Using cursorMark with '_yz_rk'

Guillaume Boddaert guillaume at lighthouse-analytics.co
Wed Sep 21 10:40:09 EDT 2016


I'm very curious of your cursorMark implementation, I'm in deep need of 
that feature.

 From my experience I wasn't even able to trigger a query with my riak 
version as it was not yet supported by the Solr bundled with it. But I 
might missed a point with that.

I'm using 2.1.2.

Guillaume

On 21/09/2016 03:28, Vipin Sharma wrote:
>
> Hi all,
>
> In our system we have default implementation of querying the data from 
> riak using “pagination”.
>
> For some of the queries, with huge number of resulting records (into 
> the tunes of 10,000+) , it is becoming an issue and hence we wanted to 
> change it to use “cursorMark” as suggested here : 
> https://cwiki.apache.org/confluence/display/solr/Pagination+of+Results
>
> While using cursorMark,
>
> -It asks for unique key in the sort field. We didn’t have a unique key 
> of our own so wanted to use “_yz_rk”  but It gives error mentioned below.
>
> -Query is accepted when sort parameter is changed to use “_yz_id” 
> instead but  It gives redundant / duplicate records. It is probably a 
> known issue as mentioned here 
> <https://docs.basho.com/riak/kv/2.1.4/developing/usage/search/> ( 
> Pagination Warning). Solution recommended is to use { _yz_rt 
> asc, _yz_rb asc, _yz_rk asc } instead but for each of them query is 
> returning the following error :
>
> "error":{"msg":"Cursor functionality requires a sort containing a 
> uniqueKey field tie breaker","code":400}
>
> Can somebody please share some suggestions on this.
>
> Thanks
>
> Vipin
>
>
>
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