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From "Chris A. Mattmann (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OODT-216) Improve speed of pagination in all File Manager Catalogs by using lastIDs rather than scrollable cursors
Date Thu, 30 Aug 2012 15:41:08 GMT

     [ https://issues.apache.org/jira/browse/OODT-216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris A. Mattmann updated OODT-216:
-----------------------------------

    Summary: Improve speed of pagination in all File Manager Catalogs by using lastIDs rather
than scrollable cursors  (was: Improve speed of pagination in DataSourceCatalog by using lastIDs
rather than scrollable cursors)
    
> Improve speed of pagination in all File Manager Catalogs by using lastIDs rather than
scrollable cursors
> --------------------------------------------------------------------------------------------------------
>
>                 Key: OODT-216
>                 URL: https://issues.apache.org/jira/browse/OODT-216
>             Project: OODT
>          Issue Type: Improvement
>          Components: file manager
>         Environment: from JPL's internal JIRA
>            Reporter: Chris A. Mattmann
>            Assignee: Chris A. Mattmann
>             Fix For: 0.5
>
>
> Currently, the filemgr's DataSourceCatalog leverages scrollable record cursor result
sets to page over the returned results from an underlying JDBC database. With many records
to page over (on the orders of 100s of 1000s), this operation is somewhat slow. I think that
the speed of the operation could be improved using a filter criteria of e.g., taking the last
ID of an ordered product list, and then using that as a filter criteria to define the starting
point for paging, not bothering with scrollable cursors.
> This patch will provide such a capability as a configurable option for the DataSourceCatalog.

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