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List:       solr-dev
Subject:    Re: Does SOLR-587 (Use Lucene's deleteByQuery) Mean that DUH2's DeleteByQuery Is Now Fast?
From:       "Yonik Seeley" <yonik () apache ! org>
Date:       2008-06-30 19:57:37
Message-ID: c68e39170806301257p4aafd582m1874f8abb05add5d () mail ! gmail ! com
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On Mon, Jun 30, 2008 at 3:43 PM, Chris Harris <ryguasu@gmail.com> wrote:
> The wiki (http://wiki.apache.org/solr/UpdateXmlMessages) explains that
> "delete by id is much more efficient than delete by query". Does this
> patch mean this is no longer true?

Pretty much.

> That is, is delete by query now
> basically as fast as delete by ID?

Almost.  There will still be a little overhead (query parsing,
rewriting, etc), but the huge expense of switching from writer to
reader for deleteByQuery is now gone.

-Yonik
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