[geeks] Solaris resiliency to crashing w/full root partition?

Sandwich Maker adh at an.bradford.ma.us
Wed Sep 28 16:36:47 CDT 2005


" From: "Michael Horton" <Michael.Horton at acntv.com>
" 
" solaris 8, 9, 10 will not crash with a full root partition!

iirc this was first trumpeted for sVr3, and i'm pretty sure i
personally observed at least one non-crash [/dev file oops].

if i'm right, solaris2 would've had this from its beginning.

also as i recall this was attributed to kernel logging routines which
would hang appending to files when they couldn't get more space.

" sun recommends one large root partition and a swap partition!
" 
" your sun support provider can provide this information.
" 
" solaris 8, 9, 10 reserve enough space so that root can log into a sun
" box and delete files.
" 
" this applies to the root partition and may not apply to other partitions
" (such as mounted oracle/san partitions).

iow only for bsd ffs-derived fs, not for raw or other formatted
volumes.

" the freespace variable is also tunable and can be increased to suit your
"   site's specific needs.

but it won't stop root-owned daemons from filling /, and i'm pretty
sure i have also experienced at least one root-filled sunos4 crash.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought



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