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From "Dikang Gu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-13475) First version of pluggable storage engine API.
Date Thu, 19 Oct 2017 06:32:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-13475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16210649#comment-16210649
] 

Dikang Gu commented on CASSANDRA-13475:
---------------------------------------

[~bdeggleston], [~spodxx@gmail.com], this little patch shows how read/write paths and streaming
work with the storage engine api, https://github.com/DikangGu/cassandra/commit/3238dfbd8f4abfa2d95d5343edf07985fb732bd1.
The comment out part should be moved to a CQLEngine in the future.

For streaming, I think the rocksdb streaming impl gives good example about how a new storage
engine should implement the streaming flow, https://github.com/Instagram/cassandra/tree/rocks_3.0/src/java/org/apache/cassandra/rocksdb/streaming.
Most of the logic are implemented within the storage engine, there is very little changes
outside the engine.



> First version of pluggable storage engine API.
> ----------------------------------------------
>
>                 Key: CASSANDRA-13475
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13475
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Dikang Gu
>            Assignee: Dikang Gu
>
> In order to support pluggable storage engine, we need to define a unified interface/API,
which can allow us to plug in different storage engines for different requirements. 
> In very high level, the storage engine interface should include APIs to:
> 1. Apply update into the engine.
> 2. Query data from the engine.
> 3. Stream data in/out to/from the engine.
> 4. Table operations, like create/drop/truncate a table, etc.
> 5. Various stats about the engine.
> I create this ticket to start the discussions about the interface.



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