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https://issues.apache.org/jira/browse/CASSANDRA-3881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13216607#comment-13216607
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Peter Schuller commented on CASSANDRA-3881:
-------------------------------------------

Apologies for spamming, but I want to make clear: This applies when 
bootstrapping nodes into a ring with at least one other node already 
bootstrapping (otherwise calculatePendingRanges won't get called repeatedly as 
the ring is populated in the storage service). The greater the number of 
bootstrapping nodes, the greater the probability of pending range calculations 
having to be done more often (it is determined by how many nodes get populated 
into the storage service' notion of the ring before the first bootstrapping 
node is seen), and the greater the probability of initiating bootstrap based on 
an incomplete ring view.
                
> reduce computational complexity of processing topology changes
> --------------------------------------------------------------
>
>                 Key: CASSANDRA-3881
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3881
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Peter Schuller
>            Assignee: Peter Schuller
>
> This constitutes follow-up work from CASSANDRA-3831 where a partial 
> improvement was committed, but the fundamental issue was not fixed. The 
> maximum "practical" cluster size was significantly improved, but further work 
> is expected to be necessary as cluster sizes grow.

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