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From "Amandeep Khurana (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2433) RDF and SPARQL with HBase - Features and design specs
Date Tue, 13 Apr 2010 05:50:49 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12856310#action_12856310
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Amandeep Khurana commented on HBASE-2433:
-----------------------------------------

We should be able to answer small queries with low latency by using the right kind of indexing.
Here are some papers that do it:
http://people.csail.mit.edu/tdanford/6830papers/weiss-hexastore.pdf
http://portal.acm.org/citation.cfm?id=1114857

However, they do everything in memory. We can store these indexes in HBase and allow for fast
querying. However, we cant guarantee as good performance as these papers do. It'll still be
much better than a MR job though.

Batch processes can also use these indexes for getting results out faster. This is yet to
be explored.

> RDF and SPARQL with HBase - Features and design specs
> -----------------------------------------------------
>
>                 Key: HBASE-2433
>                 URL: https://issues.apache.org/jira/browse/HBASE-2433
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: contrib
>            Reporter: Amandeep Khurana
>            Assignee: Amandeep Khurana
>
> This is for scoping out the feature set and the design specifications for the RDF store
over HBase and the query capability it will have. I'll be posting some initial ideas soon.
> The key goals for this layer are:
> 1. Scalability
> 2. Support for interactive queries (this one seems to be the biggest challenge)
> We would need to define the subset of queries we will support. We'll probably begin with
SELECT queries.

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