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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-15986] Starting with different storage engines in the same dbpath should error/warn</title>
                <link>https://jira.mongodb.org/browse/SERVER-15986</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If no error is generated then it is easy to accidentally change the storage option and think your data has disappeared, or have extra and unused files.&lt;/p&gt;

&lt;p&gt;This can be done by storing a metadata file about what storage engine was used to create the persistent storage so that we can detect if an attempt is used to use a different storage engine after that.&lt;/p&gt;</description>
                <environment></environment>
        <key id="167654">SERVER-15986</key>
            <summary>Starting with different storage engines in the same dbpath should error/warn</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                    </labels>
                <created>Thu, 6 Nov 2014 12:41:50 +0000</created>
                <updated>Tue, 27 Oct 2015 14:12:18 +0000</updated>
                            <resolved>Mon, 24 Nov 2014 21:42:02 +0000</resolved>
                                    <version>2.8.0-rc0</version>
                                    <fixVersion>2.6.6</fixVersion>
                    <fixVersion>2.8.0-rc2</fixVersion>
                                    <component>Storage</component>
                    <component>Usability</component>
                                        <votes>2</votes>
                                    <watches>14</watches>
                                                                                                                <comments>
                            <comment id="771735" author="xgen-internal-githook" created="Mon, 24 Nov 2014 21:41:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16283&quot; title=&quot;Can&amp;#39;t start new wiredtiger node with log file or config file in data directory - false detection of old mmapv1 files&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16283&quot;&gt;&lt;del&gt;SERVER-16283&lt;/del&gt;&lt;/a&gt; prevent server from starting up when non-active storage engine files are detected&lt;br/&gt;
Branch: v2.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/24037e138350ca04e2484468978f58355bf1bb96&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/24037e138350ca04e2484468978f58355bf1bb96&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="771734" author="xgen-internal-githook" created="Mon, 24 Nov 2014 21:41:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; added storage_engine_metadata to src/mongo/SConscript&lt;br/&gt;
Branch: v2.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/10b781ea1d18d8ee487d0e1fc8bef537baabf4fe&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/10b781ea1d18d8ee487d0e1fc8bef537baabf4fe&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="771546" author="xgen-internal-githook" created="Mon, 24 Nov 2014 19:30:26 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16283&quot; title=&quot;Can&amp;#39;t start new wiredtiger node with log file or config file in data directory - false detection of old mmapv1 files&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16283&quot;&gt;&lt;del&gt;SERVER-16283&lt;/del&gt;&lt;/a&gt; improve validation to detect mmapv1 local.ns files&lt;/p&gt;

&lt;p&gt;(cherry picked from commit bb8e5e6b28f31a0b4e9eefc5df52581073bf332d)&lt;br/&gt;
Branch: v2.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/741abbe02d6d0b6eb1334cc66458393363f30833&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/741abbe02d6d0b6eb1334cc66458393363f30833&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="771545" author="xgen-internal-githook" created="Mon, 24 Nov 2014 19:30:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; added storage_engine_metadata - reads and writes storage engine metadata file in data directory&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a932b12ac03366e9336ffc92e7710ddb5c3b3a39)&lt;br/&gt;
Branch: v2.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ae7be5f2fa3ffb4efb51b564bcb5ad00b0033937&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ae7be5f2fa3ffb4efb51b564bcb5ad00b0033937&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="771537" author="xgen-internal-githook" created="Mon, 24 Nov 2014 19:27:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16283&quot; title=&quot;Can&amp;#39;t start new wiredtiger node with log file or config file in data directory - false detection of old mmapv1 files&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16283&quot;&gt;&lt;del&gt;SERVER-16283&lt;/del&gt;&lt;/a&gt; enable storage engine check&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8971aede7a00d0918645cb4fb0e579f153d737df&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8971aede7a00d0918645cb4fb0e579f153d737df&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="771535" author="xgen-internal-githook" created="Mon, 24 Nov 2014 19:27:06 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16283&quot; title=&quot;Can&amp;#39;t start new wiredtiger node with log file or config file in data directory - false detection of old mmapv1 files&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16283&quot;&gt;&lt;del&gt;SERVER-16283&lt;/del&gt;&lt;/a&gt; improve validation to detect mmapv1 local.ns files&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bb8e5e6b28f31a0b4e9eefc5df52581073bf332d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bb8e5e6b28f31a0b4e9eefc5df52581073bf332d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="770665" author="xgen-internal-githook" created="Sun, 23 Nov 2014 01:26:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;monkey101&apos;, u&apos;name&apos;: u&apos;Dan Pasette&apos;, u&apos;email&apos;: u&apos;dan@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; disable storage engine check&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1b8545eb64b7aa260cc281ea2624504c1ee86d23&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1b8545eb64b7aa260cc281ea2624504c1ee86d23&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="769380" author="xgen-internal-githook" created="Thu, 20 Nov 2014 20:44:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; prevent server from starting up when non-active storage engine files are detected&lt;br/&gt;
             added storage_engine_metadata to mongo/db/storage/SConscript&lt;br/&gt;
             fixed cleanbb.py so that cleanup() will remove directories as well.&lt;br/&gt;
             fixed unix_socket1.js so that it does not store socket file in data directory&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b2122dd20ae8cd761312301e90e0e7ca429ec8db&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b2122dd20ae8cd761312301e90e0e7ca429ec8db&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="769379" author="xgen-internal-githook" created="Thu, 20 Nov 2014 20:44:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15986&quot; title=&quot;Starting with different storage engines in the same dbpath should error/warn&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15986&quot;&gt;&lt;del&gt;SERVER-15986&lt;/del&gt;&lt;/a&gt; added storage_engine_metadata - reads and writes storage engine metadata file in data directory&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a932b12ac03366e9336ffc92e7710ddb5c3b3a39&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a932b12ac03366e9336ffc92e7710ddb5c3b3a39&lt;/a&gt;&lt;/p&gt;</comment>
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