how to use the MFS ?

[PstreeM China]

i think the option WRKDIRPREFIX  is a good idea , and i whill test the
methon unionfs.

but i want to know , after i mount the unionfs , like this :#mount -t
unionfs  /usr/ports /usr/ports.real
the /usr/ports is  memery FS, what can i used to install software ??
go to the dir : /usr/ports/**/** to install ,
or go to dir dir : /usr/ports.real/*/* to install ??

thank all!!

On Fri, Jan 9, 2009 at 6:14 PM, chris.scott <krad at snaffler.net> wrote:

> Wojciech Puchar wrote:
>
>> hi all:
>>>
>>>     i want to know ,how to compile better speed during the installation
>>> of
>>> Ports , use the memery filesystem(MFS) ..
>>>
>>>     during make world , mount the md0 to /usr/obj , but what can i do for
>>>
>>
>> better use tmpfs
>>
>>  the port ?
>>>
>>
>> rm -rf /usr/ports/
>> mkdir /usr/ports
>> mount -t tmpfs tmpfs /usr/ports
>> portsnap extract
>>
>> now build
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>>
>>  quicker to do
>
>
> mv /usr/ports /usr/ports.real
> mkdir /usr/ports
> mount -t tmpfs tmpfs /usr/ports
> mount -t unionfs -o noatime /usr/ports /usr/ports.real
>
>
> of cause tmpfs can actually start using disk space unlike a md device so if
> you eat up to much ram with the compiles it will slow down
>