You must design and implement a cost-effective data recovery solution

Discussion in '70-414' started by metro, Nov 29, 2015.

  1. metro

    metro Well-Known Member
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    A company has offices in Seattle and Shanghai. You use Hyper-V Server as the server 2012 R2 virtualization platform. Each office has a secured server room where all the servers are located. Eighty percent of the company’s servers are virtual. The company signs a data center services agreement with a vendor that is located in New York. The agreement includes a 1GB per second link to the collocation facility in New York.

    The link between the Seattle and Shanghai offices is slow and unreliable. You must design and implement a cost-effective data recovery solution to replicate virtual servers from Seattle to both New York and Shanghai locations.

    The solution must support the following requirements.

    . Perform failover replication from Seattle to New York.
    . Perform scheduled replication between as many location as possible.
    . In case of a disaster, a fast failover should be possible to the replicated servers with minimal changes required to the existing infrastructure.

    Which two actions should you perform? Each correct answer presents a part of the solution.

    A) Use Hyper-V Replica unplanned failovers.
    B) User Hyper-V Replica planned failovers.
    C) Configure the Seattle Hyper-V server as the primary replica server and the New York Hyper-V server as the secondary replica Server
    D) Configure the Seattle Hyper-V server as the primary replica server and the Shanghai Hyper-V server as the secondary replica server
     
  2. fc

    fcporto Member
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    B) User Hyper-V Replica planned failovers.
    D) Configure the Seattle Hyper-V server as the primary replica server and the Shanghai Hyper-V server as the secondary replica server
     
  3. sh

    shushpan Member
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    Why it should be B) planned failovers but not A) unplanned failovers ?
    As far as I know, planned failovers are initiated on primary server, and case states that we will use them after a disaster/
     
  4. cu

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    The first requirement says "Perform failover replication from Seattle to New York."

    You need to configure New York as the replica server first. Then perform a planned failover to New York. Otherwise you'll have to initiate an unplanned failover from New York, and do a reverse replication from Seattle for the delta data. If the company is 80% virtualized, this is a lot of delta data to reverse replicate for no reason, and doesn't make sense as an answer.

    Planned failover to New York is correct for requirement 1.

    But this solution set only completes the first requirement. After the initial failover to New York is completed and New York becomes the primary server, you need to configure Shanghai as an additional replica server. Then anytime a disaster strikes, you can perform an unplanned failover from one of the replica servers. This question should be asking which 2 actions should you perform first?

    The planned/unplanned is not a setting. Failover is performed from the primary host as a planned failover, or performed from the replica server as an unplanned failover. Unplanned doesn't capture pending changes so you would want to use planned whenever possible. A disaster hasn't struck yet, so there's no reason to use unplanned failover.
     
    #4 cupertinosucks, Feb 1, 2016
    Last edited: Feb 1, 2016
  5. op

    openbpart Member
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    Guys as per below explanation, will go with option A & C
    A: Unplanned Failover is an operation initiated on the replica VM when the primary VM/site is hit by

    a disaster.
    Incorrect:
    Not D: We should not use Shanghai as the secondary replica server as the link between the Seattle
    and Shanghai offices is slow and unreliable.
    Not B: We must protect against disaster, so we cannot use planned failovers.
    Reference: Types of failover operations in Hyper-V Replica-Part III - Unplanned Failover
    http://blogs.technet.com/b/virtualization/archive/2012/08/08/types-of-failover-operations-in-hyper-
    v-replica-part-iii-unplanned-failover.aspx

    If anyone has doubt or
    :confused:
     
  6. gr

    grimacester Member
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    I agree with cupertinosucks, though this question is terrible. The question expects you to realize that New York needs to be the primary site, or at least a site. So to make the first 'dot' "Perform failover replication from Seattle to New York" work, you perform a "B) User Hyper-V Replica planned failovers.". Then after New York is setup as your main site, you add in the other sites as "D) Configure the Seattle Hyper-V server as the primary replica server and the Shanghai Hyper-V server as the secondary replica server". The problem is in hyper-v replicas only seem to be called "primary" or "replica" from what I can tell, there is no "secondary replica". This link at least claims it possible: https://social.technet.microsoft.com/Forums/windowsserver/en-US/190f7053-600d-475e-bb60-91ca54190521/hyper-v-replica-for-multiple-sites?forum=winserverhyperv .
     
  7. op

    openbpart Member
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    grimacester from your statement, you mean the two right answers as follow:

    B) User Hyper-V Replica planned failovers.
    D) Configure the Seattle Hyper-V server as the primary replica server and the Shanghai Hyper-V server as the secondary replica server

    As both answers already fcporto mention above?
     
  8. BluAlien

    BluAlien Member
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    Dear visitor, you need to Register or Login to view links on Certify Chat.

    The first requirement says "Perform failover replication from Seattle to New York."

    You need to configure New York as the replica server first. Then perform a planned failover to New York. Otherwise you'll have to initiate an unplanned failover from New York, and do a reverse replication from Seattle for the delta data. If the company is 80% virtualized, this is a lot of delta data to reverse replicate for no reason, and doesn't make sense as an answer.

    Planned failover to New York is correct for requirement 1.

    But this solution set only completes the first requirement. After the initial failover to New York is completed and New York becomes the primary server, you need to configure Shanghai as an additional replica server. Then anytime a disaster strikes, you can perform an unplanned failover from one of the replica servers. This question should be asking which 2 actions should you perform first?

    The planned/unplanned is not a setting. Failover is performed from the primary host as a planned failover, or performed from the replica server as an unplanned failover. Unplanned doesn't capture pending changes so you would want to use planned whenever possible. A disaster hasn't struck yet, so there's no reason to use unplanned failover.
    Click to expand...

    To do failover replication, planned or unplanned is mandatory to enable Hyper-V VM replication. The request is to "Perform failover from Seattle to New York", so C must be selected. Replication once configured and activated replicates VM differences every 5, 15 or 30 min so the destination replica is always updated and any failover, planned or in case of disaster unplanned, can be done in a fast time and with minimal changes using Planned or Unplanned Failover options. Also is then possible to enable extend replication and do a secondary replica from New York to Shangai using the "Compress the data that is transmitted over the network" just to save bandwidth over slow network, but this solution is not in the options. Checked in LAB.

    For this reasons the answer are A and C.
     

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