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<?xml-stylesheet type="text/xsl" href="https://communities.bentley.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>Does Design History really increase the file size two-fold</title><link>https://communities.bentley.com/products/microstation/w/askinga/634/does-design-history-really-increase-the-file-size-two-fold</link><description>Articles previously found in the &amp;quot;AskInga&amp;quot; Community.</description><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>Does Design History really increase the file size two-fold</title><link>https://communities.bentley.com/products/microstation/w/askinga/634/does-design-history-really-increase-the-file-size-two-fold</link><pubDate>Thu, 10 Jun 2010 14:34:21 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:6c80a0d4-cf3c-41da-b82a-4f84930f3078</guid><dc:creator>Inga Morozoff</dc:creator><comments>https://communities.bentley.com/products/microstation/w/askinga/634/does-design-history-really-increase-the-file-size-two-fold#comments</comments><description>Current Revision posted to [Archived] AskInga Wiki by Inga Morozoff on 6/10/2010 2:34:21 PM&lt;br /&gt;
&lt;p&gt;&lt;a href="/Communities/Other_Communities/AskInga/default.aspx"&gt;&lt;img height="76" width="230" src="/askIngaPics/askingalogo.gif" alt="AskInga logo" border="0" title="AskInga" /&gt;&lt;/a&gt; &lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Original Tip Date: &lt;/strong&gt;&lt;em&gt;Jul 9, 2007&lt;/em&gt; &lt;/p&gt;
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&lt;td align="left" valign="top"&gt;&lt;strong&gt;Does &lt;em&gt;Design History&lt;/em&gt; really increase the file size two-fold?&lt;/strong&gt;&lt;br /&gt;&lt;/td&gt;
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&lt;td align="left" colspan="2" valign="top"&gt;&lt;em&gt;Keith Bentley&lt;/em&gt; provides this excellent explanation:&lt;br /&gt;&lt;br /&gt;Suppose you take a 500K file and enable Design History. Your file will immediately double in size &lt;br /&gt;for the first commit, since your file now will have two copies of every element: the &lt;em&gt;live&lt;/em&gt; state and the &lt;em&gt;history&lt;/em&gt; state. At this point your file is 1MB. Now let&amp;#39;s say you edit the file and modify 10 elements and perform a Design History commit. The new file will be 1MB + 10 elements which might add up to 1.01MB.&lt;br /&gt;&lt;br /&gt;As a general rule of thumb, enabling Design &lt;br /&gt;History will increase your disk size of your DGN&amp;#39;s by a factor of 2.5. Note that 2.0 is a minimum since each element is always stored at least twice; once in the &lt;em&gt;live&lt;/em&gt; state once in the &lt;em&gt;history&lt;/em&gt; state. The 0.5 is an average amount of &amp;quot;churn&amp;quot; over an average project lifecycle. &lt;/td&gt;
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&lt;p&gt;&amp;nbsp; &lt;/p&gt;
&lt;p&gt;AskInga Tip #726 &lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Design History, tip, Askinga&lt;/div&gt;
</description></item><item><title>Does Design History Really Increase The File Size Two-Fold</title><link>https://communities.bentley.com/products/microstation/w/askinga/634/does-design-history-really-increase-the-file-size-two-fold/revision/1</link><pubDate>Tue, 17 Jun 2008 17:59:16 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:6c80a0d4-cf3c-41da-b82a-4f84930f3078</guid><dc:creator>Nicholas Fuschino</dc:creator><comments>https://communities.bentley.com/products/microstation/w/askinga/634/does-design-history-really-increase-the-file-size-two-fold#comments</comments><description>Revision 1 posted to [Archived] AskInga Wiki by Nicholas Fuschino on 6/17/2008 5:59:16 PM&lt;br /&gt;
&lt;p&gt;
&lt;a href="/Communities/Other_Communities/AskInga/default.aspx"&gt;&lt;img src="/askIngaPics/askingalogo.gif" border="0" alt="AskInga logo" title="AskInga" width="230" height="76" /&gt;&lt;/a&gt; 
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&lt;p&gt;
&lt;strong&gt;Original Tip Date: &lt;/strong&gt;&lt;em&gt;Jul 9, 2007&lt;/em&gt;
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			&lt;td align="left" valign="top"&gt;&lt;strong&gt;Does &lt;em&gt;Design History&lt;/em&gt; really increase the file size two-fold?&lt;/strong&gt;&lt;br /&gt;
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			&lt;td align="right" valign="top"&gt;&amp;nbsp;&lt;/td&gt;
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			&lt;td colspan="2" align="left" valign="top"&gt;&lt;em&gt;Keith Bentley&lt;/em&gt; provides this excellent explanation:&lt;br /&gt;
			&lt;br /&gt;
			Suppose you take a 500K file and enable Design History. Your file will immediately double in size &lt;br /&gt;
			for the first commit, since your file now will have two copies of every element: the &lt;em&gt;live&lt;/em&gt; state and the &lt;em&gt;history&lt;/em&gt; state. At this point your file is 1MB. Now let's say you edit the file and modify 10 elements and perform a Design History commit. The new file will be 1MB + 10 elements which might add up to 1.01MB.&lt;br /&gt;
			&lt;br /&gt;
			As a general rule of thumb, enabling Design &lt;br /&gt;
			History will increase your disk size of your DGN's by a factor of 2.5. Note that 2.0 is a minimum since each element is always stored at least twice; once in the &lt;em&gt;live&lt;/em&gt; state once in the &lt;em&gt;history&lt;/em&gt; state. The 0.5 is an average amount of &amp;quot;churn&amp;quot; over an average project lifecycle. &lt;/td&gt;
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&amp;nbsp;
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&lt;p&gt;
AskInga Tip #726 
&lt;/p&gt;
&lt;div style="clear:both;"&gt;&lt;/div&gt;

&lt;div style="font-size: 90%;"&gt;Tags: Askinga, Design History, tip&lt;/div&gt;
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