Sync Duration in vCenter Linked Mode
After How much time vCenter Roles and other things are synchronized in between vCenter Servers in Linked Mode?
View ArticleClusters Sharing Datastores
Hi all,Are there any performance or other impacts of sharing datastores between 2 HA clusters within the same vcenter (all vsphere5)?For example if you separated the hosts into separate clusters due to...
View ArticleHA Failover Capacity Levels!
Hi All,Please review my cluster status,VMware vSphere Version=5.0No.of Nodes in the cluster=4Each Node configuration=24GB RAM, 12*2.40GHz CPUTotal Cluster Memory=95.96GBTotal Cluster CPU=115...
View ArticleHA with Fault Tolerance Design
Can someone post their network design with hardware and software along with how they have vmware HA with FT implemented? I'm looking to consolidate our servers and want to also implement ha and ft...
View ArticleEVC with different core CPUs?
Hi All,My Cluster have four ESXi hosts with CPU model=Intel(R) Xeon(R) CPU E5645 @ 2.40GHz-6 Cores. I need to add our existing standalone HP DL380G6 servers into the same cluster. CPU model for the HP...
View ArticleFT and multiple CPUs
I saw an article in 2009 regarding FT that can't support more than CPU, see the following link:...
View ArticleFT CPU Limitation
Hi There, I'm new to VMware so here's a silly question. As I understand it there is a limitation of 1 on the number of vCPUs a VM can have when using FT. Firstly, is this limitation only for FT or is...
View ArticlePrimary VM freezes during FT
I've a FT setup and my primary VM freezes every now and then. The freezing time is from 20 seconds to more than a minute. I've pin-pointed the problem and it seems than whenever the secondary ESX...
View ArticleVM's restarted by HA
Hello, We have a cluster of 4 ESXi 4.1 (U2) host.We witnessed a incident where all VM's were powered off and then were restarted by HA on two of the hosts at almost the same time, However both the ESXi...
View ArticleHow to ensure enough resources for site redundancy?
Just wondering how to make sure there's enough resources between 2 sites to cover a site failure. With 2 active/active sites with their own 5.0 vCenters, there's SAN replication between the 2 sites for...
View Articlefault tolerance not working
On one server "host already has the recommended 4 ft vms running on it...disable restriction in HA advanced options". On the other server "virtual machines in the same fault tolerance pair cannot be on...
View Articlevmware tools heartbeat failure: guest reset but should it have?
I have a linux guest vm that was reset early 1 morning because of the above HA message after coming out of a VDP backup snapshot but I was wondering if it should have been and what if anything I should...
View ArticleHost Isolation Response setting for FC SAN Storage
Hi guys We've been trying to determine a "silver bullet" for our HA clusters when it comes to high availability. We've encountered several different types of scenarios such as core network switches...
View Articlehost shutdown when datastore inactive
Hi i have 2 virtual cisco apps on 2 seperate servers that are HBA connected to a vnx datastore - when i lose the connections to the datastore my LUN becomes inactive on the its corresponding host . Is...
View ArticlevSphere HA Agent Unreachable
I've got a few nodes in a small cluster that are throwing errors when I try to Reconfigure for HA. /var/log/fdm.log for one of the affected hosts has lots of: [29904B90 verbose 'Cluster'...
View ArticleNeed to make VMs move and Power On the Other ESXi , HA and Power...
Dears Need to make VMs move and Power On the Other ESXi using the HA and Power Options So what Options I need to Enable and Disable : Turn On Vsphere HAEnable Host MonitoringAdmission Control (...
View Articlecould not reach isolation address
So, I just upgraded my vCentre server to 5 and now all my 4.1 ESX servers are responding with: vSphere HA agent on this host could not reach isolation address: 192.168.0.1 Any idea why this message...
View ArticleMaximum number of hosts in an N+1 cluster
I am using HA on ESXi 5.1. To start with I have 4 hosts in each cluster. To begin with setting the admission control policy for "Host Failures the Cluster Tolerates" to 1 works perfectly. As I...
View ArticleHA Advanced Optiopns not active after vCenter restart
Hi, we're running our clusters with fixed slot-sizes, so we've specified these HA's Advanced Options: das.slotcpuinmhzdas.slotmeminmbdas.vmcpuminmhzdas.vmmemoryminmb These are working as long as the...
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