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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-6936) Make all byte representations of types comparable by their unsigned byte representation only
Date Wed, 08 Jun 2016 19:10:21 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

T Jake Luciani updated CASSANDRA-6936:
--------------------------------------
    Fix Version/s:     (was: 3.x)
                   4.x

> Make all byte representations of types comparable by their unsigned byte representation
only
> --------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6936
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6936
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Benedict
>            Assignee: Branimir Lambov
>              Labels: compaction, performance
>             Fix For: 4.x
>
>
> This could be a painful change, but is necessary for implementing a trie-based index,
and settling for less would be suboptimal; it also should make comparisons cheaper all-round,
and since comparison operations are pretty much the majority of C*'s business, this should
be easily felt (see CASSANDRA-6553 and CASSANDRA-6934 for an example of some minor changes
with major performance impacts). No copying/special casing/slicing should mean fewer opportunities
to introduce performance regressions as well.
> Since I have slated for 3.0 a lot of non-backwards-compatible sstable changes, hopefully
this shouldn't be too much more of a burden.



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