Fault tolerance shared files
hi all.i am confused about fault tolerance. i am wondering if you can answer my questions point by point if i enable fault tolerance for A VM i will have a secondary VM in another host.my questions...
View ArticleUsing HA with blade servers
If I'm using Blade servers, how should I design placement of HA cluster nodes across different chassis to allow for the failure of the chassis itself?
View ArticleHA didnt work only for 2 VM's
Hi, we had 20 VM's on a host which was working fine, due to hardware issue host got hung , VM's moved to other host. Only two VM's didnt move we had to manually move those VM's to other hosts. When we...
View ArticleThe vSphere HA availability of this host has changed to Unreachable
We recently deployed a new vSphere 5.0 U1 HA-enabled cluster. I noticed that a couple of times on an otherwise healthy cluster, after taking a host out of maintenance mode, the last HA event for the...
View ArticleHA Agent fails on multiple hosts when putting one host in maintenance mode
I have a 13-host HA/DRS cluster, all hosts running ESXi 4.1. I put one host in maintenance mode this afternoon, and once it migrated all the VM's, disabled its HA agent, and entered maintenance mode,...
View ArticleExample Architectural Decision - HA admission control setting & Policy...
Hi All I have started an Architectural decisions register on my blog "CloudXC". The below is the first in the register, focusing on HA admission control....
View ArticlePotential VMWare 5.1 Fault Tolerance bug/issue?
Hi, all.Background / SetupI've got a fresh install of vCenter Server 5.1 and associated components.I've taken all steps (as far as I can tell) to enable FT, and it worked the first time (yanked a power...
View ArticleCloudXC Example Architectural Decision Register - Virtual Machine Swap File...
Hi All Today's example architectural decision covers Virtual machine swap file locations. http://joshodgers.com/2012/12/11/example-architectural-decision-virtual-machine-swap-file-location/ Hope you...
View ArticleCloudXC Example Architectural Decision Register - HA Isolation Response for...
CloudXC Example Architectural Decision Register Update - HA Host Isolation response for IP Storage http://t.co/3c1QYmx5...
View Article1 vCPU for FT - does that include cores?
We have an application that runs our business about 16 hrs a day that utilizes MS SQL Server 2005 running on Windows Server 2003 (16-bit) SP2. I am not able to upgrade to newer software. The existing...
View ArticleHA restarts powered off machines?
Hi, We have a test cluster of three hosts (one host with ESX 4.1 U1, two hosts with ESXi 5.0 U1) and a vCenter 5.0 U1. HA and DRS is enabled. This past sunday, in preparation for scheduled network...
View ArticleAdmission Control - [Sanity Check] Unbalanced cluster w/ no VM reservations
I've been spending time reviewing Adminission Control policy and just looking for a "sanity check" that my calculations and findings in my environment are accurate. Currently managing an unbalanced...
View ArticleAMD 62xx and VMware FT
Are the AMD 62xx processors not compatible with VMware Fault Tolerance? Is the case for ESX 4.x and 5.x?
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Understanding an HA installation
I am new to the VMware HA configuration and just wanted to be sure I have my thoughts in order. We are looking to do a configuration as shown below: For my test bed, I have 5 ESXi servers, there will...
View ArticleGuest and HA Application Monitoring SDK 9.0 for vSphere 5.1 for Solaris
Hi guys, I have tried SDK for Linux and Windows and i find it very useful. I have some Solaris VMs in my environment and I would like to monitor applications running on these VMs too. I could not find...
View ArticlevCenter Disconnects from Master HA Agent
After a recent vCenter migration we are seeing the following events in our cluster taks & events: vCenter Server is connected to a master HA agent running on host ...vCenter Server is disconnected...
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HA Fail in ESXi5
Hi I Configure HA in clusterall of thin is correct VMotion VM between Hosts is working Correctlybut for Example Drag Out Connection Network Cable in one of Host for Test HAthe VM not Restart in other...
View ArticleHA and Alarm Host connection failure
This is driving me mad.. I am getting the "Alarm Host connection failure" false alerts whenevr HA is enabled. I have tried unchecking\rechecking, restarting hosts, removing\readding to vCenter and...
View ArticleMigration Issue
We have a cluster with 6 ESX hosts.(3.5).with one resource pool having resources 16525mhz and 132213MB.no reservations and shares normal.and around 10 vms are outside the resource pool.ESX host...
View ArticleExhausting inodes + Disconnected Host
Hi All, I just had an interesting issue, and though I would share this as it might save you co-ordinating some planned downtime which could potentially be avoided. We had a disconnected host where the...
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