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Posted to commits@cassandra.apache.org by "Caleb Rackliffe (Jira)" <ji...@apache.org> on 2020/08/06 21:35:00 UTC
[jira] [Comment Edited] (CASSANDRA-15393) Add byte array backed
cells
[ https://issues.apache.org/jira/browse/CASSANDRA-15393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17172676#comment-17172676 ]
Caleb Rackliffe edited comment on CASSANDRA-15393 at 8/6/20, 9:34 PM:
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There is a fair number of unit test [failures|https://app.circleci.com/pipelines/github/maedhroz/cassandra/94/workflows/9a0adbdc-56ae-48fd-91a7-1104afcba560/jobs/463], although they seem to mostly predate the rebase. (I'll probably sidestep them until I've done a first pass at review...)
was (Author: maedhroz):
There is a fair number of unit test [failures|https://app.circleci.com/pipelines/github/maedhroz/cassandra/94/workflows/9a0adbdc-56ae-48fd-91a7-1104afcba560/jobs/463], although they seem to mostly predate the rebase.
> Add byte array backed cells
> ---------------------------
>
> Key: CASSANDRA-15393
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15393
> Project: Cassandra
> Issue Type: Sub-task
> Components: Local/Compaction
> Reporter: Blake Eggleston
> Assignee: Blake Eggleston
> Priority: Normal
> Fix For: 4.0-beta
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> We currently materialize all values as on heap byte buffers. Byte buffers have a fairly high overhead given how frequently they’re used, and on the compaction and local read path we don’t do anything that needs them. Use of byte buffer methods only happens on the coordinator. Using cells that are backed by byte arrays instead in these situations reduces compaction and read garbage up to 22% in many cases.
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