[jira] [Created] (CASSANDRA-8038) A new config option to ignore column tombstones for RR or not

["Takenori Sato (JIRA)" <ji...@apache.org>]

Takenori Sato created CASSANDRA-8038:
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             Summary: A new config option to ignore column tombstones for RR or not
                 Key: CASSANDRA-8038
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8038
             Project: Cassandra
          Issue Type: New Feature
            Reporter: Takenori Sato


CASSANDRA-6117 addressed the death of Cassandra by column tombstones, and whose fix was to raise an error when reading more tombstones than a threshold. I think it is an emergency action, rather than a fix.

We have had this issue for long. So I wondered, in the first place, if it is really necessary to collect non-gc-able tombstones, which could cause concurrent mode failures, and OOM eventually? 

Actually, I was surprised by the fact that Cassandra takes them into consideration. Rather, I prefer to raise a threshold, and tell Cassandra to ignore tombstones for digest calculation of RR because a repair is running regularly. 

I guess there are some people like me, but not all. So what about adding a new configuration option if Cassandra ignores column tombstones for RR or not?



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