Quorum Server Redundancy Question

Hi All,
I'm just investigating my options for a new cluster configuration and was trying to find out about multiple quorum servers hosts. All the examples I have come across in the documentation have 1 physical host acting as a quorum server for an n+1 node cluster. I'm ssuming that there will be quorum issues in the event the physical host, hosting the quorum server, is down and the cluster nodes performed a reconfiguration/switch when the quorum server was unavailable.
Is it possible to have 2 physical hosts, with quorum servers defined on each, that can then be confidured in to the cluster. Effectivly pointing at two different quorum servers for votes?

Correct, the QS is only used if the cluster changes state, i.e. nodes leave or join. However, having more than 1 QS for a single cluster does not help. You simply lower your overall availability because there are more failure scenarios where one of these is down, leading to insufficient votes for the remaining cluster node to obtain.
Active monitoring and prompt repair of the QS (or QD) is the right approach.
Tim
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Quorum Server Question

Hi All,
If using two or more clusters, can cluster nodes be quorum servers for
for other clusters?
/Regards
Ulf

Yes, if is feasible. There have been discussions internally about the possibility of making an HA quorum server. Personally, I'm not sure of the value of doing this as you need to guard against the possibility of correlated failured that cause everything to fail in a cascading manner.
Tim
---

Lync 2013 FE quorum server

Hi,
1. how i can check which is the perimary quorum server in the FE pool lync 2013 ?
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Thanks,

1. Get-CsPoolFabricState will get you the node order. 2. You can't. Well not that I've been able to work out. The only option is to reset the fabric, which you can do of you run into issues with services not starting as a result of fabric issues.
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Lost quorum using quorum server

I have a two node cluster with a third node being used as a quorum server. The quorum server is on a different VLAN than the cluster nodes.
If I shut down or reboot node 1, node 2 dies. I can reboot node 2 without any impact on node 1, it works as it's supposed to. In this scenario the nodes seem to be unable to talk to the quorum server so the cluster thinks its lost quorum and it dies. After it is back up the quorum server is corrupt and shown as offline so the only way to restore it is to remove it from the cluster and readd it.
Node 2 never seems to be able to see the quorum server, it always shows it as offline, even when I add it from node 2. Node 3 is not a cluster configured server, it only has the quorum server installed on it to support the cluster of node 1 & 2. Node 3 is on another vlan, therefore there is a router in the path.
Does the quorum server have to be on the same VLAN so that there's no router in the loop?
Does anybody have any ideas on what could be wrong here? Does the quorum server really work or do I have to add a third server to the cluster just to have a stable cluster?
--- Further info, the clqs show command on node 3 shows disabled false, and keys for node 1, but nothing for node 2 and node 2 can't open the qs.
Thanks,
Terry
Edited by: taccooper on Jan 21, 2010 4:00 AM
Edited by: taccooper on Jan 26, 2010 3:58 AM
Edited by: taccooper on Jan 26, 2010 6:19 AM

I may have answered my own question by applying patch 127406-04. With this patch applied both cluster nodes are now seeing the quorum server. The patch among other things solves an issue with simultaneous opens failing. I will have to do some failure testing to confirm this.
Update: failure testing complete, this patch solved the issue.
Terry
Edited by: taccooper on Jan 27, 2010 5:20 AM

SC3.2 Quorum Server in S10 container?

Hi,
Is it possible to have a single server act as a quorum device for several (test / development) clusters? If it's not supported by the software, perhaps by installing multiple copies of the software within S10 zones?
TIA. Tom

Hi Tom,
It is supported and documented in http://docs.sun.com/app/docs/doc/819-5360
you just have to add separate lines in /etc/scqsd/scqsd.conf and differentiate by instance name and port.
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We are running Oracle 9iR2 with OLAP.
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We will be switching to 2x 1.6ghz 64bit opteron boxes this year sometime as well.

Clq status shows quorum server offline even though the clq service is runni

Hi,
In a 2 Node + 1 QS sun cluster 3.2 cluster, clq status is showing quorum sever offline even though the clq process is running on the quorum server. to make the quorum server online, i have to either remove and add the quorum server from cluster, or incase if there is a failure on any one of the node's both th nodes will reboot and once both joined to the cluster, I can see clq status showing quorum server online!!!
Why is the quorum server going offline automatically?
Any help would be highly appreciated
Many thanks in advance
Ushas Symon

Hi,
I asssume you mean the scqsd process is running on the QS, right?
A QS is shown as offline, it the monitor could not reach it when it last tried. This is usually due to a networking problem.
If you issue a clq status, the monitor checks again and if it can reach the QS will change its status back to online.
If this does not happen, check your logs, what kind of error message showed up.
Does clqs show on the QS show the correct information?
It is obvious, that if a node dies and the QS has been offline prior to the node death, that the other node will die as well due to lack of quorum, i.e. it has less votes than needed. You seem to have a basic networking problem or something is really wrong with your QS.
Regards
Hartmut

Quorum Server Bug?

I have a 2 node cluster using a quorum server running on a third server. I turned off one node this morning, and then used svcadm to disable the quorum server on the third server. THis was in an attempt to panic the remaining node for testing purposes.
It's been about 20 minutes now, and the remaining node has not panicked from losing quorum. clq status and scstat -q show essentially the same things, though in diffent formats. There are 2 votes needed, 2 present, and 3 possible. Under the details, the first node has 0 votes present, the up node has 1, and the disabled quorum server has 0.
cletus# clq status
Cluster Quorum ===
--- Quorum Votes Summary ---
            Needed   Present   Possible
            2        2         3
--- Quorum Votes by Node ---
Node Name       Present       Possible       Status
brandine        0             1              Offline
cletus          1             1              Online
--- Quorum Votes by Device ---
Device Name       Present      Possible      Status
hwi_san_qs        0            1             Offline
cletus# scstat -q
-- Quorum Summary --
Quorum votes possible:      3
Quorum votes needed:        2
Quorum votes present:       2
-- Quorum Votes by Node --
                    Node Name           Present Possible Status
Node votes:       brandine            0        1       Offline
Node votes:       cletus              1        1       Online
-- Quorum Votes by Device --
                    Device Name         Present Possible Status
Device votes:     hwi_san_qs          0        1       Offline
cletus# cletus# clq status
    1             1              Online
--- Quorum Votes by Device ---
Device Name       Present      Possible      Status
hwi_san_qs        0            1             OfflineCould this be a bug with quorum math when used with quorum server? Is it related to me using svcadm to shut down the quorum server gracefully?

To add what Tim has described. The improved quorum monitoring feature will detect that you shut down the quorum server, but will not panic the remaining node. Why should it? It knows it is the only node left and can safely continue to run. When the second node failed it had enough votes to reconfigure!
Regards
hartmut

Clq status shows quorum server offline eventhough it is online

Hi,
I am facing a problem in my cluster that when I bring all the three nodes in a cluster (2 app-nodes and one quorum server) at almost the same time, the clq status on any of the cluster nodes is showing quorum server as offline. when I do the clqs show on the quorum server, i ge the below output.
clqs show
=== Quorum Server on port 9000 ===
--- Cluster beacluster (id 0x4916625B) Reservation ---
Node ID: 1
Reservation key: 0x4916625b00000001
--- Cluster beacluster (id 0x4916625B) Registrations ---
Node ID: 1
Registration key: 0x4916625b00000001
Node ID: 2
Registration key: 0x4916625b00000002
this is cluster 3.2
any inputs will be appreciated
Thaks in advance
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Hi, this is solaris cluster 3.2u1..
I got the quorum server online by
# clq status
--- Quorum Votes by Device ---
Device Name Present Possible Status
rac1 1 1 Offline
# clq add -t quorum_server -p qshost=xxxxxxxxxx -p port 9001 rac2
# clq status
--- Quorum Votes by Device ---
Device Name Present Possible Status
rac1 1 1 Online
rac2 1 1 Online
By just adding one another QS both the QS status came online !!!!!!!!!!!!
no IDEA, what is happening...
anyways I have deleted the second QS by #clq remove rac2 and #clq reset
now it is fine..
Thanking you all
Ushas Symon

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Hi Community,
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Hello,
I'll start by admitting I'm from a mainly Windows Server background and am slowly learning Mac OSX Server.
We have two Mac Mini servers, a primary and a backup, due to a unrelated issue we need to rebuild the server. So I'm planning to rebuild the backup as the main server. I have a few questions, any help or advice would be really appreciated.
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I will give some insight into the Pegasus.
3) Assuming I get the OS reinstalled, server.app installed, open directory running. There's a Promise Pegasus disk array attached to the current server. This will need to be unmounted, then re-mounted on the new server. Is this as simple as plug and play? The current server has a "Promise utility" but this looks like its mainly for monitoring the array. Does this need to be installed to access the drive?
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Apple Consultants Network
Author "Mavericks Server – Foundation Services" :: Exclusively available in Apple's iBooks Store
Author "Mavericks Server – Control and Collaboration" :: Exclusively available in Apple's iBooks Store

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http://technet.microsoft.com/en-us/library/jj219435(v=office.15).aspx#viewers
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No, you should publish to both internal and Internet on the same server, it's just how it's done with Lync. You can't really have two with Lync for this purpose anyway. Users will upload PowerPoint presentations to it when it's time to share,
no editing is possible, and the risk is generally minimal. You can shorten the cache time to help if you're concerned.
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Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer".
SWC Unified Communications

Mail server setup question on mini server

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Is 500G hard-disk enough for storedata? After two or three years, incase 500G already not enough for store all email data, Could I have any solution for this issue? My company has around 100 email user.
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Is 500G hard-disk enough for storedata?
How long is a piece of string?
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Looks like the server is unable to connect to the dehydration database.
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Quorum Server Redundancy Question

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