VMware DRS and VMware HA

Similar Questions

• DRS and live Migration with the guest operating system issues

  Hello

  Someone at - he never encountered problems with the DRS or dynamic migration where the OS in question invited crashes under the peaks of the processor. This seems to be with servers but not specific to 64-bit or 32-bit servers it sure substance of concern with machinery that uses a lot of CPU or memory crash when migrating on the fly. We have 7 of Quad-Core AMD BL465 with esx3.5 update1 DRS and HA active and animators have many resources to offer.

  Thank you very much

  Rich

  You experience the problem that is described in this KB?

  http://KB.VMware.com/kb/1003638

  If you believe this or any other answer was helpful please consider marking as 'correct' or 'useful '.

• Change the PowerCLI Script to use the DRS and DRS storage

  Hello

  I have a PowerCLI script that specifies a host and a data store to create a new virtual machine, which has served us well. Now we have activated the DRS and DRS storage and I wonder what to change in order to take advantage of these features. Are there commands to specify a cluster and the cluster data store and let the DRS to decide the initial investment for a new virtual machine? At the moment we put all hosts and the warehouses of data as variables and use them in the line below.

  Thank you.

  $newVM = New-VM-name $NewVMname - VM $TemplateName Datastore - $datastore - VMHost $vHost - confirm: $false - location $myName

  You set a Datastorecluster?

  If Yes, then you can replace the value of parameter data with the datastorecluster object store.

  Replacing a VMHost with a cluster is not taken in charge I'm afraid.

  But you can use something like this

  New-VM-name TestVM Datastore - DSC - ResourcePool (Get-Cluster-name mycluster |) Get - Resourcepool - name of resources)

  This will automatically select the VMHost.

  The virtual machine appears in the root of the cluster.

  DSC is the name of a datastorecluster in the cluster mycluster

• DRS and Resource Allocation

  Hi all

  When to use the DRS and what should resource allocation. Because I have the impression that this has 2 contradicted each other. DRS allows VMs to use resources of other physical hosts right? And allocation of resources defines how a group must use the right?

  Welcome to the forums - they are not at all contradictory - don't forget the DRS is desigined to ensure that virtual machines get CPU/memory resources they need. It does this by monitoring the consumption of resources on each host in the cluster and what host can provide these resources. Since a virtual machine can use resources form one host at a time, if another host has several DRS resources will be vmotion as VM to TI.

  Now, if you define resource assignments to the DRS VM will use these to determine what host will be better satisfy these constraints and requirements - and when the value of resources at a pool level that the elimination of cluster resources - you are really used to divide the resources in a DRS cluster to different groups - the best example this splitting resources between development/test and production so that the Test/Dev do not monopolize depriving them of resources production of virtual machines.

  If you find this or any other answer useful please consider awarding points marking the answer correct or useful

• Configuration of the DRS and CVS!

  Hi all

  I have 2 IBM (M4 Systemx3650 IBM, Intel® Xeon® CPU E5 - 2620 V2 2.10 GHz, 12 processors * 2,099 GHz) hosts.

  one DELL number (PowerEdgeR730, Intel® Xeon® CPU E5 - 2630 V3 @ 2.40 GHz, 16 processors * 2,399 GHz) host with much more kit license vmWARE. configured in a single cluster and all ARMY 3 are under the same group.

  Problem 1: attempt to activation of DRS, get error because I'm not allowed to activate DRS for license and DELL host must be updated to the same.

  "Problem 2: attempt to activate CVSIntel® Ivy Bridge ' generation is not tenable for host DELL and Intel®"Haswell"generation is not tenable to accumulated both IBM hosts.

  If someone could suggest an easy way to overcome it / what step should I take to solve it.

  So now the problem is simple, since you do not have a problem of compatibility really :-) Since vCenter VM is started in one of the hosts, you must perform this procedure: VMware KB: VCA allowing on a cluster when vCenter Server is running in a virtual machine

  The VCA level for the new cluster must be Ivy Bridge.

• DRS and HA

  Could someone explain in clear terms and details of what is happening on the background of the HA and DRS.

  Thank you

  Basically, these two requires shared resources on the storage like iSCSI, NFS & FC and have also meet requirements on the cluster before you can activate the.  High availability is used to interruptions not planned, such as the systems has crashed or power problem.  It will automatically restart your virtual guests at an eve of hosts within the cluster and the rule of priorities and the reboot process can be adjusted according to your preference.  There are 5 primary coordinators and secondary standby Coordinator within the PA, and allows a maximum of 4 hosts failed in a cluster, the 5th main Coordinator to perform work.  Distributed Resource Scheduler is essentially a mechanism of load balancer within the ESX groups where all CPU and RAM are distributed evenly, and you can assign to be conservative or aggressive or automatically with the level of recommendations.  These features can be managed using vCenter server.

  If you found this information useful, please consider awarding points to 'Correct' or 'useful '. Thank you!!!

  Kind regards

  Stefan Nguyen

  VMware vExpert 2009

  iGeek Systems Inc.

  VMware, Citrix, Microsoft Consultant

• Should we the DRS and VMotion for tolerance fault? Small cluster host 3

  Hello

  I'm slightly confused on some information coming from two different directions. We are in the stages of buying a package of Vsphere Essentials Plus and intend to build a 3 host with shared storage cluster. VSphere essentials plus the package comes with HA which, from my understanding, fail over automatically and restart the virtual machine on the available server. In case of server failure Vmotion or DRS provides something more than HA.

  We are told that VMOTION & DRS moves virtual machine of FAILURE to an available server without restarting the virtual machine. I don't know how that's possible, but I wanted to check first with the community.

  VSPHERE 4 ESSENTIALS PLUS seems ideal for small host deployments 3 @ $2 600 however, that same lic. for the regular VSPHERE enterprise is $2 800 per CPU that @ 6CPUS is more than $17 K.  Then why should we spend $17 K for business verus a $2 600 essentials more lic for such a small deployment?

  Thank you

  CA

  Yes, this is a new feature. http://www.VMware.com/products/fault-tolerance/

  It may work on the existing links, but it is recommended to have dedicated interface for FT.

  ---

  VMware vExpert 2009

  http://blog.vadmin.ru

• New groups of DRS and rules, would avoid vMotion Storm

  DRS groups and rules below look good to present our cluster that has never had one?

  Our current cluster of business (20 hosts running ESXi 5.5U2) does not have rules of DRS in place.  I'd like to introduce five new nodes in this cluster, but I don't want (fully automated) DRS to move our critical production VMs to these five nodes until they are sufficiently burned in.  We want only our critical VMs not filing migrate to these new nodes for the moment.

  DRS Group Manager

  1. Create two 'DRS Host groups':
     1. the VM guests
     2. new guest VM
  2. Create two 'DRS VM groups':
     1. production critical VMs
     2. VMs critics off-production

  Here are the screenshots of the DRS rules that I've not enabled yet.  DRS will attempt to overhaul all of the critical production VMs (1000 VMs) on these existing hosts or will he see that they already exist on these hosts and left alone?  It will be graciously vMotion 100 critical VMs off-production for the new guests I bring in this cluster?  I would like to avoid creating chaos by making the production of 1000 reviews VMs dragging around the existing VM guests.

  

  With these two rules configured as 'must' of the rules, and all virtual machines running on the 'existing VM hosts', I expect that DRS will start the migration of the 'non-production critical VMs' as soon as rules are enabled. What do I usually when DRS rules configuration is to temporarily put the DRS on "Manual", set / add the rules and then go to the DRS tab see small jets DRS recommend after pressing the button "execute DRS. If the recommendations of the DRS me correspond to the expectations, I then the DRS automatic value again and let her work with DRS.

  André

• Groups of DRS and HA

  Hi guys,.

  I need to refresh my mind.

  I need to create rules of the DRS to keep the virtual machines running on a specific hosts bunch, and that's fine.

  What about the HA? the DRS procedure rules will be kept in the case of a virtual machine will reboot due to HA?

  I remember that reboot because HA DRS rules are always checked before placing a virtual computer on a specific host, but I need to have this confirmed.

  Many thanks in advance,

  Daniele

  Hi Daniele,

  I wrote a few articles on this topic, you can check:

  http://frankdenneman.nl/2012/02/SDRS-anti-affinity-rule-types-and-HA-interoperability/

  http://frankdenneman.nl/2010/12/VM-host-affinity-rules-should-or-must/

  In short, HA is aware of the required rules, (designated with Must (not) run away). HA does not know if the rules.

  And after the failover, the first time DRS HA is called (within 5 minutes) DRS violation of rules will correct them before the imbalance of the renderfarm.

  Kind regards

  Frank

• DRS and HA Capacity-Planning

  We have a cluster DRS/HA of the four armies and so far it plays well for us.   Control Panel says we could potentially lose up to two guests and retain all the customers who live on them.  I have HA settings to not allow constraint violations.  Does this mean that I can continue to add hosts, and the VI software to prevent me to add too, such that we could lose a host is no longer and keep the guests?

  I'm curious to know how I can load on the cluster before you start seeing performance issues and still be able to tolerate the complete loss of a single host.

  I think what you mean by "adding more hosts" creating virtual computers, not you? If so, you can continue to create without any problem, in time that the HA cluster it can't handle more it will give advice you, given that you have configured the cluster to not allow any violation of constraint. This occurs when you try to turn on a virtual computer that will violate any constraints (cpu, memory). HA always respect all the resource pools, configuration of resources to virtual machines and amount of memory for each virtual computer.

  Now, you should not be confused with computing power, since 1 VM that are really time CPU can eat as much as an ESX can give. I mean, both of ESX failure, you will notice a small reduced CPU power, since you will have multiple VMs per host until you retrieve the lost ESX.

  Hope this can help you.

• DRS and automatic startup & Shutdown each other?

  I have a client with 4 3.5, using HA & DRS ESX host.  We want to configure Autostart VM & stop with the hosts, the potential problems of power are made with elegance.  And more of the virtual computers must be started in a specific order.  How can we achieve this?  It looks like if specify us the order started on the individual hosts, and then a virtual computer is moved to another host by the DRS, the boot order is blown.

  Hello

  This option works only for guests 'stand alone '. So it does not work in a Cluster.

  Lars Liljeroth

  -

• HA/DRS and a Cluster of 10 ESX host

  Hello

  I would appreciate comments on best practices for HA and DRS configuration on the following configuration:

  • We have a cluster of 10 ESX host

  • 2 guests are related ONLY to datastore1

  • 8 guests are related ONLY to datastore2

  • All hosts are available and active in Lab Manager 3.02

  • We use no fences of network

  The questions are:

  1. If one of the hosts in the 'group' of 8 guests above fails, HA will restart the virtual machines on the 7 remaining or it will try to start on one of the 2 hosts in the different 'group' (which have no connectivity to datastore2). Please note that I use the term "group" to highlight the hosts connected to separate data warehouses.

  2. can we or must activate us DRS about this group in a perspective of Lab Manager? Even if we have a maximum of 8 hosts connected on the same VMFS volume, are we exceeding any rule DRS here?

  Thank you

  gogogo5

  My best guess is that most should all magically work.

  DRS won't even try to break you, he will always recommend you only migrants who are indeed possible.

  Yes, normally I too would advocate this split into two different groups, but with the problem, they do not need to be joined (you have configurations for which a VM MUST go on 2 and the rest MUST go to the 8, and indeed, LM will refuse to cross pools of resources to achieve).

  If disable you completely the DRS, LabManager uses a variant of the old (pre - 3.0) algorithms to try to find the compatible host less loaded (at deploy time) and put it there.

  I'm too uncertain and curious about the HA situation. I have a feeling would be deeply confused on a default installation, it could be implemented, but it would be difficult to make the right constraints.

• DRS and CPU % ready

  What VC & DRS seem to make decisions to migrate virtual machines with respect to the use of the processor?  Is it only in overall CPU utilization on ESX hosts in the cluster or is he looking at other factors such as the ready values % of CPU on the host computers?  For example, that you have a 16 core host and several 4 virtual computers vCPU that perform poorly and have very high CPU % ready times, but the overall use of the CPU on the host computer is low, DRS trying to rebalance these virtual machines?  Thank you.

  I made this request even in queries.  Now its only looking at the CPU usage and does not know about the other factors regarding the use of the CPU.

  I had some older hosts that while the CPU was used only to values of RDY % medium, about 30% were constantly 5-15 then it became unacceptable and once DRS passed everything was when one or more of the virtual machine started going to 100% on my old plug cores doubles one.  New hardware that resolved completely so (more than hearts) for me so it's not a problem anymore for me.

• VMotion, HA, DRS and VCB

  Hello all - I've been this vCenter 4 can manage esx3.5 and esx4 under the same farm.  question - vmotion, Ha, DRS, VCB funtional yet betwenn two different version of the ESX host?

  Thank you

  You are welcome

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• Exclude the participant to the DRS and HA VM

  Hello

  I am running a cluster 7 nodes with ESX 3.5 and Virtual Center 2.5, the HA and DRS (automated) are activated.

  Is it possible to configure a specific VM to not participate in the DRS or HA migration?

  Thank you

  Steve

  Hey,.

  If you change the settings for the cluster, you will be able to define the attributes of the HYALURONIC ACID DRS by VM.

  If you have found this device or any other answer useful please consider useful or correct buttons using attribute points

  ~ y