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From "Paolo Castagna (JIRA)" <>
Subject [jira] [Updated] (JENA-45) Spill to disk SPARQL Update
Date Mon, 05 Sep 2011 12:55:09 GMT


Paolo Castagna updated JENA-45:

    Attachment: JENA-45_ARQ_r1165123.patch

UpdateEngineWorker now uses a Symbol (i.e. spillOnDiskUpdateThreshold) to get the threshold
to decide when to spill on disk. The value defaults to Integer.MAX_VALUE (i.e. feature is
off by default).

Anything left on this one?

> Spill to disk SPARQL Update
> ---------------------------
>                 Key: JENA-45
>                 URL:
>             Project: Jena
>          Issue Type: New Feature
>          Components: ARQ
>            Reporter: Stephen Allen
>            Assignee: Paolo Castagna
>         Attachments: ARQ-Disk-Backed-Updates-r8504.patch, ARQ-Disk-Backed-Updates-r8657.patch,
JENA-45-Depends-on-JENA-99-r1157891.patch, JENA-45-Disk-Backed-Updates-r1156193.patch, JENA-45_ARQ_r1165123.patch
> Attached is a patch that implements a spill-to-disk container for performing SPARQL Update
commands.  It utilizes a DeferredFileQueue that can serialize/deserialize Bindings, Quads,
and Triples.  Also included are some unit tests.
> Items yet to be addressed:
> 1) Read the threshold and temporary file location from a config file
> 2) Examine compression of the bindings/quads/triples to see if we can improve I/O speed
> [1]$2e5c5bc0$8b151340$@com%3E

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