Date: Wed, 24 Jun 2009 13:59:07 -0400 From: Nirmal Thacker <thacker.nirmal@gmail.com> To: Peter Jeremy <peterjeremy@optushome.com.au> Cc: freebsd-hackers@freebsd.org Subject: Re: Dump Utility cache efficiency analysis Message-ID: <87429ffe0906241059x5e2d083bo626d4ba0c9b1cd44@mail.gmail.com> In-Reply-To: <20090624075811.GA463@server.vk2pj.dyndns.org> References: <87429ffe0906231252j7c84489dt6ebd60333654f411@mail.gmail.com> <20090624075811.GA463@server.vk2pj.dyndns.org>
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Thanks for all the replies and suggestions I ll begin by running, benchmarking, understanding dump for myself and take up Matt's suggestions above to understand the unified caching implementation in more detail -n On Wed, Jun 24, 2009 at 3:58 AM, Peter Jeremy <peterjeremy@optushome.com.au>wrote: > On 2009-Jun-23 15:52:04 -0400, Nirmal Thacker <thacker.nirmal@gmail.com> > wrote: > >I would first like to understand the opinions of anyone who has looked at > >this problem or think this would be a worthwhile project to start off > with. > > I'm aware of the following references: > http://www.mavetju.org/mail/view_message.php?list=freebsd-hackers&id=375676 > > http://www.mavetju.org/mail/view_thread.php?list=freebsd-stable&id=1335519&thread=yes > > >1. Installing a stable FreeBSD build > >2. Check out a version of the Build suitable for the project > > Any changes will need to apply to FreeBSD -current, though they may be > back-ported once tested. This means that you will need a -current > system at some point. 8-current is reasonably stable at this point and > would be my suggestion. > > >3. Pointers to begin studying the current implementation in the code-tree > >structure (would I expect it to lie in the fs/ directory?). I tried to > find > >it in the FreeBSD cross reference (http://fxr.watson.org/) > > The code is in src/sbin/dump. It references various system header > files in order to understand the UFS on-disk format. > > >Lastly- does this project require the know-how's of device drivers? If so, > I > >would have to work harder. > > No. Dump is completely userland. > > -- > Peter Jeremy >
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