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From stack <st...@duboce.net>
Subject Re: Does HBase have a index?
Date Thu, 06 Mar 2008 17:28:07 GMT

FYI, there is now a hbase mailing list: See 
http://hadoop.apache.org/hbase/mailing_lists.html#Developers. Your 
questions (and Ma's on 'connection to HBase using HTable') would sit 
better there.


Bin YANG wrote:
> Dear colleagues,
> I have a questions on HBase's index implementation.
> How does the HBase find the data according to a row key? Use a index
> like database, or use a hash function?
> I suppose that a hash function which hash row key to physical address
> is more efficient.
> As we know, a big table in HBase is stored as several Small tables,
> each table stores attributes in a column family.
> So that, each row may be stored in several small tables.
> Does a hash function hash row key to many physical address? Each
> physical address correspond to a small table which contains the row
> key?
> Does anybody have idea on how to create a index on other attribute?
> Best,
> Bin YANG

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