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	<title>Comments for TheOnly92</title>
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	<link>http://theonly92.com</link>
	<description>Just another WordPress weblog</description>
	<lastBuildDate>Tue, 10 May 2011 13:26:03 +0000</lastBuildDate>
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		<title>Comment on 踏上 NoSQL 之路 by toozoofoo</title>
		<link>http://theonly92.com/2011/05/%e8%b8%8f%e4%b8%8a-nosql-%e4%b9%8b%e8%b7%af/comment-page-1/#comment-81</link>
		<dc:creator>toozoofoo</dc:creator>
		<pubDate>Tue, 10 May 2011 13:26:03 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=543#comment-81</guid>
		<description>&lt;blockquote&gt;
&lt;a href=&quot;#comment-80&quot; rel=&quot;nofollow&quot;&gt;
&lt;strong&gt;&lt;em&gt;TheOnly92:&lt;/em&gt;&lt;/strong&gt;
&lt;/a&gt;
 &#160;嗯，原来还有这样的事情啊。但是你给我的链接中下面也提到 reference 很慢，效果貌似也不是很理想。那不是变成完全没有利用的原因了吗？
&lt;/blockquote&gt;


这个开销是必需的，就像关系数据库一样。用Embed还是ref...各有优缺点，取和舍的问题。</description>
		<content:encoded><![CDATA[<blockquote><p>
<a href="#comment-80" rel="nofollow"><br />
<strong><em>TheOnly92:</em></strong><br />
</a><br />
 &nbsp;嗯，原来还有这样的事情啊。但是你给我的链接中下面也提到 reference 很慢，效果貌似也不是很理想。那不是变成完全没有利用的原因了吗？
</p></blockquote>
<p>这个开销是必需的，就像关系数据库一样。用Embed还是ref&#8230;各有优缺点，取和舍的问题。</p>
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		<title>Comment on 踏上 NoSQL 之路 by TheOnly92</title>
		<link>http://theonly92.com/2011/05/%e8%b8%8f%e4%b8%8a-nosql-%e4%b9%8b%e8%b7%af/comment-page-1/#comment-80</link>
		<dc:creator>TheOnly92</dc:creator>
		<pubDate>Tue, 10 May 2011 13:07:34 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=543#comment-80</guid>
		<description> 嗯，原来还有这样的事情啊。但是你给我的链接中下面也提到 reference 很慢，效果貌似也不是很理想。那不是变成完全没有利用的原因了吗？</description>
		<content:encoded><![CDATA[<p> 嗯，原来还有这样的事情啊。但是你给我的链接中下面也提到 reference 很慢，效果貌似也不是很理想。那不是变成完全没有利用的原因了吗？</p>
]]></content:encoded>
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	<item>
		<title>Comment on 踏上 NoSQL 之路 by toozoofoo</title>
		<link>http://theonly92.com/2011/05/%e8%b8%8f%e4%b8%8a-nosql-%e4%b9%8b%e8%b7%af/comment-page-1/#comment-79</link>
		<dc:creator>toozoofoo</dc:creator>
		<pubDate>Tue, 10 May 2011 13:02:40 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=543#comment-79</guid>
		<description>&gt; 数据库相关资料都必须放在同一个 Document 中，举例来说就是博客中 Article, Comments 和 Author 都必须在同一个 Document
mongodb的Document概念只是一个存储单元的实例，相当于RMDBS的一条记录，只不过是可以嵌套的复杂结构，而Collection对应的是RMDBS的Table。Article,Comment,Author可以放在同一个Document里面（Embed），也可以放在各自的Collection的Document里，甚至是不同db的Collection的Document（dbref），关联的时候用dbref来或者是你自定义的关联字段，详情可以看这里http://www.mongodb.org/display/DOCS/Schema+Design</description>
		<content:encoded><![CDATA[<p>&gt; 数据库相关资料都必须放在同一个 Document 中，举例来说就是博客中 Article, Comments 和 Author 都必须在同一个 Document<br />
mongodb的Document概念只是一个存储单元的实例，相当于RMDBS的一条记录，只不过是可以嵌套的复杂结构，而Collection对应的是RMDBS的Table。Article,Comment,Author可以放在同一个Document里面（Embed），也可以放在各自的Collection的Document里，甚至是不同db的Collection的Document（dbref），关联的时候用dbref来或者是你自定义的关联字段，详情可以看这里http://www.mongodb.org/display/DOCS/Schema+Design</p>
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	</item>
	<item>
		<title>Comment on 为何我们无法超越光速？ by OMG</title>
		<link>http://theonly92.com/2011/02/why-cant-we-travel-faster-than-light/comment-page-1/#comment-76</link>
		<dc:creator>OMG</dc:creator>
		<pubDate>Tue, 22 Feb 2011 12:05:41 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=489#comment-76</guid>
		<description>PRO!</description>
		<content:encoded><![CDATA[<p>PRO!</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on 无题 by Neda Cayne</title>
		<link>http://theonly92.com/2011/01/%e6%97%a0%e9%a2%98/comment-page-1/#comment-74</link>
		<dc:creator>Neda Cayne</dc:creator>
		<pubDate>Fri, 07 Jan 2011 08:46:17 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=459#comment-74</guid>
		<description>good day. This really is a great post. I certainly would love to hear much more from you. Bookmarked. Thnx</description>
		<content:encoded><![CDATA[<p>good day. This really is a great post. I certainly would love to hear much more from you. Bookmarked. Thnx</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Pure Reader by jun hui</title>
		<link>http://theonly92.com/2010/12/pure-reader/comment-page-1/#comment-71</link>
		<dc:creator>jun hui</dc:creator>
		<pubDate>Tue, 07 Dec 2010 14:09:49 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=455#comment-71</guid>
		<description>thk u man!! love it</description>
		<content:encoded><![CDATA[<p>thk u man!! love it</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Programming is an art by 扫黄打非</title>
		<link>http://theonly92.com/2010/09/programming-is-an-art/comment-page-1/#comment-48</link>
		<dc:creator>扫黄打非</dc:creator>
		<pubDate>Sat, 02 Oct 2010 06:09:54 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=428#comment-48</guid>
		<description>关注博主，写的不错</description>
		<content:encoded><![CDATA[<p>关注博主，写的不错</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Getting Ikariem Done by ntaq</title>
		<link>http://theonly92.com/2010/08/getting-ikariem-done/comment-page-1/#comment-41</link>
		<dc:creator>ntaq</dc:creator>
		<pubDate>Wed, 04 Aug 2010 00:59:10 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=392#comment-41</guid>
		<description>低调的飞过</description>
		<content:encoded><![CDATA[<p>低调的飞过</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Chances by coozd</title>
		<link>http://theonly92.com/2010/07/chances/comment-page-1/#comment-40</link>
		<dc:creator>coozd</dc:creator>
		<pubDate>Fri, 16 Jul 2010 23:25:37 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=386#comment-40</guid>
		<description>留个脚印</description>
		<content:encoded><![CDATA[<p>留个脚印</p>
]]></content:encoded>
	</item>
	<item>
		<title>Comment on Domains by 91526</title>
		<link>http://theonly92.com/2010/07/domains/comment-page-1/#comment-39</link>
		<dc:creator>91526</dc:creator>
		<pubDate>Tue, 13 Jul 2010 11:51:48 +0000</pubDate>
		<guid isPermaLink="false">http://theonly92.com/?p=379#comment-39</guid>
		<description>管用！</description>
		<content:encoded><![CDATA[<p>管用！</p>
]]></content:encoded>
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