it's depend on the orginal column number in oracle, and the data length in the oracle. the key in hbase include each row key+column name+timestape+TTL. so if you have many column and the actually column value is very small, then you the hbase table is much bigger then table in oracle. So be sure use compress in hbase.
I had a test table in oracle is 3G, after import to hbase, it's 28G. with gz compress it about 4G, with lzo compress it's about 7G. Thanks Zhang, Gui 2011/8/6 Daniel,Wu <[email protected]> > if a table in oracle has a size of 100T, and then put it into hbase, how > much space normally will hbase take? >
