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Posted to commits@cassandra.apache.org by "Brandon Williams (Jira)" <ji...@apache.org> on 2021/02/26 14:16:00 UTC
[jira] [Commented] (CASSANDRA-16460) Document the side-effect of
Zero Copy Streaming when in a multiple data directories setup
[ https://issues.apache.org/jira/browse/CASSANDRA-16460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17291672#comment-17291672 ]
Brandon Williams commented on CASSANDRA-16460:
----------------------------------------------
LGTM, +1.
> Document the side-effect of Zero Copy Streaming when in a multiple data directories setup
> -----------------------------------------------------------------------------------------
>
> Key: CASSANDRA-16460
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16460
> Project: Cassandra
> Issue Type: Task
> Components: Documentation/Website
> Reporter: Yifan Cai
> Assignee: Yifan Cai
> Priority: Normal
> Attachments: doc-snapshot.png
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> During the compaction test task (CASSANDRA-16345), we discovered that when zero copy streaming (ZCS) is enabled, it can lead to the streamed files contain tokens that exceed the disk boundaries (only when using multiple data directories) on the target host. Since ZCS streams the entire SSTable as is.
> We should add a proper note to the [https://cassandra.apache.org/doc/latest/new/streaming.html#zero-copy-streaming] section to inform people when using the feature.
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