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https://issues.apache.org/jira/browse/SOLR-1426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755077#action_12755077
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Abdul Chaudhry commented on SOLR-1426:
--------------------------------------

The perpetual option only makes sense for one command; that is the delta-import 
command. I could not see a compelling use case for using perpetual with any 
other command.

The abort should stop any in-flight delta-import which is the current behaviour 
with the patch.

The sleep interval should be set using something like "perpetual.delay" and 
default to a reasonable value such as 3 secs.


> Allow delta-import to run continously until aborted
> ---------------------------------------------------
>
>                 Key: SOLR-1426
>                 URL: https://issues.apache.org/jira/browse/SOLR-1426
>             Project: Solr
>          Issue Type: Improvement
>          Components: contrib - DataImportHandler
>    Affects Versions: 1.4
>            Reporter: Abdul Chaudhry
>            Assignee: Noble Paul
>             Fix For: 1.5
>
>         Attachments: delta-import-perpetual.patch
>
>
> Modify the delta-import so that it takes a perpetual flag that makes it run 
> continuously until its aborted.
> http://localhost:8985/solr/select/?command=delta-import&clean=false&qt=/dataimport&commit=true&perpetual=true
> perpetual means the delta import will keep running and pause for a few 
> seconds when running queries.
> The only way to stop delta import will be to explicitly issue an abort like 
> so:-
> http://localhost:8985/solr/tickets/select/?command=abort

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