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https://issues.apache.org/jira/browse/CASSANDRA-15234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17159846#comment-17159846
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Benedict Elliott Smith commented on CASSANDRA-15234:
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Thanks Caleb for the reminder. I've pushed another approach, that groups
options by the reason the operator cares about them, namely: {{cluster}}-wide
settings (partitioner, token etc), {{disk}} options that specify strategy,
throttle throughput etc, {{memory}} options that allocate heap or direct memory
resources, {{concurrency}} that constrain the number of operations or threads
committed to tasks, {{internode}} and {{client}} networking options,
{{feature}} options and {{log}} options for our warning thresholds etc. It was
taking a while, and it might not be well received, so I only went about 90% of
the way so that the approach can receive some feedback. Obviously, this would
necessitate a different approach to the headline comments, wherein we might
want to list the parameters users might care about in prose alongside
explanations for why they might care.
I personally would like to propose we also introduce a dual system for updating
properties, wherein we can accept the nested namespace versions, as well as
e.g. dot-delimited versions. e.g. {{disk.throttle.compaction: 10MiB/s}}
[~e.dimitrova]: in going through the yaml, I noticed that you have used mbps in
many places, but I thought we had previously agreed that any {{bps}} was
ambiguous, since it can mean bits or bytes? I thought we had settled on MiB/s
so that there could be no ambiguity? (Since MB/s is also ambiguous -
technically meaning 1000s, but often meaning powers of 2)?
> 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-beta
>
> 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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