I believe that you can enable broadcast for heartbeats by changing the following value from multicast to broadcast in /etc/cluster/cluster.conf on all clustered nodes. The CMAN service will need to be restarted on each node as well. Be sure they become quorate again with the following command below.
We run two p5 nodes running AIX 5L in a cluster mode (HACMP), both the nodes share external disk arrays. Only the primary node can access the shared disks at a given point of time.
We are in the process of adding two new disks to the disk arrays so as to make them available to the existing... (3 Replies)
Hello,
I have a quick question regarding POWER HA ( HACMP ) 5.5 ;
I have four ethernet adapters
en0
en1
en2
en3
en0 is configured as BOOT_IP with IP address
all other ethernet adapters are empty en1 / en2 / en3
so when I configure the service IP and start HACMP , the service IP... (2 Replies)
Hi,
I have a IBM Power series machine that has 2 VIOs and hosting 20 LPARS.
I have two LPARs on which GPFS is configured (4-5 disks)
Now these two LPARs need to be configured for HACMP (PowerHA) as well.
What is recommended? Is it possible that HACMP can be done on this config or do i... (1 Reply)
I just had this idea of using Android (a linux derivative) to monitor heart rates of patients with a history of cardiac problems. There are plenty apps around that monitor heart rates, but none for people that require medical attention when their heart rate drops below a certain level for more... (0 Replies)
Hi everyone. Our professor in Operating Systems gave us a research work about the Heart OS and Love OS. We were told that they were old operating systems from UNIX but I couldn't find any information about them from google. I hope someone here could point me to the right direction. Thanks! (7 Replies)
Hello,
can someone please suggest me in configuring the mysql db on redhat cluster, I have few questions.
1. where do I have to configure heart beat links, and is there any file in the redhat cluster that we update it to use these ipaddress and these interface on the node.
2. I am configuring... (0 Replies)
Discussion started by: bobby320
0 Replies
LEARN ABOUT DEBIAN
votequorum_overview
VOTEQUORUM_OVERVIEW(8) Corosync Cluster Engine Programmer's Manual VOTEQUORUM_OVERVIEW(8)NAME
votequorum_overview - Votequorum Library Overview
OVERVIEW
The votequuorum library is delivered with the corosync project. It is the external interface to the vote-based quorum service. This service
is optionally loaded into all ndes in a corosync cluster to avoid split-brain situations. It does this by having a number of votes assigned
to each system in the cluster and ensuring that only when a majority of the votes are present, cluster operations are allowed to proceed.
The library provides a mechanism to:
* Query the quorum status
* Get a list of nodes known to the quorum service
* Receive notifications of quorum state changes
* Change the number of votes assigned to a node
* Change the number of expected votes for a cluster to be quorate
* Connect an additional quorum device to allow small clusters to remain quorate during node outages.
votequorum reads its configuration from the objdb. The following keys are read when it starts up:
* quorum.expected_votes
* quorum.votes
* quorum.quorumdev_poll
* quorum.disallowed
* quorum.two_node
Most of those values can be changed while corosync is running with the following exceptions: quorum.disallowed cannot be changed, and
two_node cannot be set on-the-fly, though it can be cleared. ie you can start with two nodes in the cluster and add a third without reboot-
ing all the nodes.
BUGS
This software is not yet production, so there may still be some bugs.
SEE ALSO corosync-quorumtool(8), votequorum_initialize(3), votequorum_finalize(3), votequorum_fd_get(3), votequorum_dispatch(3), votequorum_con-
text_get(3), votequorum_context_set(3),
corosync Man Page 2009-01-26 VOTEQUORUM_OVERVIEW(8)