Re: Problem with 2.6 kernel and lots of I/O

[Kyle Moffett]

On May 31, 2005, at 15:00:46, Roy Keene wrote:
> I had not heard of "DRBD" before now, but it looks interesting.
> I am looking into it further.

For DRBD, I recommend first installing DRBD, then setting up and
installing Heartbeat.  On Debian the process is something like
the following:

# apt-get install kernel-package kernel-source-${VERSION} drbd0.7- 
module-source drbd0.7-utils heartbeat
# cd /usr/src
# tar -xjf kernel-source-${VERSION}.tar.bz2
# cd kernel-source-${VERSION}
# cp /boot/config-${VERSION}-whatever ./.config
# make-kpkg --revision ${REVISION} --append-to-version -$ 
{MOREVERSION} --added-modules drbd --config oldconfig --us --uc  
configure modules_image
# dpkg -i /usr/src/drbd0.7-module-${VERSION}-${MOREVERSION}_$ 
{DRBD_VERSION}+${REVISION}_${ARCH}.deb

Then read the heartbeat docs to make yourself a /etc/ha.d/haresources
file.  Mine looks like this:
  # Address monarch.csl.tjhsst.edu, Kerberos master, LDAP master
  king    IPaddr::198.38.19.1 Kerberos::TJHSST.EDU::CSL.TJHSST.EDU

  # webkdc.tjhsst.edu
  king    IPaddr::198.38.19.2

  # weblogin.tjhsst.edu
  king    IPaddr::198.38.19.3

  # cups.csl.tjhsst.edu
  king    IPaddr::198.38.19.8

  # mirror.tjhsst.edu
  king    IPaddr::198.38.19.9

  # AFS volumes
  king    drbddisk::afs0  AFSMount::/vicepa
  emperor drbddisk::afs1  AFSMount::/vicepb

NOTE: AFSMount is a custom heartbeat script, and I use a slightly
modified drbddisk script as well.


Cheers,
Kyle Moffett

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