RE: Sysinstall automatic filesystem size generation.

From: Darren Pilgrim (dmp_at_bitfreak.org)
Date: 08/29/05

  • Next message: C. Michailidis: "Re: Sysinstall automatic filesystem size generation." 
    To: "'C. Michailidis'" <dinom@balstonresearch.com>, <freebsd-stable@freebsd.org>
Date: Mon, 29 Aug 2005 01:24:19 -0700

    From: C. Michailidis
    >
    [sysinstall FS sizing defaults]
    >
    > <...> Isn't it safe to make some of the default sizes a
    > wee bit larger? That is, a 256mb /tmp and /var doesn't seem
    > "appropriate" if you have one of these massive modern disk
    > drives. For christ's sake, I'd gladly give up a GB or two of
    > /usr so I could build openoffice without needing to consider
    > that I may need an extra few megabytes in /var at the time of
    > the system install.
    >
    <...>
    >
    > Wouldn't it be smart to remove the hardcoded default sizes
    > altogether and dynamically generate them according to a
    > reasonable function?

    Probably, but a template for something like this isn't simple unless
    it's created as part of a general profile-based installer that would
    inform sysinstall of the machine's purpose in life. For example, a
    "workstation or Windows replacement" would need several extra GB in /usr
    whereas a server would get away with a much smaller /usr, but need those
    extra file-systems for logs, spools and other data.

    There are, however, some basic constants:

    If /usr, /var and /home are on another file-system, / doesn't need to be
    more than 150-200 MB. There just isn't that much in the root
    file-system.

    Assuming the default log retention and no spooling, /var will likely
    never grow past 50MB. Adding a mail, web, db or log server or
    increasing log retention will go well past that mark, but then such
    servers should have subordinate file-systems to handle the extra data.

    What comes with the OS will take less than 300MB in /usr. /usr/src and
    /usr/obj eat around 500 MB each. /usr/local eats around 1 GB for most
    servers and 3 GB on a desktop. /usr/X11R6 is empty if X isn't
    installed, the base Xorg server package is a few hundred MB and a
    desktop can need several GB. /usr/ports should have 1-2 GB just for
    distfiles on a desktop built from ports and 3 GB for work if you're
    building something huge, like KDE. I size /usr/ports to 6 GB on my
    desktop machines.

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