Similar Questions

• 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

• SAN with VMware Fault Tolerance storage redundancy

  We built a new data center, with the idea in mind to use VMware Fault Tolerance to create a virtual environment without service interruption between two data centers.  The goal is to have the VMs to continue to operate even with the loss of access to an entire datacenter, including SAN storage units.

  I'm looking for a way for a vSphere 4 virtual infrastructure to be able to write to storage replicated in two different datacenters (with low latency of connections between data centers).  We can do with the networks and host servers, but I found nothing in the documentation of tolerance to failures to mention something else 'shared storage' we have experienced a failure of the individual units of SAN storage (including total loss of hundreds of virtual machines) and hope that we can eliminate the unit of storage as a single point of failure.

  Someone did he do it, or how it could be done?

  Hello

  In order to clarify what idle-jam talks about, you can watch this video of HP and VMware on YouTube.

  -hth

  Kind regards.

• 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.'

• Fault tolerant on VMware linked clone Desktop

  Hello

  someone may answer whether it is possible to enable fault tolerance on linked clone VM to a master, through composer.

  Client wants to protect in this way, hundreds of virtual office, I thought about using a channel 10 gigabit for the communication of FT logging, that think u dou everything?

  Thank you very much

  First off it is only recommended to have 4 FT running for each host, so would need you 25 hosts make 100 mV.

  Secondly, I am sure that this is taken care with view.

  Thirdly, also sure FT requires full VMs, clones and unrelated, so your cost of SAN will rocket sky.

  Fourth and this is my favorite, it is exteremly high Windows going down until your host blocks (ESX breaks down).  FT no help even in this situation as if OS1 block him operating system on the other server will crash at the same time.

  FT is designed for mission critical Server VM, not of VDI.

  Gunnar

• VMware Fault Tolerance

  Hello

  VMware Fault Tolerance is a good solution for virtual machines in Production? What is the requirements, benefits and the Limitations of FT?

  Hello

  Yes FT is the good soltion for Production VM, Pleace check the bottom of the article for more information

  http://www.google.co.in/#sclient=psy&hl=en&source=hp&q=VMware+Fault+Tolerance+overview%2C+requirements%2C+benefits+%26+Limitations+site%3A+blog.srinfotec.com&pbx=1&oq=VMware+Fault+Tolerance+overview%2C+requirements%2C+benefits+%26+Limitations+site:+blog.srinfotec.com&aq=f&aqi=&aql=&gs_sm=e&gs_upl=1716l8806l1l9026l25l23l0l0l0l0l496l5193l0.4.17.0.1l22l0&bav=on.2,or.r_gc.r_pw.&fp=1ad7a99e02298f12&biw=1366&bih=604

  or

  http://blog.srinfotec.com/?p=243

  concerning

  Rohit

• 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

• Fault tolerance options

  Given an ESXi implementation is a "proof of concept" for a possible implementation of more complex VI, how ESXi can be configured to make as possible fault tolerance?

  • ESXi can manage the RAID HD?

  • 2 ESXi servers are configurable so that if there is a failure of HW an administrator can move the virtual machines managed by one server to another?

  • Can an external storage 2 servers ESXi fault a little more tolerant?

  Suggestions, pointers and advice welcome...

  Marius

  If you have no central storage as a San you will not be able to use the features of "fault-tolerant" VI like HA, DRS and vMotion.

  I would def make arrangements for a temporary SAN storage shared for your two esxi servers, so you can show all the benefits.

  You can use openfiler if you do not have a SAN just laying around, but of course everyone (just in case if http://openfiler.com/)

  Andy, VMware Certified Professional (VCP), http://www.vmadmin.co.uk/

  If you have found this information useful please give points by using the buttons at the top of the page accordingly.

• Fault tolerance of CAN 'high speed '.

  There is a lot of information on "Low Speed CAN" being "Fault tolérant."  In other words, every time CAN - H or CAN - L is shorted to either on the ground or + 12v, the other non-court-circuit CAN online will continue to work, but with the problems of timing and reduced immunity to noise.  But there is an absolute lack of information on the high-speed CAN fault tolerance (i.e., 125 kb/s speeds).  And if one wants to face that at high speed is as Fault Tolerant as SLOW, why then isn't high speed MAY also deemed "Fault Tolerant"?

  Can someone point me to an ISO document or other official document that specifically speaks to about high-speed CAN and what happens when lines CAN be is shorted to ground or + 12v?  I need a 'official' source of information on this subject, not only his own personal experience or hear - say.

  Thank you.

  ISO 11898-2: 2003 should be a good source for an official response

  http://www.ISO.org/ISO/catalogue_detail.htm?CSNUMBER=33423

• 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

• 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).

• WLC balancing without fault tolerance

  Hello, I need 13 points of service and provide load balancing between all connected AP

  Fault tolerance is not a concern at the present time where my reasoning below.

  I look at by specifying two 4402 controllers with the AP 12 license and configure them both in a single group of mobility, I then manually specify the primary access point controller and distributed accordingly between controllers one on access point two controllers for example 7 and 6 on the other.

  Could I ask if it could it be an acceptable method?

  Concerning

  Hi Mark,

  It is a perfectly acceptable design. If/when fault tolerance becomes a review a 25 model AP can be purchased to provide protection for the two 12 AP WLC Fail-over.

  I hope this helps!

  Rob

• On R2 2012 Windows fault tolerance

  We had a problem with fault tolerance.

  We tried to use a Windows Server 2012 R2 for FT, but when they tried to activate it on the virtual machine; 1 vCPU is allowed.

  It does not have a configuration of 2 or 4 vCPU.

  Probably you have already tried it, but you use the Web Client?

  The FT for more than 1 CPU is something you can do only by using the web client.

  Best regards

• 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.