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https://issues.apache.org/jira/browse/CASSANDRA-13279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Romain Hardouin updated CASSANDRA-13279:
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Summary: Table default settings file (was: Table settings file)
> Table default settings file
> ---------------------------
>
> Key: CASSANDRA-13279
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13279
> Project: Cassandra
> Issue Type: Wish
> Components: Configuration
> Reporter: Romain Hardouin
> Priority: Minor
> Labels: config, documentation
>
> Following CASSANDRA-13241 we often see that there is no one-size-fits-all
> value for settings. We can't find a sweet spot for every use cases.
> It's true for settings in cassandra.yaml but as [~brstgt] said for
> {{chunk_length_in_kb}}: "this is somewhat hidden for the average user".
> Many table settings are somewhat hidden for the average user. Some people
> will think RTFM but if a file - say tables.yaml - contains default values for
> table settings, more people would pay attention to them. And of course this
> file could contain useful comments and guidance.
> Example with SSTable compression options:
> {code}
> # General comments about sstable compression
> compression:
> # First of all: explain what is it. We split each SSTable into chunks,
> etc.
> # Explain when users should lower this value (e.g. 4) or when a higher
> value like 64 or 128 are recommended.
> # Explain the trade-off between read latency and off-heap compression
> metadata size.
> chunk_length_in_kb: 16
>
> # List of available compressor: LZ4Compressor, SnappyCompressor, and
> DeflateCompressor
> # Explain trade-offs, some specific use cases (e.g. archives), etc.
> class: 'LZ4Compressor'
>
> # If you want to disable compression by default, uncomment the following
> line
> #enabled: false
> {code}
> So instead of hard coded values we would end up with something like
> TableConfig + TableDescriptor à la Config + DatabaseDescriptor.
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