sebastian.rother () jpberlin ! de wrote
> I notice it for a while now that SVND is incredible slow related to WRITE
> SPEED. Also I do see a lot of "biowait" with top related to newfs for
> example.
>
>
> vnconfig -cK 8888 -S saltfile /dev/sd0d /dev/svnd1c
> disklabel -E svnd1
> -> a a
> -> r
> -> w
> -> q
> newfs /dev/rsvnd1a
There is certainly some slowdown for the encryption and extra filesystem
overhead, but you can minimize it by making both filesystems (the "upper"
one that sees plaintext, and the lower one that provides the underlying
storage) ffs/ffs2 mounted softdep. softdep gives a *big* speedup on
writes! Mounting with noatime as well may also help things a bit.
I have been running laptops (Lenovo Thinkpad T42) with /home mounted
this way for 6 months or so, and in ordinary use I don't notice any
particular slowdown relative to my previous laptop system. (Though
I haven't made any quantitative tests.)
ciao,
--
-- "Jonathan Thornburg [remove -animal to reply]"
<jth...@astro.indiana-zebra.edu>
Dept of Astronomy, Indiana University, Bloomington, Indiana, USA
"Washing one's hands of the conflict between the powerful and the
powerless means to side with the powerful, not to be neutral."
-- quote by Freire / poster by Oxfam
