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https://issues.apache.org/jira/browse/DERBY-7073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17077116#comment-17077116
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liaochuntao commented on DERBY-7073:
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We would like to say that we provide Derby with a one-master-multislave
capability based on raft, and we would like to discuss with you whether this
scenario is acceptable to Derby, and if so, we would like to discuss it with
you further
> Can we override the underlying storage to implement a distributed Derby using
> Derby's subsubprotocol mechanism
> --------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-7073
> URL: https://issues.apache.org/jira/browse/DERBY-7073
> Project: Derby
> Issue Type: Task
> Reporter: liaochuntao
> Priority: Trivial
>
> /**
> * derby.subSubProtocol.xxx
> *<p>
> *
> * A new subsubprotocol can be defined by specifying the class that handles
> storage for the
> * subsubprotocol by implementing the
> * org.apache.derby.io.StorageFactory StorageFactory or
> * org.apache.derby.io.WritableStorageFactory WritableStorageFactory
> interface. This
> * is done using a property named db2j.subsubprotocol.<i>xxx</i> where
> <i>xxx</i> is the subsubprotocol name.
> * Subsubprotocol names are case sensitive and must be at least 3 characters
> in length.
> *<p>
> *
> * For instance:
> *<br>
> * derby.subSubProtocol.mem=com.mycompany.MemStore
> *<br>
> * defines the "mem" subsubprotocol with class com.mycompany.MemStore as its
> StorageFactory implementation.
> * A database implemented using this subsubprotocol can be opened with the
> URL "jdbc:derby:mem:myDatabase".
> *<p>
> *
> * Subsubprotocols "directory", "classpath", "jar", "http", and "https" are
> built in and may not be overridden.
> */
>
> Can we take advantage of this capability to implement a distributed
> contribution storage, with Derby acting as the computing layer and multiple
> Derby nodes contributing a storage layer, and realize Ploar DB similar to ali
> cloud, namely a distributed Derby
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