Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Plain View
Accumulo >> mail # user >> row count


+
Venkat 2013-04-17, 01:33
+
Josh Elser 2013-04-17, 01:52
+
Venkat 2013-04-17, 02:46
+
David Medinets 2013-04-17, 12:17
+
Venkat 2013-04-18, 02:48
+
Keith Turner 2013-04-17, 14:42
+
Venkat 2013-04-18, 02:40
Could you layer a scan time SummingCombiner on top of the
FirstEntryInRowIterator?
I don't know how to actually do this, but instinct says it should work and
significantly reduce the traffic back to the client.
On Wed, Apr 17, 2013 at 10:42 AM, Keith Turner <[EMAIL PROTECTED]> wrote:

> On Tue, Apr 16, 2013 at 9:33 PM, Venkat <[EMAIL PROTECTED]> wrote:
> > I am sure this question has been asked several times but I could not get
> to
> > the answer using usual searches - which iterator is the right one to
> count
> > the number of rows for a given value or a pattern of value ?
>
> Take a look at org.apache.accumulo.core.iterators.FirstEntryInRowIterator.
>  Does anyone know why this is not in the user iterator package?  Is
> there an issue with it?  This will bring back the first key/value for
> each row, then you could count those on the client side.   This will
> work for a range.  For a pattern, David's suggestion of the regex
> filter may be useful.   You could also look in the
> org.apache.accumulo.core.iterators.user.RowFilter.
>
> You could use FirstEntryInRowIterator and RegEx or RowFilter, but you
> would have to be careful about the order of the iterators.
>
> >
> > Venkat.
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB