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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>[DOCS-13316] Investigate changes in SERVER-44676: PoC: TCP Fast Open</title>
                <link>https://jira.mongodb.org/browse/DOCS-13316</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    This change enables &quot;TCP Fast Open&quot; (TFO) connections to MongoDB.&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;The operating system of both the client and server must have TFO support
	&lt;ul&gt;
		&lt;li&gt;Windows: Server only on Windows 10 or later&lt;/li&gt;
		&lt;li&gt;macOS: Server only on 10.11 or later&lt;/li&gt;
		&lt;li&gt;Linux
		&lt;ul&gt;
			&lt;li&gt;Client: Kernel version &amp;gt;= 4.11, /proc/sys/net/ipv4/tcp_fastopen set to 1 or 3.&lt;/li&gt;
			&lt;li&gt;Server: Kernel version &amp;gt;= 3.7, /proc/sys/net/ipv4/tcp_fastopen set to 2 or 3&lt;/li&gt;
		&lt;/ul&gt;
		&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;setParameters (these are enabled by default):&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;tcpFastOpenClient - Attempt to make outbound TFO connections&lt;/li&gt;
	&lt;li&gt;tcpFastOpenServer - Accept inbound TFO connection attempts&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Additionally the following setParameter may be tuned on the server:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;tcpFastOpenQueueSize (default 1024)&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    We should investigate what work needs to be done to perform TCP Fast Open when speaking to other hosts.&lt;/p&gt;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
</description>
                <environment></environment>
        <key id="1065210">DOCS-13316</key>
            <summary>Investigate changes in SERVER-44676: PoC: TCP Fast Open</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="13201">Fixed</resolution>
                                        <assignee username="ravind.kumar">Ravind Kumar</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Mon, 23 Dec 2019 19:16:13 +0000</created>
                <updated>Mon, 13 Nov 2023 18:12:20 +0000</updated>
                            <resolved>Tue, 28 Jan 2020 23:50:45 +0000</resolved>
                                                    <fixVersion>4.3.3</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2769623" author="ravind.kumar" created="Tue, 28 Jan 2020 23:50:54 +0000"  >&lt;p&gt;Merged to master and published.&lt;/p&gt;</comment>
                            <comment id="2769622" author="xgen-internal-githook" created="Tue, 28 Jan 2020 23:49:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ravind Kumar&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: Fixups for &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13316&quot; title=&quot;Investigate changes in SERVER-44676: PoC: TCP Fast Open&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13316&quot;&gt;&lt;del&gt;DOCS-13316&lt;/del&gt;&lt;/a&gt;, 12991&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/e47ac3d1f5a6acc417f52f81e8384548b00f882f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/e47ac3d1f5a6acc417f52f81e8384548b00f882f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2769619" author="xgen-internal-githook" created="Tue, 28 Jan 2020 23:49:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ravind Kumar&apos;, &apos;email&apos;: &apos;ravind.kumar@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13316&quot; title=&quot;Investigate changes in SERVER-44676: PoC: TCP Fast Open&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13316&quot;&gt;&lt;del&gt;DOCS-13316&lt;/del&gt;&lt;/a&gt;: &lt;span class=&quot;error&quot;&gt;&amp;#91;4.4&amp;#93;&lt;/span&gt; Support for TCP Fast Open Connections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/762f1bef59468e4b32d78ee8d06773009030646b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/762f1bef59468e4b32d78ee8d06773009030646b&lt;/a&gt;&lt;/p&gt;</comment>
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