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https://issues.apache.org/jira/browse/CASSANDRA-10876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16498508#comment-16498508
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Tania S Engel commented on CASSANDRA-10876:
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In 3.11.1 we still see these warnings even when we are inserting into multiple
tables with the same partition key. The comment above from Patrick seems to
indicate a partition key is for one keyspace.table. But I thought a partition
key was a value that hashed to the same value. Is it still a burden on the
coordinator worthy of a warning if we do a batch insert to 4 tables with the
same partition key ({color:#333333}Day{color})? For example if we do a batch
insert into these 2 tables, is that considered a single partition insert and if
so why is there a warning?
CREATE TABLE Log_User (Day timestamp, LogTime timeuuid,
{color:#333333}UserID{color} int) PRIMARY KEY ({color:#333333}Day {color},
UserID, LogTime)
CREATE TABLE Log_Event( Day timestamp, LogTime timeuuid, EventID int)
{color:#333333}PRIMARY KEY ({color}{color:#333333}Day {color}{color:#333333},
EventID , LogTime){color}
> Alter behavior of batch WARN and fail on single partition batches
> -----------------------------------------------------------------
>
> Key: CASSANDRA-10876
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10876
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Patrick McFadin
> Assignee: Sylvain Lebresne
> Priority: Minor
> Labels: lhf
> Fix For: 3.6
>
> Attachments: 10876.txt
>
>
> In an attempt to give operator insight into potentially harmful batch usage,
> Jiras were created to log WARN or fail on certain batch sizes. This ignores
> the single partition batch, which doesn't create the same issues as a
> multi-partition batch.
> The proposal is to ignore size on single partition batch statements.
> Reference:
> [CASSANDRA-6487|https://issues.apache.org/jira/browse/CASSANDRA-6487]
> [CASSANDRA-8011|https://issues.apache.org/jira/browse/CASSANDRA-8011]
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