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https://issues.apache.org/jira/browse/CASSANDRA-4775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13526459#comment-13526459
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Jonathan Halliday commented on CASSANDRA-4775:
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RFE: consider allowing configurable subtyping of counters to support similar
behaviours. Existing counters implement SUM(...) but with relatively minor
modifications to the merge step the same architecture could also support
MIN(...) and MAX(...) semantics which currently require locking or other
unpleasant solutions. AVG(...) is harder, needing both the sum and item count
to be stored under the hood. Even more advanced is bitwise logical AND/OR/...
on bitsets rather than numbers, such as would allow for hyperloglog approximate
cardinality counting or other similar operations.
> Counters 2.0
> ------------
>
> Key: CASSANDRA-4775
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4775
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Arya Goudarzi
> Labels: counters
> Fix For: 2.0
>
>
> The existing partitioned counters remain a source of frustration for most
> users almost two years after being introduced. The remaining problems are
> inherent in the design, not something that can be fixed given enough
> time/eyeballs.
> Ideally a solution would give us
> - similar performance
> - less special cases in the code
> - potential for a retry mechanism
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