Ariel Weisberg created CASSANDRA-14635:
------------------------------------------
Summary: Support table level configuration of monotonic reads
Key: CASSANDRA-14635
URL: https://issues.apache.org/jira/browse/CASSANDRA-14635
Project: Cassandra
Issue Type: Improvement
Components: Coordination
Reporter: Ariel Weisberg
In CASSANDRA-10726 it was discussed that allowing expert users to forgo
monotonic reads might be desirable. It is practical to control monotonicity of
reads at a fine grained level because it involves changing the behavior of read
repair on a per read basis.
Per CASSANDRA-14593 we already don't preserve update atomicity down to the
column level. You could read the key out of a row and read repair the key, pass
the key to another process which attempts to read the value, but finds the
value is null because read repair only repairs the data (including columns)
that is part of the read. IMO it's a stretch to say that reads are monotonic.
It is technically correct, the best kind of correct, but far from as useful as
it should be.
An initial implementation could make read repair asynchronous or forgo read
repair entirely. This would improve the throughput and latency of reads.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
