You can always add a PageFilter to your Scan instance to achieve this: http://hadoop.apache.org/hbase/docs/r0.20.3/api/org/apache/hadoop/hbase/filter/PageFilter.html
Just be aware that you should still count on the client side if you want to strictly limit to a given size. Since the filter is applied independently on each regionserver, the client can still receive back more than the page size # of items. --gh On Tue, May 4, 2010 at 12:02 PM, TuX RaceR <tuxrace...@gmail.com> wrote: > Hi Hbase users, > > question related to the previous one, if we want to limit the amount of > data retrieved by a a scanner, can we tell to not scan after a number of > rows is reached? > If I look at another KV store (cassandra) the equivalent of the scan API > uses there a > > > KeyRange > > object, see > http://wiki.apache.org/cassandra/API > > *Attribute* > > > > *Type* > > > > *Default* > > > > *Required* > > > > *Description* > > start_key > > > > string > > > > n/a > > > > N > > > > The first key in the inclusive KeyRange. > > end_key > > > > string > > > > n/a > > > > N > > > > The last key in the inclusive KeyRange. > > start_token > > > > string > > > > n/a > > > > N > > > > The first token in the exclusive KeyRange. > > end_token > > > > string > > > > n/a > > > > N > > > > The last token in the exclusive KeyRange. > > count > > > > i32 > > > > 100 > > > > Y > > > > The total number of keys to permit in the KeyRange. > > > Would it be useful (performance wise) to have a 'count' parameter > too, or would it be useless as equivalent to end the scan loop > application side, when the desired number of row is reached? > > > > Thanks > > > TuX > > >
