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https://issues.apache.org/jira/browse/CASSANDRA-8038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14164049#comment-14164049
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Takenori Sato commented on CASSANDRA-8038:
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{quote}
No, not right. Non-RR requests also return the tombstones, as they should,
because there is no guarantee that all the nodes participating in the requests
have all the tombstones. That's eventually consistent distributed deletes for
you.
{quote}
Oh, perhaps, my question was bad. I understand non-RR requests also return
tombstones.
My question is why slice query response contains column tombstones at all.
Though only live columns are returned to a client.
> 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
> Components: Core
> Reporter: Takenori Sato
> Fix For: 2.1.1
>
> Attachments: CASSANDRA-8038-v2.txt, CASSANDRA-8038-v3.txt,
> CASSANDRA-8038.txt
>
>
> 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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