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https://issues.apache.org/jira/browse/MAHOUT-202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468519#comment-13468519
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David Arthur commented on MAHOUT-202:
-------------------------------------
For full disclosure, here's the script I used to generate the above benchmark:
{code:java}
long t1, t2;
int total;
log.info("Iterate through all users");
LongPrimitiveIterator userIDs = model.getUserIDs();
total = 0;
t1 = System.currentTimeMillis();
while(userIDs.hasNext()) {
long user = userIDs.nextLong();
PreferenceArray prefs = model.getPreferencesFromUser(user);
total += prefs.length();
}
t2 = System.currentTimeMillis();
log.info("Iterated through all users in: {} ms", (t2-t1));
log.info("Counted {} ratings", total);
log.info("Total number of users: " + model.getNumUsers());
log.info("Iterate through all items");
LongPrimitiveIterator itemIDs = model.getItemIDs();
total = 0;
t1 = System.currentTimeMillis();
while(itemIDs.hasNext()) {
long item = itemIDs.nextLong();
PreferenceArray prefs = model.getPreferencesForItem(item);
total += prefs.length();
}
t2 = System.currentTimeMillis();
log.info("Iterated through all items in: {} ms", (t2-t1));
log.info("Counted {} ratings", total);
log.info("Total number of items: " + model.getNumItems());
{code}
> Make Taste support HBase as data store
> --------------------------------------
>
> Key: MAHOUT-202
> URL: https://issues.apache.org/jira/browse/MAHOUT-202
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.3
> Reporter: Jeff Zhang
> Priority: Minor
> Attachments: MAHOUT-202.patch
>
>
> I'd like to add hbase as another data store option for taste.
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