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https://issues.apache.org/jira/browse/CASSANDRA-8615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14276123#comment-14276123
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Brandon Williams commented on CASSANDRA-8615:
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bq. Should investigate and fix the cause instead.
+1, 2.0 has been out quite a while now and I've never heard of anyone being
against SR - just the opposite in fact.
> Create -D flag to disable speculative retry by default
> ------------------------------------------------------
>
> Key: CASSANDRA-8615
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8615
> Project: Cassandra
> Issue Type: Improvement
> Reporter: J.B. Langston
>
> Some clusters have shown increased latency with speculative retry enabled.
> Speculative retry is enabled by default when upgrading from 1.2 to 2.0, and
> for large clusters it can take a long time to complete a rolling upgrade,
> during which time speculative retry will be enabled. Therefore it would be
> helpful to have a -D flag that will disable it by default during an upgrade.
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