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https://issues.apache.org/jira/browse/CASSANDRA-13474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15983960#comment-15983960
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Jeremiah Jordan edited comment on CASSANDRA-13474 at 4/26/17 1:21 AM:
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The main comment I have is that this needs to be implemented along with an new 
engine implementation to go with it. Without a 2nd storage engine 
implementation to go with we can't be sure our plugin API is at a high enough 
level.


was (Author: jjordan):
The main comment I have is that this needs to be implemented in with an new 
engine implementation to go with it. Without a 2nd storage engine 
implementation to go with we can't be sure our plugin API is at a high enough 
level.

> Cassandra pluggable storage engine
> ----------------------------------
>
>                 Key: CASSANDRA-13474
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13474
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Dikang Gu
>
> We did some experiment to switch Cassandra's storage engine to RocksDB.
> In the experiment, I built a prototype to integrate Cassandra 3.0.12 and 
> RocksDB on single column (key-value) use case, shadowed one of our production 
> use case, and saw about 4-6X P99 read latency drop during peak time, compared 
> to 3.0.12. Also, the P99 latency became more predictable as well.
> Here is detailed note with more metrics: 
> https://docs.google.com/document/d/1Ztqcu8Jzh4USKoWBgDJQw82DBurQmsV-PmfiJYvu_Dc/edit?usp=sharing
>  
> I think the biggest latency win comes from we get rid of most Java garbages 
> created by current read/write path and compactions, which reduces the JVM 
> overhead and makes the latency to be more predictable.
> We are very excited about the potential performance gain. As the next step, I 
> propose to make the Cassandra storage engine to be pluggable (like Mysql and 
> MongoDB), and we are very interested in providing RocksDB as one storage 
> option with more predictable performance, together with community. 



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