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</head>
<body class="book">
<div id="header">
<h1>SDP Migration and Upgrade Guide</h1>
<div class="details">
<span id="author" class="author">Perforce Professional Services</span><br>
<span id="email" class="email"><a href="mailto:consulting@perforce.com">consulting@perforce.com</a></span><br>
<span id="revnumber">version v2023.2,</span>
<span id="revdate">2024-02-05</span>
</div>
<div id="toc" class="toc">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_preface">Preface</a></li>
<li><a href="#_introduction">1. Introduction</a>
<ul class="sectlevel2">
<li><a href="#_optimal_helix_core_operating_environment">1.1. Optimal Helix Core Operating Environment</a>
<ul class="sectlevel3">
<li><a href="#_optimal_storage_and_nfs">1.1.1. Optimal Storage and NFS</a></li>
</ul>
</li>
<li><a href="#_motivation">1.2. Motivation</a></li>
</ul>
</li>
<li><a href="#_migration_style_upgrades">2. Migration Style Upgrades</a>
<ul class="sectlevel2">
<li><a href="#_big_blue_green_cutovers">2.1. Big Blue Green Cutovers</a></li>
<li><a href="#_start_state">2.2. Start State</a></li>
<li><a href="#_end_state">2.3. End State</a></li>
</ul>
</li>
<li><a href="#_migration_planning">3. Migration Planning</a>
<ul class="sectlevel2">
<li><a href="#_will_esp_be_used">3.1. Will ESP be used?</a></li>
</ul>
</li>
<li><a href="#_migration_preparation">4. Migration Preparation</a></li>
<li><a href="#_sample_test_plan">5. Sample Test Plan</a></li>
<li><a href="#_sample_cutover_procedure">6. Sample Cutover Procedure</a></li>
<li><a href="#_draft_warning">Appendix A: DRAFT WARNING</a></li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_preface">Preface</h2>
<div class="sectionbody">
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<i class="fa icon-warning" title="Warning"></i>
</td>
<td class="content">
THIS DOCUMENT IS IN DRAFT.
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>This document is useful in when getting an existing Perforce Helix Core installation to the optimal operating environment from any starting condition.  Whether the starting environment is large enterprise or small, on-prem or cloud, or on any operating system, this guide can help get to the optimal deployment environment.</p>
</div>
<div class="paragraph">
<p>This document focuses on software rather than hardware aspects of an optimal operating environment.  While hardware is not discussed in detail, the migration and upgrade plans describe in this document provide opportunity to test and change out hardware.</p>
</div>
<div class="paragraph">
<p>This document does not discuss case sensitivity, case-conversions, or Unicode changes.</p>
</div>
<div class="paragraph">
<p>This guide assumes some familiarity with Perforce Helix Core and does not duplicate basic information in the Helix Core documentation.</p>
</div>
<div class="paragraph">
<p><strong>Please Give Us Feedback</strong></p>
</div>
<div class="paragraph">
<p>Perforce welcomes feedback from our users. Please send any suggestions for improving this document or the SDP to <a href="mailto:consulting@perforce.com">consulting@perforce.com</a>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_introduction">1. Introduction</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_optimal_helix_core_operating_environment">1.1. Optimal Helix Core Operating Environment</h3>
<div class="paragraph">
<p>Getting to an optimal operating environment for Perforce Helix Core first requires defining various aspects of optimal. For our purposes in this document, optimal means:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>SDP version 2020.1+. This is the SDP version from which SDP upgrades are fully automated.</p>
</li>
<li>
<p>Helix Core (P4D) version 2019.1+. The P4D 2013.3 and 2019.1 versions were major architectural overhauls requiring special upgrade procedures.</p>
</li>
<li>
<p>P4D Server is operating on Linux, on a a major version with plenty of support life left in it.  As of this writing, that would be RHEL/Rocky Linux 9, or Ubuntu 22.04.  RHEL/Rocky Linux 8 and Ubuntu 20.04 are actively supported as well, but with less runway available. For EOL dates of various Linux distros, see:</p>
<div class="ulist">
<ul>
<li>
<p><a href="https://access.redhat.com/product-life-cycles/">RHEL</a></p>
</li>
<li>
<p><a href="https://wiki.rockylinux.org/rocky/version/">Rocky</a></p>
</li>
<li>
<p><a href="https://ubuntu.com/about/release-cycle">Ubuntu</a></p>
</li>
<li>
<p><a href="https://www.suse.com/products/server/">SuSE</a></p>
</li>
<li>
<p><a href="https://endoflife.date">EOL dates for multiple distros</a></p>
</li>
</ul>
</div>
</li>
<li>
<p>Physical layer (server machines, storage subsystems, etc.) is as desired.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>The above constitutes the desired <strong>End State</strong> a migration.</p>
</div>
<div class="paragraph">
<p>In public cloud environments, an optimal Helix Core server be deployed instantly in an optimal environment by using the <a href="https://www.perforce.com/blog/vcs/perforce-enhanced-studio-pack">Enhanced Studio Pack (ESP)</a>, an offering on Amazon and Azure marketplaces.</p>
</div>
<div class="sect3">
<h4 id="_optimal_storage_and_nfs">1.1.1. Optimal Storage and NFS</h4>
<div class="paragraph">
<p>This document doesn&#8217;t focus on hardware or storage components of the definition of "optimal" for Helix Core.  Using NFS isn&#8217;t part of the "optimal" definition.  At small scale, the cost and complexity introduced by NFS may not be worth the various benefits.  However, as the scale of data increases to and above tens of Terabytes, options involving more scalable filesystem solutions like NFS start making sense and may even be required.  NFS can be used in on-prem and public cloud environments.</p>
</div>
<div class="paragraph">
<p>ESP installations do not use NFS, and thus would require adjustment to handle very large Helix Core data sets.</p>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_motivation">1.2. Motivation</h3>
<div class="paragraph">
<p>This style of upgrade is commonly referred to as a <strong>global topology upgrade</strong>, sometimes part of a larger <strong>infrastructure modernization</strong> effort. Such upgrades are commonly driven by desires to maintain performance, security, supportability, access to new product features, and in some cases to escape custom aspects of local infrastructure.</p>
</div>
<div class="paragraph">
<p>If <em>all</em> defined aspects of the desired End State are already met, you don&#8217;t need this document. Instead, use the standard upgrade procedure documented in the <a href="https://swarm.workshop.perforce.com/view/guest/perforce_software/sdp/main/doc/SDP_Guide.Unix.html#_upgrades">Upgrades section of the SDP Guide</a>.</p>
</div>
<div class="paragraph">
<p>In some cases, there is an additional motivation: to get assistance for managing Helix Core servers, or perhaps to get out of that role entirely (perhaps due to departure of key personnel).  If there interest in turning over the keys to your Perforce Helix servers, consider <a href="https://www.perforce.com/support/consulting/helix-remote-admin">the Helix Remote Administration program</a>.</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_migration_style_upgrades">2. Migration Style Upgrades</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This document focuses on the Migration-Style Upgrade strategy, as opposed to in situ (in place) upgrades.  In situ upgrades are preferred when your deployment environment is already optimal, as defined above in <a href="#_optimal_helix_core_operating_environment">Section 1.1, &#8220;Optimal Helix Core Operating Environment&#8221;</a>.  If <em>all</em> of the aspects are currently in the desired state, you don&#8217;t need this document. Instead, use the standard upgrade procedure documented in the <a href="https://swarm.workshop.perforce.com/view/guest/perforce_software/sdp/main/doc/SDP_Guide.Unix.html#_upgrades">Upgrades section of the SDP Guide</a>.</p>
</div>
<div class="paragraph">
<p>If the hardware, operating system, or P4D/SDP versions are not as desired, this guide is for you.  A Migration-Style Upgrade is great when you need to make a <em>big change</em> in the least disruptive way possible.  A key characteristic is that of a Migration-Style Upgrade is that your original server environment is largely left alone, with little or no change.</p>
</div>
<div class="sect2">
<h3 id="_big_blue_green_cutovers">2.1. Big Blue Green Cutovers</h3>
<div class="paragraph">
<p>In a Migration-Style Upgrade, a new set of server machines and supporting infrastructure (such as storage) is deployed that reflect the desired End State.  This set of servers is referred to as the "Green" servers or infrastructure.  The current, live production equipment is referred to as the "Blue" servers or infrastructure.</p>
</div>
<div class="paragraph">
<p>In preparation for an eventual cutover, Helix Core data is brought into the Green environment.  This is usually non-disruptive to users operating on the Blue (live production) environment.</p>
</div>
<div class="paragraph">
<p>The Green Environment operates for a time as a test environment, allowing opportunity to test various aspects of the new infrastructure before it become the production infrastructure.  Depending on risks and needs, testing can be cursory or extensive, lasting days or months.</p>
</div>
<div class="admonitionblock tip">
<table>
<tr>
<td class="icon">
<i class="fa icon-tip" title="Tip"></i>
</td>
<td class="content">
If your current method of operating Helix Core does not produce a regular <a href="https://www.perforce.com/manuals/p4sag/Content/P4SAG/backup-recovery-concepts.html">backup of checkpoints and versioned files</a>, a change to the Blue environment will be required to get at least some basic form of checkpoint process in place. This may involve disruptive operations that might need to be scheduled in a maintenance window before the Green environment can be setup initially.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_start_state">2.2. Start State</h3>
<div class="paragraph">
<p>The starting environment can pretty much anything:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Any P4D version going back to 1995.</p>
</li>
<li>
<p>P4D Server operating on Windows, UNIX, Mac, or Linux.</p>
</li>
<li>
<p>Any legacy method of managing Helix Core:</p>
<div class="ulist">
<ul>
<li>
<p>An older version of SDP (prior to 2020.1)</p>
</li>
<li>
<p>Home-grown custom scripts</p>
</li>
<li>
<p>Management scripts provided by a 3rd party such as ICManage.</p>
</li>
<li>
<p>p4dctl</p>
</li>
<li>
<p>entirely with manual procedures (including possibly no manual procedures).</p>
</li>
</ul>
</div>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_end_state">2.3. End State</h3>
<div class="paragraph">
<p>At a minimum, the desired <strong>End State</strong> of a Migration-Style Upgrade is as defined above in <a href="#_optimal_helix_core_operating_environment">Section 1.1, &#8220;Optimal Helix Core Operating Environment&#8221;</a>.  In addition to those aspects, you may choose to add other aspects to your desired <strong>End State</strong>, depending on the goals of your migration.  In the mindset of "While we&#8217;re at it," some common examples things added to the End State definition are:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Authentication and Single-Sign On (SSO): Enable a Single Sign On (SSO) solution using the <a href="https://github.com/perforce/helix-authentication-service/">Helix Authentication Service</a>.</p>
</li>
<li>
<p>Monitoring: Deploy monitoring with <a href="https://github.com/perforce/p4prometheus">P4Prometheus</a>.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Even if you are "pretty close" to the definition of optimal, say on Rocky Linux 8 but otherwise modern, the Migration-Style Upgrade is the preferred method of getting to the modern topology.  (If your environment is optimal in all other respects and <em>only</em> the P4D version is older, than you might consider an in situ upgrade).  Other options are not discussed in this document, because the Migration-Style Upgrade has significant benefits that often make it preferable even when other options are possible.</p>
</div>
<div class="paragraph">
<p>The specific starting environment will impact migration options and procedures, as will be called out in this document.</p>
</div>
<div class="paragraph">
<p>Some <em>big changes</em> that call for a Migration-Style Upgrade include:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Windows to Linux migration.</p>
</li>
<li>
<p>Upgrade of a major operating system version (e.g. CentOS 7 &#8594; Rocky 8, RHEL 8 &#8594; RHEL 9, Ubuntu 20.04 &#8594; Ubuntu 22.04).</p>
</li>
<li>
<p>Upgrade of SDP from a version prior to 2020.1, where the <a href="https://swarm.workshop.perforce.com/view/guest/perforce_software/sdp/main/doc/SDP_Legacy_Upgrades.Unix.html">SDP Legacy Upgrades</a> applies, a well-documented but manual upgrade procedure.  That document is for in situ upgrades of SDP&#8201;&#8212;&#8201;this document avoids the in situ procedure entirely by using a Migration-Style Upgrade.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>The primary scenario this document is focused on is a migration to a cloud provider, though only minor adaptations are needed if going to an on-premises environment. We lean toward a cloud environments for documentation purposes, because we can assume more, and define more, with a cloud as a target.  If your target environment is on-prem some aspects are available.</p>
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<div class="sect1">
<h2 id="_migration_planning">3. Migration Planning</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p>To ESP, nor not to ESP?</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>EDITME</p>
</div>
<div class="sect2">
<h3 id="_will_esp_be_used">3.1. Will ESP be used?</h3>
<div class="paragraph">
<p>The <a href="https://www.perforce.com/blog/vcs/perforce-enhanced-studio-pack">Enhanced Studio Pack (ESP)</a> should be considered if the target environment is Amazon or Azure.  ESP is not available for on-prem, and not presently available for any other cloud environments.  Even in cases where ESP is available, it may not be the best choice.  Some cases where ESP is not optimal or would need adjustment afterward include:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>You have a corporate policy that dictates machines must be launched from internally produced baseline virtual machines images.  ESP is essentially a set of machine images, but of course not be based on any customer&#8217;s unique base images. (In some cases, an exception can be granted because ESP is reasonably well secured, using <a href="https://www.perforce.com/press-releases/support-rocky-linux-and-centos-alternatives">Security Enhanced Rocky Linux provided by Perforce OpenLogic</a>).</p>
</li>
<li>
<p>You plan to use advanced storage solutions like NFS.</p>
</li>
<li>
<p>Your <code>perforce</code> operating system user is defined in LDAP rather than being local.  (Note: We recommend using local accounts when you can for optimal reliability, but using an LDAP account is required when using NFS to ensure user IDs align across a fleet of server machines).</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>EDITME</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_migration_preparation">4. Migration Preparation</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p>Build the Green Infrastructure.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>EDITME</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_sample_test_plan">5. Sample Test Plan</h2>
<div class="sectionbody">
<div class="paragraph">
<p>EDITME</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_sample_cutover_procedure">6. Sample Cutover Procedure</h2>
<div class="sectionbody">
<div class="paragraph">
<p>EDITME - Add content here.</p>
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</div>
</div>
<div class="sect1">
<h2 id="_draft_warning">Appendix A: DRAFT WARNING</h2>
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<div class="admonitionblock warning">
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<td class="icon">
<i class="fa icon-warning" title="Warning"></i>
</td>
<td class="content">
THIS DOCUMENT IS IN DRAFT.
</td>
</tr>
</table>
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<div id="footer">
<div id="footer-text">
Version v2023.2<br>
Last updated 2024-02-06 11:55:38 -0500
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# Change User Description Committed
#8 30913 C. Thomas Tyler Regnerated docs for release.
#7 30385 C. Thomas Tyler Regnerated docs for release.
#6 30294 C. Thomas Tyler Updated docs for release.
#5 30177 C. Thomas Tyler SDP_Win2Linux_Guide...
#4 30172 C. Thomas Tyler DRAFT doc, work in progress.
#3 30152 C. Thomas Tyler Documentaion work-in-progress.
#2 30105 C. Thomas Tyler WIP.
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