Jay Patel created CASSANDRA-8854:
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Summary: Support for Async Atomic Batch
Key: CASSANDRA-8854
URL: https://issues.apache.org/jira/browse/CASSANDRA-8854
Project: Cassandra
Issue Type: New Feature
Reporter: Jay Patel
Sometime use case demands atomicity (using C* logged batch) across multiple DML
statements; however, in order to minimize the end user latency, do not want to
wait for all the statements to be executed.
For instance, would like to have something like:
BEGIN BATCH
Sync - INSERT INTO users (userID, name, email) VALUES ('user1', ‘first user’,
’[email protected]')
Async - INSERT INTO users_by_name (name, userID) VALUES (‘first user’,
'user1’);
Async - INSERT INTO users_by_email (name, userID) VALUES (’[email protected]’,
'user1’);
..... more Async statements!
APPLY BATCH;
Once the batch is serialized to the batchlog table and the sync statements are
executed, coordinator should return response without waiting for execution of
async batch statements.
Some of the use cases that we’re working on will get benefited significantly in
terms of latency reduction. I can take a first cut at it if we don’t see any
concerns supporting it.
Also, need some discussions around specifying sync/async tag for each statement
in the batch.
Thoughts welcome. Thanks!
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