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https://issues.apache.org/jira/browse/SOLR-5463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845618#comment-13845618
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Steve Rowe commented on SOLR-5463:
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bq.  I think my new favorite is {{cursorMark}} / {{nextCursorMark}}

+1

bq. I suggest {{cursorKey}}.

I like "mark" better than "key", since in addition to conveying that it's a 
sign/symbol for something else (as "key" does), it also has a positional 
meaning.  And  it does both those things without inviting people to use unique 
ids in their place.

> Provide cursor/token based "searchAfter" support that works with arbitrary 
> sorting (ie: "deep paging")
> ------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-5463
>                 URL: https://issues.apache.org/jira/browse/SOLR-5463
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Hoss Man
>            Assignee: Hoss Man
>         Attachments: SOLR-5463__straw_man.patch, SOLR-5463__straw_man.patch, 
> SOLR-5463__straw_man.patch, SOLR-5463__straw_man.patch, 
> SOLR-5463__straw_man.patch, SOLR-5463__straw_man.patch, 
> SOLR-5463__straw_man.patch, SOLR-5463__straw_man.patch, 
> SOLR-5463__straw_man.patch
>
>
> I'd like to revist a solution to the problem of "deep paging" in Solr, 
> leveraging an HTTP based API similar to how IndexSearcher.searchAfter works 
> at the lucene level: require the clients to provide back a token indicating 
> the sort values of the last document seen on the previous "page".  This is 
> similar to the "cursor" model I've seen in several other REST APIs that 
> support "pagnation" over a large sets of results (notable the twitter API and 
> it's "since_id" param) except that we'll want something that works with 
> arbitrary multi-level sort critera that can be either ascending or descending.
> SOLR-1726 laid some initial ground work here and was commited quite a while 
> ago, but the key bit of argument parsing to leverage it was commented out due 
> to some problems (see comments in that issue).  It's also somewhat out of 
> date at this point: at the time it was commited, IndexSearcher only supported 
> searchAfter for simple scores, not arbitrary field sorts; and the params 
> added in SOLR-1726 suffer from this limitation as well.
> ---
> I think it would make sense to start fresh with a new issue with a focus on 
> ensuring that we have deep paging which:
> * supports arbitrary field sorts in addition to sorting by score
> * works in distributed mode



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