[
https://issues.apache.org/jira/browse/CASSANDRA-9673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14726964#comment-14726964
]
Aleksey Yeschenko commented on CASSANDRA-9673:
----------------------------------------------
dtests failing exactly the same 8 tests that the vanilla cassandra-3.0 branch,
utests have 2 UDF access control failures and the relatively common
recoverymanager timeout.
Committed as
[53a177a9150586e56408f25c959f75110a2997e7|https://github.com/apache/cassandra/commit/53a177a9150586e56408f25c959f75110a2997e7]
to cassandra-3.0 and merged with trunk.
Thank you for your work and your patience.
> Improve batchlog write path
> ---------------------------
>
> Key: CASSANDRA-9673
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9673
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Aleksey Yeschenko
> Assignee: Stefania
> Labels: performance
> Fix For: 3.0 beta 2
>
> Attachments: 9673_001.tar.gz, 9673_004.tar.gz,
> gc_times_first_node_patched_004.png, gc_times_first_node_trunk_004.png
>
>
> Currently we allocate an on-heap {{ByteBuffer}} to serialize the batched
> mutations into, before sending it to a distant node, generating unnecessary
> garbage (potentially a lot of it).
> With materialized views using the batchlog, it would be nice to optimise the
> write path:
> - introduce a new verb ({{Batch}})
> - introduce a new message ({{BatchMessage}}) that would encapsulate the
> mutations, expiration, and creation time (similar to {{HintMessage}} in
> CASSANDRA-6230)
> - have MS serialize it directly instead of relying on an intermediate buffer
> To avoid merely shifting the temp buffer to the receiving side(s) we should
> change the structure of the batchlog table to use a list or a map of
> individual mutations.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
