Yifan Cai created CASSANDRA-17142:
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Summary: Limit the maximum hints size per host
Key: CASSANDRA-17142
URL: https://issues.apache.org/jira/browse/CASSANDRA-17142
Project: Cassandra
Issue Type: Improvement
Components: Consistency/Hints
Reporter: Yifan Cai
Assignee: Yifan Cai
The hints system defines a time window, i.e. max_hint_window_in_ms, to store
the hints.
It defines no limit on how much data can be kept during the time window. The
hints can grow excessively and make the node running out of disk. In such
scenario, the operators have to truncate the hints manually.
I'd propose that in addition to the conventional hints window, operators should
be able to define the maximum hints size per host, i.e.
max_hints_size_per_host_in_mb, to provide an another layer of protection. A
node stops to store hints for the down node whenever it reaches to the time cap
or the size cap. In order to not surprise the users, the config should be
disabled by default. It should also be configurable via JMX.
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