lxnf9...@comcast.net wrote:
On Thu, 26 Aug 2010, lxnf9...@comcast.net wrote:
On Thu, 26 Aug 2010, Dan Frincu wrote:
In OpenAIS for example, in /etc/ais/openais.conf you have a directive
called interface. In this directive you specify a ringnumber,
bindnetaddr,
mcastaddr and mcastport. Configuring 2 communication channels means
using
adding rrp_mode: passive, ringnumber 0 and ringnumber 1, two interface
directives in which you use different bindnetaddr IP addresses (ex:
10.0.0.1 and 10.0.0.2, or whatever IP's you use, but preferably
each IP
address should be assigned to a different network interface), two
different mcastaddr multicast groups (or mcastport, but I'd recommed
different mcastaddr's in the range of 239.x.x.x).
The principle behind it is if one communication channel (network
card, IP
address connectivity, multicast group/port) fails, the other one is
still
there for redundancy. I see this similar to the way ring network
topologies work, without the token.
Regards,
Dan.
p.s.: Andrew, nice to have you back, to paraphrase a famous quote "Mr.
Anderson. Welcome back, we missed you."
Thanks that helps a lot
Just one more thing
If two interfaces are configured are they both used equally
Richard
I believe I can answer my own question
http://www.novell.com/documentation/sle_ha/book_sleha/?page=/documentation/sle_ha/book_sleha/data/sec_ha_installation_setup.html
Use the Redundant Ring Protocol (RRP) to tell the cluster how to use
these interfaces. RRP can have three modes (rrp_mode): if set to
active, Corosync uses all interfaces actively. If set to passive,
Corosync uses the second interface only if the first ring fails.
Richard
Also see http://linux.die.net/man/5/openais.conf
rrp_mode
This specifies the mode of redundant ring, which may be none,
active, or passive. Active replication offers slightly lower latency
from transmit to delivery in faulty network environments but with
less performance. Passive replication may nearly double the speed of
the totem protocol if the protocol doesn't become cpu bound. The
final option is none, in which case only one network interface will
be used to operate the totem protocol.
If only one interface directive is specified, none is automatically
chosen. If multiple interface directives are specified, only active
or passive may be chosen.
lxnf9...@comcast.net wrote:
> The DRBD manual says
> > It is absolutely vital to configure at least two independent
OpenAIS
> communication channels for this functionality to work correctly.
> > My Google'n has not yielded any results in the how to do this
> department
> I have DRBD configured and working properly with one channel
> Where can I find info to add a second channel
> > Richard
> > _______________________________________________
> Pacemaker mailing list: Pacemaker@oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > Project Home: http://www.clusterlabs.org
> Getting started: >
http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs:
>
http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
--
Dan FRINCU
Systems Engineer
CCNA, RHCE
Streamwide Romania
_______________________________________________
Pacemaker mailing list: Pacemaker@oss.clusterlabs.org
http://oss.clusterlabs.org/mailman/listinfo/pacemaker
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
