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https://issues.apache.org/jira/browse/MAHOUT-667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13019257#comment-13019257
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Chris Newell commented on MAHOUT-667:
-------------------------------------
Initial suggestion for discussion below. It feels like re-inventing the wheel
so if I've missed some obvious solution elsewhere please let me know.
{code}
/**
* Provides a persistent store for a resource.
*/
public interface PersistenceStrategy {
/**
* @return an InputStream from which a resource can be read.
* @throws IOException
*/
public InputStream getInputStream() throws IOException;
/**
* @return an OutputStream to which a resource can be written.
* @throws IOException
*/
public OutputStream getOutputStream() throws IOException;
/**
* @return true if the persistent store contains a resource; false otherwise.
*/
public boolean exists();
/**
* Clears the persistent store.
* @return true if and only if the store is successfully cleared; false
otherwise
*/
public boolean delete();
}
{code}
> Persistent storage of factorizations in SVDRecommender
> ------------------------------------------------------
>
> Key: MAHOUT-667
> URL: https://issues.apache.org/jira/browse/MAHOUT-667
> Project: Mahout
> Issue Type: Improvement
> Components: Collaborative Filtering
> Affects Versions: 0.5
> Reporter: Chris Newell
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 0.4
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> As discussed previously (https://issues.apache.org/jira/browse/MAHOUT-640) it
> would be beneficial to provide a persistent storage mechanism for
> factorizations created by SVDRecommender (in package
> org.apache.mahout.cf.taste.impl.recommender.svd) as these can be time
> consuming to produce. It would also allow factorizations to be computed on
> one machine then distributed to other machines providing predictions,
> improving efficiency and scalability.
> Having a "persistence strategy" interface has been suggested that could be
> implemented as required. I'll try to post a outline proposal for discussion
> purposes in the next few days but any comments or suggestions would be very
> welcome.
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