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    <title>MongoDB Jira</title>
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    <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-3482] oplog replay should check first element in oplog before going backwards for initial sync performance</title>
                <link>https://jira.mongodb.org/browse/SERVER-3482</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="20157">SERVER-3482</key>
            <summary>oplog replay should check first element in oplog before going backwards for initial sync performance</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="aaron">Aaron Staple</assignee>
                                    <reporter username="eliot">Eliot Horowitz</reporter>
                        <labels>
                    </labels>
                <created>Tue, 26 Jul 2011 17:40:44 +0000</created>
                <updated>Tue, 12 Jul 2016 00:20:41 +0000</updated>
                            <resolved>Mon, 1 Aug 2011 17:16:32 +0000</resolved>
                                                    <fixVersion>1.9.2</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="45495" author="auto" created="Sun, 31 Jul 2011 17:28:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;astaple&apos;, u&apos;name&apos;: u&apos;Aaron&apos;, u&apos;email&apos;: u&apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3482&quot; title=&quot;oplog replay should check first element in oplog before going backwards for initial sync performance&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3482&quot;&gt;&lt;del&gt;SERVER-3482&lt;/del&gt;&lt;/a&gt; update tests, handle empty oplog properly&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/26e10443f5a8530853756f00ffe4aae77e6f9cae&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/26e10443f5a8530853756f00ffe4aae77e6f9cae&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="45485" author="auto" created="Sun, 31 Jul 2011 17:28:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;astaple&apos;, u&apos;name&apos;: u&apos;Aaron&apos;, u&apos;email&apos;: u&apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3482&quot; title=&quot;oplog replay should check first element in oplog before going backwards for initial sync performance&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3482&quot;&gt;&lt;del&gt;SERVER-3482&lt;/del&gt;&lt;/a&gt; check oldest op first when doing oplog replay, wassert instead of massert on encountering empty extent&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/175e0392475935552f83b1719936750e362f45cc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/175e0392475935552f83b1719936750e362f45cc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="44574" author="eliot" created="Tue, 26 Jul 2011 18:05:11 +0000"  >&lt;p&gt;Right.&lt;/p&gt;

&lt;p&gt;So full process should be&lt;/p&gt;

&lt;p&gt;1) check first element in capped collection&lt;br/&gt;
2) scan backwards for 5 secconds&lt;br/&gt;
3) extent by extent scan&lt;/p&gt;</comment>
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