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https://issues.apache.org/jira/browse/CASSANDRA-8634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ariel Weisberg updated CASSANDRA-8634:
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Description:
The initial commit log compression implementation can do about 240
megabytes/second (uncompressed input) on a fast (500 megabytes/sec) SSD.
This is basically what I measured as the throughput of LZ4 against the same
data.
Assuming a 1.5x compression ratio that is 160 megabytes/second of output.
Enough to saturate a spinning disk, but not an SSD.
was:
The initial commit log compression implementation can do about 240
megabytes/second (uncompressed input) on a fast (500 megabytes/sec) SSD.
Assuming a 1.5x compression ratio that is 160 megabytes/second of output.
Enough to saturate a spinning disk, but not an SSD.
> Multi-thread commit log compression
> -----------------------------------
>
> Key: CASSANDRA-8634
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8634
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Ariel Weisberg
> Labels: performance
>
> The initial commit log compression implementation can do about 240
> megabytes/second (uncompressed input) on a fast (500 megabytes/sec) SSD.
> This is basically what I measured as the throughput of LZ4 against the same
> data.
> Assuming a 1.5x compression ratio that is 160 megabytes/second of output.
> Enough to saturate a spinning disk, but not an SSD.
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