[jira] [Updated] (CASSANDRA-8634) Multi-thread commit log compression

2018-11-18 Thread C. Scott Andreas (JIRA)


 [ 
https://issues.apache.org/jira/browse/CASSANDRA-8634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

C. Scott Andreas updated CASSANDRA-8634:

Component/s: Compression

> Multi-thread commit log compression
> ---
>
> Key: CASSANDRA-8634
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8634
> Project: Cassandra
>  Issue Type: Improvement
>  Components: Compression
>Reporter: Ariel Weisberg
>Priority: Major
>  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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[jira] [Updated] (CASSANDRA-8634) Multi-thread commit log compression

2015-01-15 Thread Ariel Weisberg (JIRA)

 [ 
https://issues.apache.org/jira/browse/CASSANDRA-8634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Ariel Weisberg updated CASSANDRA-8634:
--
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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