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HBase >> mail # user >> No of rows


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Re: No of rows
On Wed, Sep 12, 2012 at 4:48 PM, lars hofhansl <[EMAIL PROTECTED]> wrote:

> No. By default each call to ClientScanner.next(...) incurs an RPC call to
> the HBase server, which is why it is important to enable scanner caching
> (as opposed to batching) if you expect to scan many rows.
> By default scanner caching is set to 1.
>
Thanks! If caching is set > 1 then is there a way to limit no of rows
that's fetched from the server?

>
>
> ________________________________
>  From: Mohit Anchlia <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Sent: Wednesday, September 12, 2012 4:29 PM
> Subject: Re: No of rows
>
> But when resultscanner executes wouldn't it already query the servers for
> all the rows matching the startkey? I am tyring to avoid reading all the
> blocks from the file system that matches the keys.
>
> On Wed, Sep 12, 2012 at 3:59 PM, Doug Meil <[EMAIL PROTECTED]
> >wrote:
>
> >
> > Hi there,
> >
> > If you're talking about stopping a scan after X rows (as opposed to the
> > batching), but break out of the ResultScanner loop after X rows.
> >
> > http://hbase.apache.org/book.html#data_model_operations
> >
> > You can either add a ColumnFamily to a scan, or add specific attributes
> > (I.e., "cf:column") to a scan.
> >
> >
> >
> >
> > On 9/12/12 6:50 PM, "Mohit Anchlia" <[EMAIL PROTECTED]> wrote:
> >
> > >I am using client 0.90.5 jar
> > >
> > >Is there a way to limit how many rows can be fetched in one scan call?
> > >
> > >Similarly is there something for colums?
> >
> >
> >
>
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