AFAIK, Since hadoop doesn't provide file-append function, Current Hbase have a problem of data loss when Hbase crashed.
BTW, We also think about CF for example - http://wiki.apache.org/hama/TraditionalCollaborativeFiltering If you have some advanced idea, please let me know. Regards, Edward On Mon, Sep 1, 2008 at 9:16 AM, Sean Owen <[EMAIL PROTECTED]> wrote: > I looked at this some more and I am not sure HBase will work out... it > doesn't support anything like a query it seems. Really is just a > distributed sorted map, which is a bit less than BigTable. Not even a > "how many rows are in the table method" it seems. > > On Fri, Aug 29, 2008 at 6:20 PM, Sean Owen <[EMAIL PROTECTED]> wrote: >> Nah, pretty much random -- well, most of the queries are like "show me >> all ratings for item ID x" or "... from user ID x" though some are a >> bit more complex. I think you can get 90% of what's needed from two >> HBase tables, one keyed by user and the other by item, though you end >> up duplicating a lot of data. Perhaps there are answers to that, and >> to the other sorts of queries that are needed. It could be that it's >> just not a fit but seems like there might be some way to use it >> effectively for this purpose. > -- Best regards, Edward J. Yoon [EMAIL PROTECTED] http://blog.udanax.org
