Fault tolerance/HA/cluster optimization question

Similar Questions

• Impossible to enable Fault Tolerance on a cluster of ESXi 4.1

  Can anyone offer any suggestions as to what I may have missed in the attempt of activation FT on our VM vcentre?

  The Setup is a cluster of 3 nodes Dell R610 (record identical machine) with an iSCSI SAN, licenses are Enterprise

  VCentre VM runs on this cluster and I would allow to FT.

  Cluster goes on Site 2.5.2 brilliantly, all green ticks and not a red cross. VCentre VM disk has been eager to zero cloned, CD/disks removed, only uses 1 vCPU

  When I try to activate FT I get an error "the VM runs in a monitor mode that is not compatible to the fault tolerance", which is breathtaking in its usefulness

  Any ideas where to go from here? Is there a more detailed log than that presented in the gui VI who can point me in the right direction?

  Stephen Dunne wrote:

  When I try to activate FT I get an error "the VM runs in a monitor mode that is not compatible to the fault tolerance", which is breathtaking in its usefulness

  See KB 1036775 for instructions on changing the mode of monitoring.  For the compatibility of fault tolerance, you want to 'use Intel VT-X/AMD-V for the instruction set virtualization and software for MMU virtualization.'

• 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

• Protect both virtual machines with features of ESXI fault tolerant clustered disk

  Hello world

  I read the following:

  VMware vSphere with operations management: fault tolerance | United States

  The line that interests me is:

  "VMware vSphere® fault tolerance (FT) ensures the continued availability of the applications in the event of server failure by creating an instance of live snapshots of a virtual machine that is always up to date with the first virtual machine. In the event of hardware failure, vSphere FT triggers automatically failover - ensure no interruption of service and prevent data loss. »

  Question:

  FT can protect both virtual machines that share disks in a cluster configuration? (A cluster SQL instance for example)

  FT can protect both virtual machines that share disks in a cluster configuration? (A cluster SQL instance for example)

  No, you can't, because there is an incompatibility with FT.

  Refer to the documentation for all requirements and interoperability: interoperability of fault tolerance

• Heartbeat vs Fault Tolerance

  In my environment, we have a single server vCenter Server (4.0) running in a virtual machine in a HA / DRS cluster.

  My question is: if my license level includes the fault tolerance, couldn't accomplish the same protection of my vCenter server using FT instead of heart rate? I realize that Heartbeat is more likely for installations with MORE than a vCenter, but given that I only have one, I'm I right in thinking this?

  Just think...

  Hello.

  There is a good discussion about the use of FT for vCenter here.

  Good luck!

• VSAN 6.2 'method of fault tolerance' is not available

  Hello

  I installed 4 6, 0u2 ESXi hosts, each equipped with 3 flash devices and a VCVA 6.0U2

  I built the VSAN cluster without activating dedup and compression.

  But when I try to build a raid5 storage strategy, I can't find the parameter of the method of fault tolerance to allow coding of erasure with RAID5,

  I found the after fault tolerance method parameter enabled dedup and compression.

  Is this good?

  It's surprising. I have 60U2 basic vsan cluster where I am able to see 'Method of fault tolerance' the two option of raid 0 and raid 5/6 without activation of compression and deduplication.

  Can you confirm that you have all the flash disk group when you tried this option

  You can logout/login to the webclient service and check if you are able to see (there is a known, documented problem where some of the policies will not be visible unless you disconnect/connect back to the user interface)

  Was it installed or upgraded charges. If you upgrade, you did the upgrade of the disk version. I think that features will not appear if the upgrades of the disc are not (and automatically activating dedup/compression is an upgrade of the disk)

• 6.0 Update 01 vSphere fault tolerance

  Hello everyone,

  I have a problem whene I activate Fault Tolerance on dv01.

  It is the configuration of my physics

  • 2 ESXi 06 update01 build 3073146
  • 1 cluster HA active
    • Ordered admission disabled
    • Disabled DRS
  • 1 with port configuration of vMotion group vDS
  • 1 starndar vSwitch for Fault Tolerance with 2 x Intel® Ethernet Converged Network Adapter X 520 - T2 10 Gbps
  • e

  Dv01 Config

  • 4 vCPU
  • 3 ramdisk stored a first shared data store datastore01 1.35 to:
    • Reset Eager 136 GB Thik provisioning
    • 500 GB Thik provisioning eager to zero
    • 600 GB Thik provisioning eager to zero
  • connected to the port vDS group 1 VMXNet3 network adapter
  • latest VMware tools installed
  • Guest OS Windows Server

  When activated the fault tolerance, I chose the ESXi02 and second datastore02 shared data store 1.28 at: the vmdk and vmx file is created successfully and I free 44Go on the datastore02 of a second.

  But whene I try to turn on this dv01 I have this error

  • vCenter car not power on the secondary VM
  • and whene I look on the event, the error is not "enough space for the secondary virtual machine."

  Can someone help me, please to fix this whene I enabled FT on litle VM02 with 1 thin vdisk, is working but for dv01 is not work

  THX in advance

  Best regards

  Hi DZinit,

  The computation of the space you need on the second data store, you take the file vswp into account. This will generate enough to on and be equal to the size of RAM allocated to the VM.

• XEON X 3210 fault-tolerant

  Hello

  I have a Dell PowerEdge 840 and 860 servers, they are also supposedly compatible with ESXi and vCenter.

  I downloaded the trial version of vCenter Server and ESXi and wanted to build a cluster.

  Unfortunately, this is not possible because it supports the CPU is not a fault-tolerance.

  These and the following hardware configurations

  Dell PowerEdge 840 and 860
  
  CPU: Intel Xeon X 3210 with VT turned on in the BIOS.
  RAM: 8 GB / system
  Hard drives: Dell 840 GB RAID 10 4 x 320
  Reference Dell 860 1, 2 x 500 GB RAID
  System: ESXi 4.10, 381 591
  VCENTER 4.1 345 043
  Network: a network of 100 MB of Internet traffic map
  and a single 1000 MB card for traffic network.

  According to Intel, the processor over VT is supported.

  
  Thanks for the help in advance.

  ICH verfuge über einen Dell Poweredge 840 und 860 server, sharp auch angeblich scripte sind mit Vcenter und ESXI.

  ICH habe mir die Testversion von Vcenter Server und ESXI runtergeladen und ein Cluster can actually wanted.

  Leider ist dies nicht possible, da die CPU´s keine Errortolerant unterstuzten.

  Es sich und die following Hardwarekonfigurationen more

  Dell Poweredge 840 und 860
  
  CPU: Intel Xeon X 3210 mit aktivierten VT im BIOS.
  Arbeitsspeicher: 8 GB I system
  Speaker: Dell RAID 10 4 x 320 GB 840
  Reference Dell 860 RAID 1 2 x 500 GB
  System: ESXI 4.10, 381591
  VCenter 4.1, 345043
  Netzwerk: I eine Netzwerkkarte 100 MB as Internettrafic
  und I eine Netzwerkkarte 1000 MB as den internal traffic.

  Laut Intel hat der oben genannte Prozessor auf support VT.

  
  Vielen Dank für die Hilfe im Voraus.

  3210 x is not supported for FT. http://KB.VMware.com/kb/1008027

• Fault tolerance limits

  I would like to implement fault tolerance for a couple of our virtual machines, but I was reading and I have a few questions.

  1. it is said that you must have 2 vmkernel NIC dedicated to fault tolerance. Can it be shared with vmotion NIC?

  2 FT does not support SMP. Is this still the case? We lack ESX 4 Update 1.

  3 FT does not support snapshots. VReplicator allows us to reproduce our vm. This creates a snapshot during replication. That are not or not be possible?

  Thank you

  Scott

  1. you need at least 1 vmkernal NETWORK card dedicated for FT (or a new VIRTUAL local network, if you have 10 GbE) there is a lot of traffic that will be flowing for this shot

  -You can see a design on my website http://kendrickcoleman.com/index.php?/Tech-Blog/vsphere-host-nic-configuration.html

  2. Yes. You can't have FT w / 1 vCPU VMs currently. But if you have some awesome Nehalem procs, you may only have 1vCPU for your boxes of criticism

  3. they will fail. The snapshots are not possible on the VMS FT. As a result, backups will not work. I know it's one of the huge problems of scenario best IP, Setup a script to make a virtual machine out of FT, run the backup, and then select FT. A lot of work for a final result.

• SAN multisite and VMware Fault Tolerance

  Hello

  My apologies if this is in the wrong section.

  I have a requirement for the two main rooms, with SAN and ESX hosts in each room.

  In total I have, for the sake of arguments, 200 VMS, with a split 50-50, so 100 in each room Basic.

  I want to use VMware of fault tolerance for machines remain operational in the event of a major failure or the other room Basic.

  I think I can use Multisite SAN to do.

  Please see attached diagram fo what I want to do, I know that the diagram is not correct but I drew it fast just to try to explain the scenario.

  What I want to know (or have help on) is:

  Is it possible to use fault tolerance in this way have no downtime in the result of a failure of basic room? (basic rooms are not very remote and use the same networks)

  How does multi-site SAN work, are there articles I can read to help me understand this?

  Multisite perhaps SAN iSCSI or fibrechannel?

  Thank you.

  SAN should resemble a single San for all ESXes. It doesn't matter how you do it.

  > If I my synchronous SAN mirror, might simply use FT for the vcenter as well?

  It is possible for the small environment. In general, vCenter requires 2 vCPU, while FT works for uniprocessor VMs only. But do not overestimate FT, it is not a universal solution and the universal answer.

  > Also with FT, can you specify the server host in the cluster to act as the secondary?

  Directly - no. The only way - to create link VM to any resource that is available for 2 ESXes only.

  ---

  MCSA, MCTS, VCP, VMware vExpert 2009

  http://blog.vadmin.ru

• Fault tolerant in consolidation scenarios

  How do people manage fault tolerance in consolidation scenarios? A client can know in advance that they want to use Fault Tolerance on some servers. Obviously, using fault tolerant on a percentage of servers has the potential to affect the number of servers required.

  The Consolidation scenario does not take into account FT AFAIK.

  You manually cover an instance of the virtual machine on ESX hosts as the failure of FT and must ensure that the customer is aware that there is a load CPU and additional network for her.

  Kind regards

  EvilOne

  VMware vExpert 2009

  NOTE: If your question or problem has been resolved, please mark this thread as answered and awarded points accordingly.

• VM vs VCB Backup fault tolerance?

  Hi all

  I'm looking for your suggestion and advice in using the Local SATA-II empty unused for my virtual machine data store.

  I have the following ESXi 4.0 build 164009 and a valid license of vSphere Essentials license, so I could use VCB, but the problem is that using NBD of the SAN in the backup server is much too slow :-| it took 55 hours to backup the whole score of VMFS 1 TB.

  and now, I think that rather than using the backup solution is it possible to clone the virtual machine on the

  fly to more than 2 store data such as cluster service fault tolerance? (in this case to the business data store and the)

  SAN_VMFS) in case there is a failure in the SAN, the virtual machine can run the

  Local data store

  Kind regards

  AWT

  Backup VM with VCB, backup system disks together just with VCB and backup of the data with the specialized software. For example if you have Oracle - place Oracle DB on another VMDK/RDM and backup tools with Oracle via 1Gbit link.

  Fault tolerance requires SAN and saves you more failure of the host only, not SAN failure.

  ---

  VMware vExpert 2009

  http://blog.vadmin.ru

• Network: Etherchannel vs. Fault Tolerance

  Here's my question.  I'm not a network guru but I understand if you assign NIC several ports to a virtual switch you gained transmit bandwidth (all ports are used to send), but that the same is not true on the receive side because you need a MAC and a layer of arbitration that can distribute traffic entering.  My hypothesis is that there is no way to go other than having two network adapters to the same switch and using Etherchannel trunking.

  So now, we have a trade off power.  If I choose alternative NIC to different switches for the fault tolerance, I am limited to only 1 GB on the side of the reception no matter what I do.

  If I have strange ESX hosts goes to switch A and even attending the B switch, it does not help much nor how many stores are building a reserve of 50% in their ESX capacity reservations.

  So assuming that my above assumptions are met, I'm curious to know what strategies and practices other stores allows to increase the pipeline of reception beyond 1 GB (without using 10gbE) without exposing to excessive exposure to a change of failure event.

  Thank you!

  Yes, that's basically it.

  I attended a VMWorld 2008 session given by a VMware employee who specializes in the robot of networking. He said that the "from port ID" is the method to use which is the reason why it is by default most recommended balancing. Hash TCP/IP method is OK, but has the configuration requirements of specific physical switch (EtherChannel), which makes it risky to be set up properly or poorly maintained. The hash of the IP would allow a simple VM for potentially communicate with multiple hosts on multiple physical links, but in most environments, it is not really necessary.

  Yes, when you have a redundant configuration of physical switches the redundant natachasery for the virtual switch should be distributed to multiple switches.

• Storage VMware fault tolerance.

  Hello.

  I was looking at the solution of vmware fault tolerance and have I have a question:

  You can store the primary and secondary VMs on databases of dirffent? If you can, provide this storage redundancy as well?

  http://www.VMware.com/products/fault-tolerance/

  Tanks in advance.

  Lars Eidsten

  This is the concept behind the product, but the product is not available yet... we expect 2009

  Have a llok at this paper, it should help now: http://www.vmware.com/files/pdf/practical_guide_bcdr_vmb.pdf

• NEITHER 9852 communication with fault tolerant CAN materials

  Hello

  I have a cRio 9074 and recently bought a module NI 9852 2-port low-speed/fault-tolerant CAN.

  It's my first attempt at network comms in cRio and I realized that none of the devices with that I want to communicate are immune to failures and fault-tolerant physical layer requires different endings to 'normal' high speed MAY (immediately after I broke the seal on the box, of course!)

  Is it possible that I can configure the physical layer for this configuration to work reliably (alebit to)< 125="" kbps="" and="" with="" no="" fault="">

  Kind regards

  Chris

  I'm sorry. The low speed / transceivers and breakdown-tolerant high speed MAY use different communication protocols.

  HS CAN is recessive when CANH and CANL are both to nominally under 2, 5V. It is dominant when CANH is 3.5V and CANL is 1, 5V.

  LS CAN is recessive when CANH is a CHANNEL and 0V to 5V. It is dominant when CANH is 3.6V and CANL is 1.4V.

  You can see that they are almost the same for the dominant, but different for recessive. In addition, the sequence of end between two buses is different. For a HS-bus, you usually resistance 120 ohm between CANH and CANL at both ends of your bus.  A bus of the LS, you have a terminating resistor separate for CANH and CANL (for RTH and RTL).