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From aweisberg <...@git.apache.org>
Subject [GitHub] cassandra pull request #224: 14405 replicas
Date Thu, 10 May 2018 16:27:04 GMT
Github user aweisberg commented on a diff in the pull request:

    https://github.com/apache/cassandra/pull/224#discussion_r187383489
  
    --- Diff: doc/source/architecture/dynamo.rst ---
    @@ -74,6 +74,26 @@ nodes in each rack, the data load on the smallest rack may be much
higher.  Simi
     into a new rack, it will be considered a replica for the entire ring.  For this reason,
many operators choose to
     configure all nodes on a single "rack".
     
    +.. _transient-replication:
    +
    +Transient Replication
    +~~~~~~~~~~~~~~~~~~~~~
    +
    +Transient replication allows you to configure a subset of replicas to only replicate
data that hasn't been incrementally
    +repaired. This allows you to trade data redundancy for storage usage, and increased read
and write throughput. For instance,
    +if you have a replication factor of 3, with 1 transient replica, 2 replicas will replicate
all data for a given token
    --- End diff --
    
    Use the 3 replicas upgraded to 5 case. It's not a tradeoff of redundancy at all. We can't
message that at all and it's not true.


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