Best practices ESXI 4 DRS

DRS allows guests to get to very high processor use before moving the virtual machines. The question is, customer MANAGER has read only access to vcenter. He sees that some ESX hosts are constantly, getting CPU usage up to 98% with a warning on the host. He wondered about this.

I'm not aware of the harmful effects on the production environment, but it's a bit noticeable when displaying the cluster on the hosts tab. Sometimes four of the sixteen hosts have a caveat during production hours. The attached picture shows a typical morning, with some hosts to 98% and 50%.

The cluster has a capacity of 11 guests on the 16 failover, but we have very busy periods.

Is there anything that can be done to configure things differently from the DRS? We could use Affinity rules to keep busy VMs on different hosts?

Among the DRS Best practice:

(1) in deciding which hosts in a DRS cluster, try to choose hosts that are as homogeneous as possible in the processor and memory. This ensures the stability and predictability of performance higher. VMotion is not supported on hosts with incompatible processors. So with heterogeneous systems that have incompatible processors, DRS is limited in the number of opportunities to improve the balance of the load on the cluster.

(2) where multiple ESX hosts in a DRS cluster are compatible VMotion, DRS has more choices to better balance the load on the cluster

(3) do not specify affinity rules unless you have a specific need to do so. In some cases, however, specifying the rules of affinity can improve performance

(4) allocate resources to virtual machines and pools of resources with care. Be aware of the impact of the limits, reserves and overload of virtual machine memory

(5) virtual machines with smaller sizes of memory or CPU virtual less offer more possibilities for DRS to migrate them to improve the balance on the cluster. Virtual machines with larger memory or virtual CPU add more constraints in the migration of virtual machines. Therefore, you must configure only as many virtual processors and memory for a virtual machine as needed.

Tags: VMware

Similar Questions

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    If it is strictly intended to DR, I suppose that high performance is not what you need in the first place.

    Then I'd go to a server with 1 CPU Quad Core 2.5 GHz or more, at least 8 GB RAM 2x300GB SAS HDD as RAID1, make sure you have a RAID with battery buffered controller cache write (otherwise you won't be very happy). Make sure that the server and the components are the VMware HCL

    The servers will run probably with 2 GB of RAM, but ESXi will have too little RAM.

    Configure the virtual machine as you would with physical HW.

    For Windows 2003, you can partition alignment.

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    EDIT: Please use only 1 vCPU per VM.

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    See the technical white paper for a bit more on this topic below.

    https://www.VMware.com/PDF/Perf_Best_Practices_vSphere5.5.PDF

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    Obrigado

    Olá amigo, good afternoon.

    Leave aqui um trecho do livro "Virtualização - Central Datacenter do Componente" em than comenta, sober os conceitos uma rede virtual cloud:

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    - Blog of experience front of VMware

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    traffic will pass by vmkernel and distributed. environment like yours, that separates the vmkernel makes no difference because there isn't any iscsi or vmotion traffic.

  • ESXi 3.5 U5 - best practices for the collection of NETWORK adapters

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    mdsuser wrote:

    I want team two network adapters to the default value 0 of the Virtual Switch.

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  • How to disable snapshots for domain controllers in ESXi 5? Or other best practices?

    Dear all,

    I need some aspects of assistance to the deactivation of snapshots for 2 VMS in my HA cluster running Active Directory to Windows 2008 R2.

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    leschua75 wrote:

    .

    I'm worried about auto created by the systems periodically snapshots and the problem arises if a snapshot is to be reinstated by mistake.

    VMware has no system automatically taking portraits.

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  • What is the best practice for the double management interfaces?

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    The NIC vSwitch0 value active/active, the vswif (and future vmkernel management) team of NIC Active vmnic6 and vmnic1 ensures and leaves the vMotion vmkernel NIC team as is.

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    VMK (vMotion): active standby, vmnic6 vmnic1.

  • Dell MD3620i connect to vmware - best practices

    Hello community,

    I bought a Dell MD3620i with 2 x ports Ethernet 10Gbase-T on each controller (2 x controllers).
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    As I have never worked with stores of DELL, I need your help in answering my questions:

    1. What is the best practices to connect to vmware at the Dell MD3620i hosts?
    2. What is the process to create a LUN?
    3. can I create more LUNS on a single disk group? or is the best practice to create a LUN on a group?
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    Tahnks in advanse!

    Basics of TCP/IP: a computer cannot connect to 2 different networks (isolated) (e.g. 2 directly attached the cables between the server and an iSCSI port SAN) who share the same subnet.

    The corruption of data is very likely if you share the same vlan for iSCSI, however, performance and overall reliability would be affected.

    With a MD3620i, here are some configuration scenarios using the factory default subnets (and for DAS configurations I have added 4 additional subnets):

    Single switch (not recommended because the switch becomes your single point of failure):

    Controller 0:

    iSCSI port 0: 192.168.130.101

    iSCSI port 1: 192.168.131.101

    iSCSI port 2: 192.168.132.101

    iSCSI port 4: 192.168.133.101

    Controller 1:

    iSCSI port 0: 192.168.130.102

    iSCSI port 1: 192.168.131.102

    iSCSI port 2: 192.168.132.102

    iSCSI port 4: 192.168.133.102

    Server 1:

    iSCSI NIC 0: 192.168.130.110

    iSCSI NIC 1: 192.168.131.110

    iSCSI NIC 2: 192.168.132.110

    iSCSI NIC 3: 192.168.133.110

    Server 2:

    All ports plug 1 switch (obviously).

    If you only want to use the 2 NICs for iSCSI, have new server 1 Server subnet 130 and 131 and the use of the server 2 132 and 133, 3 then uses 130 and 131. This distributes the load of the e/s between the ports of iSCSI on the SAN.

    Two switches (a VLAN for all iSCSI ports on this switch if):

    NOTE: Do NOT link switches together. This avoids problems that occur on a switch does not affect the other switch.

    Controller 0:

    iSCSI port 0: 192.168.130.101-> for switch 1

    iSCSI port 1: 192.168.131.101-> to switch 2

    iSCSI port 2: 192.168.132.101-> for switch 1

    iSCSI port 4: 192.168.133.101-> to switch 2

    Controller 1:

    iSCSI port 0: 192.168.130.102-> for switch 1

    iSCSI port 1: 192.168.131.102-> to switch 2

    iSCSI port 2: 192.168.132.102-> for switch 1

    iSCSI port 4: 192.168.133.102-> to switch 2

    Server 1:

    iSCSI NIC 0: 192.168.130.110-> for switch 1

    iSCSI NIC 1: 192.168.131.110-> to switch 2

    iSCSI NIC 2: 192.168.132.110-> for switch 1

    iSCSI NIC 3: 192.168.133.110-> to switch 2

    Server 2:

    Same note on the use of only 2 cards per server for iSCSI. In this configuration each server will always use two switches so that a failure of the switch should not take down your server iSCSI connectivity.

    Quad switches (or 2 VLAN on each of the 2 switches above):

    iSCSI port 0: 192.168.130.101-> for switch 1

    iSCSI port 1: 192.168.131.101-> to switch 2

    iSCSI port 2: 192.168.132.101-> switch 3

    iSCSI port 4: 192.168.133.101-> at 4 switch

    Controller 1:

    iSCSI port 0: 192.168.130.102-> for switch 1

    iSCSI port 1: 192.168.131.102-> to switch 2

    iSCSI port 2: 192.168.132.102-> switch 3

    iSCSI port 4: 192.168.133.102-> at 4 switch

    Server 1:

    iSCSI NIC 0: 192.168.130.110-> for switch 1

    iSCSI NIC 1: 192.168.131.110-> to switch 2

    iSCSI NIC 2: 192.168.132.110-> switch 3

    iSCSI NIC 3: 192.168.133.110-> at 4 switch

    Server 2:

    In this case using 2 NICs per server is the first server uses the first 2 switches and the second server uses the second series of switches.

    Join directly:

    iSCSI port 0: 192.168.130.101-> server iSCSI NIC 1 (on an example of 192.168.130.110 IP)

    iSCSI port 1: 192.168.131.101-> server iSCSI NIC 2 (on an example of 192.168.131.110 IP)

    iSCSI port 2: 192.168.132.101-> server iSCSI NIC 3 (on an example of 192.168.132.110 IP)

    iSCSI port 4: 192.168.133.101-> server iSCSI NIC 4 (on an example of 192.168.133.110 IP)

    Controller 1:

    iSCSI port 0: 192.168.134.102-> server iSCSI NIC 5 (on an example of 192.168.134.110 IP)

    iSCSI port 1: 192.168.135.102-> server iSCSI NIC 6 (on an example of 192.168.135.110 IP)

    iSCSI port 2: 192.168.136.102-> server iSCSI NIC 7 (on an example of 192.168.136.110 IP)

    iSCSI port 4: 192.168.137.102-> server iSCSI NIC 8 (on an example of 192.168.137.110 IP)

    I left just 4 subnets controller 1 on the '102' IPs for more easy changing future.

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