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https://issues.apache.org/jira/browse/CASSANDRA-14499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16506549#comment-16506549
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Jeremiah Jordan commented on CASSANDRA-14499:
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isn't this pretty easy to do with OS level settings? Getting this tracking
right across all places we uses disk seems like something we are bound to fail
at, where using your OS would not?
> node-level disk quota
> ---------------------
>
> Key: CASSANDRA-14499
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14499
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Jordan West
> Assignee: Jordan West
> Priority: Major
>
> Operators should be able to specify, via YAML, the amount of usable disk
> space on a node as a percentage of the total available or as an absolute
> value. If both are specified, the absolute value should take precedence. This
> allows operators to reserve space available to the database for background
> tasks -- primarily compaction. When a node reaches its quota, gossip should
> be disabled to prevent it taking further writes (which would increase the
> amount of data stored), being involved in reads (which are likely to be more
> inconsistent over time), or participating in repair (which may increase the
> amount of space used on the machine). The node re-enables gossip when the
> amount of data it stores is below the quota.
> The proposed option differs from {{min_free_space_per_drive_in_mb}}, which
> reserves some amount of space on each drive that is not usable by the
> database.
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