:basically obsolete. As I understood it, the regular file system has
:sophisticated caching built in and effectively acts like a memory file
:..
:
:I noticed Matt Dillon wrote a handbook section on the VM system at
:http://www.freeBSD.org/handbook/internals-vm.html that includes
:some info on tuning, but it doesn't mention what to do with /tmp.
:
:So what's the bottom line? Should I leave /tmp on the root file
:system, create a dedicated partition for /tmp, or mount the
:swap partition on /tmp using the MFS?
:
:Thanks,
:
:Allen
What I do is make /tmp a softlink to /var/tmp, and make /var/tmp its
own partition.
I turn softupdates on on all my partitions, including root (you can do
that now)
I do NOT use MFS or MD for /tmp, nor do I leave it on /. I keep it as
a separate partition and combine it with /var/tmp because both /tmp
and /var/tmp tend to be used interchangeably anyway, and /tmp
(or /var/tmp) is the most likely of all your partitions to get filled
up accidently and you don't want that interfering with other things if
it happens. Many things use /tmp, so you can wind up with megabytes in
it which makes it unsuitable for use with MD and inefficient when used
with MFS.
Typically I configure my paritions as follows:
/ 128MB
swap (2x main memory, 128MB minimum)
/var 128MB (minimum, more if using machine for mail/printing)
/var/tmp 128MB (minimum, more if using machine multiuser)
/usr 2G
/home remainder of disk
/tmp softlink to /var/tmp
/compat softlink to /usr/compat
Even though '/' per say only needs 64MB, having 128MB there is useful.
I've seen 64MB / partitions 'fill up' with softupdates turned on when
doing an installworld (because softupdates doesn't delete the files
being replaced fast enough), and I tend to keep debug kernels sitting
around in / as well.
I make /usr big (2G) in order to accomodate ports, since /usr/local
is part of /usr.
The ordering of the partitions is also carefully arranged. The lower
sector numbers are the 'faster' sectors on a disk, closer to the outer
rim of the disk where transfer rates are much faster. So I put swap
there along with the smaller partitions, and put /usr and /home later
since those partitions are big enough that you really don't get a
uniform performance benefit anyway.
-Matt
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