thruhere.net> To: freebsd-fs@freebsd.org Subject: Trying to understand how aio(4), mount(8) async (and gjournal) relate Message-ID: <200903231733.51671.mel.flynn%2Bfbsd.fs@mailing.thruhere.net>
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Hello list, in an effort to try and understand the various async systems available, it's unclear to me how (if at all) the above relate. If one mounts a disk with async, does this internally use aio system calls, or is there a subsystem available which does largely the same? If so, why are there 2 subsystems? When using aio, for example with squid, does this mean the underlying provider needs to be mounted async or is this totally unrelated? Similarly if said disk is on a gjournalled partition, is the async mount redundant or is using aio redundant or neither? The systems themselves are properly documented - I just couldn't find any info on how they relate, or why they are unrelated. -- Mel
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