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High Availability, Fault Groups - questions

  • November 22, 2019
  • 1 reply
  • 12 views
MaciejPaliwoda
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Team,
Have and urgent question about HA - HW configuration:

  • Customer has 3 server rooms in Data Center, and want to place 11 nodes - in a following configuration 5/5/1 - to have N/2+1 available in case of Rack Failure to keep Cluster up and running. Rooms will be connected directly with the wire (switch will be in a rack in each room) - so network should not be an issue.
    questions:

  • is it a good approach to have servers in 5/5/1 configuration

  • How we should configure fault goups to avoid replicate budy projections into same fault group? 2 FG (5+6) or 3FG (5 + 5 +1)?

Thanks in advance for fast response!

    1 reply

    praveshbhardwaj
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    • praveshbhardwaj
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    • November 22, 2019

    Maciej,
    2 FG (5+6) will not be fault tolerant if rack with 6 nodes go down.
    Fault groups make sense with at least 3 fault groups or more. And with that, I think 3FG (4 + 4 +3) should be more obvious than 3FG (5 + 5 +1). Unless there was a specific reason for considering 3FG (5 + 5 +1).
    Regards,

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