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https://issues.apache.org/jira/browse/CASSANDRA-15234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17148441#comment-17148441
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Benedict Elliott Smith commented on CASSANDRA-15234:
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My personal view is that for configuration parameters, so long as it is
costless to maintain backwards compatibility we should do so. This includes
parameters we remove between versions because we no longer use them (unless
there is some semantic implication that the operator needs to consider). So,
yes, indefinitely (but also with continued logging that the parameter is
deprecated and might be removed).
I think the same should be true of all of our public APIs: deprecate
immediately, but only remove once the cost to maintain becomes unbearable.
> Standardise config and JVM parameters
> -------------------------------------
>
> Key: CASSANDRA-15234
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15234
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Config
> Reporter: Benedict Elliott Smith
> Assignee: Ekaterina Dimitrova
> Priority: Normal
> Fix For: 4.0-alpha
>
> Attachments: CASSANDRA-15234-3-DTests-JAVA8.txt
>
>
> We have a bunch of inconsistent names and config patterns in the codebase,
> both from the yams and JVM properties. It would be nice to standardise the
> naming (such as otc_ vs internode_) as well as the provision of values with
> units - while maintaining perpetual backwards compatibility with the old
> parameter names, of course.
> For temporal units, I would propose parsing strings with suffixes of:
> {{code}}
> u|micros(econds?)?
> ms|millis(econds?)?
> s(econds?)?
> m(inutes?)?
> h(ours?)?
> d(ays?)?
> mo(nths?)?
> {{code}}
> For rate units, I would propose parsing any of the standard {{B/s, KiB/s,
> MiB/s, GiB/s, TiB/s}}.
> Perhaps for avoiding ambiguity we could not accept bauds {{bs, Mbps}} or
> powers of 1000 such as {{KB/s}}, given these are regularly used for either
> their old or new definition e.g. {{KiB/s}}, or we could support them and
> simply log the value in bytes/s.
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