Johan Ekenberg wrote:
>
> > No-one swaps to md devices, except raid-1 and that only, if one really,
> > really needs it. It's just too slow.
>
> Is it really that slow? The md-devices are faster than a regular disk (I use
> RAID 5).
<snip>
faster than a single disk: yes.
faster than normal swapping: no.
Normally, if you have the option to swap to md devices, you have more
than one disk. The non-md way of swapping would then be:
root# grep swap /etc/fstab
/dev/sda9 swap swap defaults,pri=1 0 0
/dev/sdb9 swap swap defaults,pri=1 0 0
/dev/sdc9 swap swap defaults,pri=1 0 0
i.e. somthing like a raid0 device setup. You know that raid0 is fastest
of all raid levels when the access pattern is something like 50-50 r-w
and small blocks. So any other raid level used will slow things down.
Marc
--
Marc Mutz <[EMAIL PROTECTED]> http://marc.mutz.com/Encryption-HOWTO/
University of Bielefeld, Dep. of Mathematics / Dep. of Physics
PGP-keyID's: 0xd46ce9ab (RSA), 0x7ae55b9e (DSS/DH)
