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Fwd: A quick question on unlogged batch

Read this: https://docs.datastax.com/en/cql/3.3/cql/cql_reference/batch_r.html
Please use batch (any type of batch) for statements that only concerns a single partition, otherwise it cause a lot of performance degradation on your cluster and after a while throughput would be alot less than parallel single statements with executeAsync.

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============ Forwarded message ============
From : wxn002@xxxxxxxxxxxxx
To : "user"<user@xxxxxxxxxxxxxxxxxxxx>
Date : Thu, 01 Nov 2018 10:48:33 +0330
Subject : A quick question on unlogged batch
============ Forwarded message ============

Hi All,

What's the difference between logged batch and unlogged batch? I'm asking this question it's because I'm seeing the below WARNINGs after a new app started writting to the cluster. 

WARNING in system.log:
Unlogged batch covering 135 partitions detected against table [cargts.eventdata]. You should use a logged batch for atomicity, or asynchronous writes for performance

Best regards,