[linux-lvm] Mirroring implementation

[Lars Ellenberg]

On Mon, Jul 27, 2009 at 06:56:28AM -0700, malahal at us.ibm.com wrote:
> brem belguebli [brem.belguebli at gmail.com] wrote:
> >    Hi,
> >    I have a few questions concerning LVM mirror implementation, and I
> >    couldn't find any suitable design doc
> >    I need to setup a dual site ( a few miles between the 2 sites, around 1 ms
> >    RTD) mirror based cluster system.
> 
> You need asynchronous mirroring (remote replication module). This is not
> in mainline (not sure if included in the latest RHEL release). The
> following comments apply to dm-mirror module that is already in the
> mainline.

There is also MD RAID1, see man mdadm, the --write-mostly and --write-behind options.

And of course, DRBD http://www.drbd.org
which is not RAID1 turned into replication,
but a dedicated replication solution.

-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com