Increase heartbeat for virtualized nodes?

hello,
we have a 3node ncs with sles10sp3 + oes2sp3 (64bit).
all servers are virtualized (vmware).
We had to remove the servers from the vranger backup, because the creation of snapshots for the backups regularly kills our non-master nodes. They are then on 100% cpu load and not responsive. The time we received cluster notifications about failed nodes was exactly the time that vmware was creating snapshort for the automatic backups.
Removing the vms from backups solved the problem.
Now my questions is:
Is it a good idea to increase the tolerance for heartbeat & watchdogs to perhaps something like 16 or 32 seconds?
Has someone any experience on this subject?
thx,
hugo

If you experience false alarms a lot, you may want to increase the tolerance.
From your description, its a legitimate case for fencing a node.
Increasing the tolerance can reduce false alarms. But it will also prolong resource downtime in case a node is having real problems.
Best regards,
Changju
Originally Posted by susehoush
hello,
we have a 3node ncs with sles10sp3 + oes2sp3 (64bit).
all servers are virtualized (vmware).
We had to remove the servers from the vranger backup, because the creation of snapshots for the backups regularly kills our non-master nodes. They are then on 100% cpu load and not responsive. The time we received cluster notifications about failed nodes was exactly the time that vmware was creating snapshort for the automatic backups.
Removing the vms from backups solved the problem.
Now my questions is:
Is it a good idea to increase the tolerance for heartbeat & watchdogs to perhaps something like 16 or 32 seconds?
Has someone any experience on this subject?
thx,
hugo

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Based on my knowledge , "hyper-v replica broker " is needed for failover cluster replica .
Here is a link for "Why is the "Hyper-V Replica Broker" required?"
http://blogs.technet.com/b/virtualization/archive/2012/03/27/why-is-the-quot-hyper-v-replica-broker-quot-required.aspx
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Best Regards
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Support for virtual IP in WKA list

I am attempting to implement Coherence Grid Edition 3.5.3 Patch 7 . It's running on Sun Java 1.6.06 on a Solaris 5.10 machine (which I will call machine A1) which has an ip address 1.2.3.261. Also, there is a virtual IP address 1.2.3.260 which points to this same machine A1, as well as a hostname that maps to the virtual IP address of the machine A1.
(Note: I have mocked up the IP addresses in this post for security reasons).
I am using WKA due to concerns of the local network admins regarding multicast (debatable, but for now let's please assume I need to go with WKA).
If this production machine A1 develops any problem, we can quickly switch to an alternate machine A2. The alternate machine A2 contains automatically replicated copies of all of our important sub-directories (including the coherence xml configuration files), but it does have a different IP.
During a failure of machine A1, we would shut down machine A1, start up machine A2, and reroute the virtual IP to alternate machine A2's true IP. Machine A2 would be supplied a copy of the file-system that A1 had when A1 was shutdown.
We would seek to not have to edit any configuration files on A2. It is difficult to maintain alternate configuration files using our current replication scheme, and any machine-specific customizations are problematic.
Therefore, we would prefer to list the virtual IP of machines A1 and A2 in the WKA list, rather than the true IP of these machines.
However, when I attempt to list the virtual IP in the WKA list...
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                    <socket-address id="1">
                    <address>1.2.3.260</address> 
                    <port>8088</port>
                    </socket-address>
               </well-known-addresses>
... I get the error below.
2010-09-03 12:01:51.464/1.401 Oracle Coherence GE 3.5.3/465p7 <D5> (thread=Cluster, member=n/a): Service Cluster joined the cluster with senior service member n/a
2010-09-03 12:01:54.760/4.697 Oracle Coherence GE 3.5.3/465p7 <Error> (thread=Cluster, member=n/a): Node myhostname/1.2.3.261:8088 is not allowed to create a new cluster; WKA list: [1.2.3.260:8088]
2010-09-03 12:01:54.760/4.697 Oracle Coherence GE 3.5.3/465p7 <D5> (thread=Cluster, member=n/a): Service Cluster left the cluster
Exception in thread "main" java.lang.RuntimeException: Failed to start Service "Cluster" (ServiceState=SERVICE_STOPPED, STATE_ANNOUNCE)
at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.start(Service.CDB:38)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.start(Grid.CDB:38)
at com.tangosol.coherence.component.net.Cluster.onStart(Cluster.CDB:395)
at com.tangosol.coherence.component.net.Cluster.start(Cluster.CDB:11)
at com.tangosol.coherence.component.util.SafeCluster.startCluster(SafeCluster.CDB:3)
at com.tangosol.coherence.component.util.SafeCluster.restartCluster(SafeCluster.CDB:7)
at com.tangosol.coherence.component.util.SafeCluster.ensureRunningCluster(SafeCluster.CDB:27)
at com.tangosol.coherence.component.util.SafeCluster.start(SafeCluster.CDB:2)
at com.tangosol.net.CacheFactory.ensureCluster(CacheFactory.java:998)
at com.tangosol.net.DefaultConfigurableCacheFactory.ensureService(DefaultConfigurableCacheFactory.java:905)
at com.tangosol.net.DefaultCacheServer.start(DefaultCacheServer.java:139)
at com.tangosol.net.DefaultCacheServer.main(DefaultCacheServer.java:60)
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at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.start(Service.CDB:38)
at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.start(Grid.CDB:38)
at com.tangosol.coherence.component.net.Cluster.onStart(Cluster.CDB:395)
at com.tangosol.coherence.component.net.Cluster.start(Cluster.CDB:11)
What exactly is being checked here? Does each Coherence instance expect to see it's own IP listed in the WKA list, and refuse to run if it can't find it's own IP on the list?
Is the instance detecting it's own IP via an operating system call, or is there some way I can influence the instance's sense of what IP it is running on?
Is there any advice for supporting this kind of virtual IP scenario?
I have tried listing the hostname with no better success, because the hostname points to the virtual IP, and therefore has the same effect as listing the virtual IP.
As a workaround, I have altered the WKA list to list of the true IPs of both machines...
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                    <socket-address id="1">
                    <address>1.2.3.261</address> 
                    <port>8088</port>
                    </socket-address>
                    <socket-address id="2">
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... even though both machines will never be up and running at the same time. This workaround avoids the error and the cluster appears to come up. I am not sure if there's any ill effect that at any given time one of these two IPs will never be up and running.
Despite my workaround, true support for virtual IPs would be superior; listing all the true non-virtual IPs in the WKA list means re-editing the list as the hardware changes.
Thanks for any advice!
P.S. I tried the above with Coherence 3.5.2 with the same results.
Edited by: user11114413 on Sep 3, 2010 11:45 AM

Hi user11114413,
The issue you are seeing actually has little to do with VIP, and more to do with there being multiple IP addresses for us to choose from on your box. For such multi-IP boxes, you'll want to tell us the IP to use, and in your case you want to tell as a VIP. This can be done either by editing your operational configuration file, and including an <address> element within the <unicast-listener> element, or via the tangosol.coherence.localhost system property. For example:
<unicast-listener>
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</unicast-listener>or
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As for using VIP or an extended WKA list, the choice is yours, either will work. If you do go the VIP route, it would obviously be a very bad idea to simultaneously use the same VIP and port at the same time from the two machines.
thanks,
Mark
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Setting O2CB cluster timeouts : OK
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Device Stack Cluster F Nodes
/dev/sdb o2cb d8aed2bb8ab9381d G Unknown: Bad magic number in inode
/dev/sdc o2cb d8aed2bb8ab9381d G u139gw
/dev/sdd o2cb d8aed2bb8ab9381d G Unknown: Bad magic number in inode
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/dev/sdg o2cb d8aed2bb8ab9381d G u139gw
/dev/mapper/360060e8006d044000000d0440000012b o2cb d8aed2bb8ab9381d G Unknown: Bad magic number in inode
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/dev/mapper/360060e8016503600000150360000000d o2cb d8aed2bb8ab9381d G u139gw
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Magnus wrote:
The heartbeat regions is on /dev/mapper/360060e8006d044000000d0440000012b, And as you can see it has "Bad magic number in inode",
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Sorry for the long winded post, but I wanted to give as much detail given this error has been raised before and snapshots are usually blamed as the cause.
My question is this:
If the ESX host had plenty of available disk capacity and there were no snapshots enabled on the VM (or any other VM's on the same host), then why did our Virtual machine crash with the error that 'there is not more space for virtual disk Servername_2.vmdk'?
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I would greatly appreciate any advice or suggestions.
If I have not provided enough info on the specs or environment, please let me know and I will provide more information.
Thanks all,
Kurt

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iSCSI as you are using with a NAS such as Synology or QNAP. NAS Selector - Support - Synology - Network Attached Storage (NAS)
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D

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Hello,
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l_s_range-low3(2) = ZFIDAY4(2).
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LOOP AT lo_node_children INTO wa_lo_node_children.
    lo_nd_child = wa_lo_node_children-node.
    me->expand_node_rec( node = lo_nd_child ).
ENDLOOP.
ENDMETHOD.
However I'm getting the error above: "Lead selection not set for context node".
Any suggestions?
Edited by: DEVELOPMENT THEMIS on Jul 7, 2011 6:34 PM

hi developement Themis,
I think u didn't diclare "node" as context node. So declare it as a context node before using as a context node..as below
DATA node TYPE REF TO if_wd_context_node.
or u can use "lo_nd_child " as ur context node in ur program in place of "node"
then I think this error will be removed.
thanks,
simadri

Using animation as icon for JTree node

Hi,
I am using a custom tree cell renderer. I have a label in the renderer, the label have gif Image Icon, but the problem is it is not getting animated. But when I use a JLabel with gif icon some where else it is working fine, but it is not working for tree node.
package com.gopi.utilities.gui;
import java.awt.Color;
import java.awt.Component;
import java.awt.GridBagConstraints;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellRenderer;
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JLabels using ImageIcons are designed to display the icon as is, including animation and all.
A CellRenderer only paints the Icon once, when the cell is painted. Much ike a rubber stamp of the JComponent. Hence, its not designed to do the animation and all.
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