Re: Dump Utility cache efficiency analysis

On 2009-Jun-23 15:52:04 -0400, Nirmal Thacker <thacker.nirmal@...> 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