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

• Type: New Feature
• Status: Resolved
• Priority: Normal
• Resolution: Invalid
• Fix Version/s: 2.1.2
• Assignee: Unassigned
• Reporter: Tadayoshi Sato
• Created: 02/Oct/14 01:44
• Updated: 16/Apr/19 09:31
• Resolved: 23/Oct/14 02:15

Description

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?