mfs and buildworlds on da SunFire x4600

[Mars G. Miro]

On 5/8/07, Oliver Fromme <olli at lurza.secnetix.de> wrote:
> Mars G. Miro wrote:
>  > Actually, it's not about having to finish building da world in da
>  > smallest amount of time, it's about whether mfs would really speed
>  > things up...
>
> I've made similar tests in the past, and my conclusion is
> that it's not worth it.
>
> Using a memory disk for /usr/obj doesn't make much sense,
> because soft-updates decouples the physical writes pretty


as i've mentioned in my original email, da mfs's were created w/
softupdates turned off


> well from the build process.  On the other hand, using a
> memory disk for /usr/src _might_ help a little, but it
> depends on a lot of things.  Especially if you have a


again, both /usr/src and /usr/obj were mfs, and even async, noatime

> speedy I/O system and plenty of RAM (so all of the files
> can be cached) and /usr/src is mounted with the "noatime"
> option, the difference is very small.
>

as Kris mentioned, a buildworld isnt prolly da appropriate test for
mfs, as for da chrooted /usr or da buildkernel tests, I havent really
tried them --- will try to do so and report back when i get da time
...

btw, a buildworld on da x4100s takes just about da same times ~ 18mins...

> By the way, please stop writing "da" instead of "the".  It
> looks childish and makes your mails difficult to read, so
> it might prevent people from helping you.
>

oops. d0h ;-)

> Best regards
>    Oliver
>
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cheers
mars