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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-17244] Unknown storage engine: wiredtiger</title>
                <link>https://jira.mongodb.org/browse/SERVER-17244</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I&apos;ve installed MongoDB V3 64bit RC8 and am getting the following error&lt;/p&gt;

&lt;p&gt;&quot;2015-02-11T07:25:20.865+1100 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; exception in initAndListen: 18656 Cannot start server with an unknown storage engine: wiredtiger,&lt;br/&gt;
terminating&quot;&lt;/p&gt;

&lt;p&gt;for the cmdline:&lt;br/&gt;
&quot;c:\mongodb-win32-x86_64-2008plus-3.0.0-rc8\bin\mongod.exe --journal --dbpath c:/webapps/database --storageEngine wiredtiger&quot;&lt;/p&gt;</description>
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        <key id="183586">SERVER-17244</key>
            <summary>Unknown storage engine: wiredtiger</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="nevf">Neville Franks</reporter>
                        <labels>
                    </labels>
                <created>Tue, 10 Feb 2015 20:43:41 +0000</created>
                <updated>Thu, 12 Feb 2015 23:49:45 +0000</updated>
                            <resolved>Tue, 10 Feb 2015 20:47:22 +0000</resolved>
                                    <version>3.0.0-rc8</version>
                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="828402" author="ramon.fernandez" created="Thu, 12 Feb 2015 23:49:45 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=nevf&quot; class=&quot;user-hover&quot; rel=&quot;nevf&quot;&gt;nevf&lt;/a&gt;, can you please send the link for the white paper you mention? That will help routing the issue to the right people.&lt;/p&gt;

&lt;p&gt;As for your question, one can&apos;t &quot;convert&quot; a MMAPv1 instance to a WiredTiger one. Stand-alone instances are &quot;converted&quot; via dump and restore, and replica sets can be upgraded one node at a time. For more information please see the &lt;a href=&quot;http://docs.mongodb.org/v3.0/release-notes/3.0/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;development release notes for 3.0.0&lt;/a&gt;, in particular the &lt;a href=&quot;http://docs.mongodb.org/v3.0/release-notes/3.0-upgrade/#upgrade-recommendations-and-checklists&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;upgrade recommendations and checklists&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="826218" author="nevf" created="Tue, 10 Feb 2015 20:52:49 +0000"  >&lt;p&gt;Ramon, thanks for the quick response.  I copied this from the MongoDB Whitepaper PDF I downloaded. It would be prudent to update that document.&lt;/p&gt;

&lt;p&gt;Can you point me at Docs for converting a MMAP DB to WiredTiger? Now I get:&lt;/p&gt;

&lt;p&gt;&quot;2015-02-11T07:51:08.249+1100 I STORAGE  &lt;span class=&quot;error&quot;&gt;&amp;#91;initandlisten&amp;#93;&lt;/span&gt; exception in initAndListen: 28574 Cannot start server. Detected data files in c:/webapps/database&lt;br/&gt;
created by storage engine &apos;mmapv1&apos;. The configured storage engine is &apos;wiredTiger&apos;., terminating&quot;&lt;/p&gt;</comment>
                            <comment id="826213" author="ramon.fernandez" created="Tue, 10 Feb 2015 20:46:41 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=nevf&quot; class=&quot;user-hover&quot; rel=&quot;nevf&quot;&gt;nevf&lt;/a&gt;, starting with 3.0.0-rc6 we normalized the storage engine name to &quot;wiredTiger&quot;, please fix the capitalization in your command line. See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16811&quot; title=&quot;Only register wiredTiger factory once&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16811&quot;&gt;&lt;del&gt;SERVER-16811&lt;/del&gt;&lt;/a&gt; for more details.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n.&lt;/p&gt;</comment>
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