replica questions

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Hi All,

I’ve a production cluster made of 8 nodes, 166 OSDs and 4 Journal SSD every 5 OSDs with replica 2 for a total RAW space of 150 TB.
I’ve few question about it:

  • It’s critical to have replica 2? Why?
  • Does replica 3 makes recovery faster?
  • Does replica 3 makes rebalancing and recovery less heavy for customers? If I lose 1 node does replica 3 reduce the IO impact respect a replica 2?
  • Does read performance increase with replica 3?

Thank you
Regards
Matteo

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