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From "Stephen Allen (JIRA)" <>
Subject [jira] [Updated] (JENA-44) Support external sorting of bindings in ARQ
Date Mon, 15 Aug 2011 19:37:27 GMT


Stephen Allen updated JENA-44:

    Attachment: JENA-44-Depends-on-JENA-99-r1157891.patch

Attached a patch using the implementation in JENA-99.

> Support external sorting of bindings in ARQ
> -------------------------------------------
>                 Key: JENA-44
>                 URL:
>             Project: Jena
>          Issue Type: New Feature
>          Components: ARQ
>            Reporter: Sam Tunnicliffe
>            Assignee: Paolo Castagna
>            Priority: Minor
>         Attachments: JENA-44-0.patch, JENA-44-Depends-on-JENA-99-r1157891.patch, JENA-44_ARQ_r1156212.patch,
JENA-44_ARQ_r8531.patch, JENA-44_ARQ_r8724.patch
> In QueryIterSort, the sorting of the contents of an Iterator<Binding> is done in
memory, using Arrays.sort. This can be problematic where the set to be sorted is large. A
possible solution could be to use an external, disk-backed algorithm. A hybrid approach may
be better, whereby we attempt the in-memory sort, but when the number of bindings encountered
goes over a certain number, resort to the disk-backed variant.

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