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From aaron morton <aa...@thelastpickle.com>
Subject Re: Possibility of going OOM using get_count
Date Mon, 19 Sep 2011 09:25:51 GMT
get_count() supports the same predicate as get_slice. So you can implement the paging yourself.


Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com

On 19/09/2011, at 8:45 PM, Tharindu Mathew wrote:

> 
> 
> On Mon, Sep 19, 2011 at 12:40 PM, Benoit Perroud <benoit@noisette.ch> wrote:
> The workaround for 0.7 is calling get_slice and count on client side.
> It's heavier, sure, but you will then be able to set start column
> accordingly.
> 
> I was afraid of that :(
> 
> Will follow that method. Thanks. 
> 
> 
> 
> 2011/9/19 Tharindu Mathew <mccloud35@gmail.com>:
> > Thanks Aaron and Jake for the replies.
> > Any chance of a possible workaround to use for Cassandra 0.7?
> >
> > On Mon, Sep 19, 2011 at 3:48 AM, aaron morton <aaron@thelastpickle.com>
> > wrote:
> >>
> >> Cool
> >> Thanks, A
> >> -----------------
> >> Aaron Morton
> >> Freelance Cassandra Developer
> >> @aaronmorton
> >> http://www.thelastpickle.com
> >> On 19/09/2011, at 9:55 AM, Jake Luciani wrote:
> >>
> >> This is fixed in 1.0
> >> https://issues.apache.org/jira/browse/CASSANDRA-2894
> >>
> >> On Sun, Sep 18, 2011 at 2:16 PM, Tharindu Mathew <mccloud35@gmail.com>
> >> wrote:
> >>>
> >>> Hi everyone,
> >>> I noticed this line in the API docs,
> >>>
> >>> The method is not O(1). It takes all the columns from disk to calculate
> >>> the answer. The only benefit of the method is that you do not need to pull
> >>> all the columns over Thrift interface to count them.
> >>>
> >>> Does this mean if a row has a large number of columns calling this method
> >>> might make it go OOM?
> >>> Thanks in advance.
> >>> --
> >>> Regards,
> >>>
> >>> Tharindu
> >>> blog: http://mackiemathew.com/
> >>
> >>
> >>
> >> --
> >> http://twitter.com/tjake
> >>
> >
> >
> >
> > --
> > Regards,
> >
> > Tharindu
> > blog: http://mackiemathew.com/
> >
> 
> 
> 
> -- 
> Regards,
> 
> Tharindu
> 
> blog: http://mackiemathew.com/
> 


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