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deh_umn_0425

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Reviewed-by: Pristromskaia, Margarita <margarita.pristromskaia@t-systems.com>
Co-authored-by: guoyanyan <guoyanyan3@huawei.com>
Co-committed-by: guoyanyan <guoyanyan3@huawei.com>
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guoyanyan 2023-05-15 13:55:23 +00:00 committed by zuul
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<div id="body1483864743550"><p id="deh_01_0005__p85522012803">The DeH category and type define the DeH configuration and determine the type and number of ECSs you can create on the DeH.</p>
<p id="deh_01_0005__p181717475811">The DeH configuration includes the number of CPUs (sockets), number of physical cores, local storage, hardware configuration (CPU model and memory size), and number of vCPUs. Buy DeHs of desired specifications based on the site requirements.</p>
<p id="deh_01_0005__p1523814104314">Currently, the following DeH categories and types are supported:</p>
<ul id="deh_01_0005__ul1843610910507"><li id="deh_01_0005__li34369935016">General-purpose DeHs</li><li id="deh_01_0005__li1056662583212">General computing-plus DeHs</li><li id="deh_01_0005__li54361693506">Dedicated general-purpose DeHs</li><li id="deh_01_0005__li1436109195018">Memory-optimized DeHs</li><li id="deh_01_0005__li124361190504">High-performance DeHs</li><li id="deh_01_0005__li1443620914503">Disk-intensive DeHs</li><li id="deh_01_0005__li17558171954610">Ultra-high I/O DeHs</li></ul>
<ul id="deh_01_0005__ul1843610910507"><li id="deh_01_0005__li34369935016">General-purpose DeHs</li><li id="deh_01_0005__li1056662583212">General computing-plus DeHs</li><li id="deh_01_0005__li54361693506">Dedicated general-purpose DeHs</li><li id="deh_01_0005__li1436109195018">Memory-optimized DeHs</li><li id="deh_01_0005__li17558171954610">Ultra-high I/O DeHs</li></ul>
</div>
<div>
<div class="familylinks">

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<div class="section" id="deh_01_0024__section1241956132810"><h4 class="sectiontitle">Procedure</h4><ol id="deh_01_0024__ol1724145632818"><li id="deh_01_0024__li0241456122813">Log in to the management console.</li><li id="deh_01_0024__li305035211239">Click <span><img id="deh_01_0024__deh_01_0012_image37839102485" src="en-us_image_0210485079.png"></span> in the upper left corner and select the desired region and project.</li><li id="deh_01_0024__li102415612815">Under <strong id="deh_01_0024__b9749134544813">Computing</strong>, click <strong id="deh_01_0024__b7750745134818">Dedicated Host</strong>.<p id="deh_01_0024__p192414564283">The <strong id="deh_01_0024__b16847161757">Dedicated Host</strong> page is displayed.</p>
</li><li id="deh_01_0024__li13241956132818">Click the name of the target DeH.<p id="deh_01_0024__p8244567289"><a name="deh_01_0024__li13241956132818"></a><a name="li13241956132818"></a>The DeH details page is displayed.</p>
</li><li id="deh_01_0024__li19241356182817">On the <strong id="deh_01_0024__b84235270618331">ECSs on the DeH</strong> tab, locate the target ECS and select the target option in the <strong id="deh_01_0024__b84235270618513">Operation</strong> column to manage the ECS. Alternatively, select the target ECSs and select an operation above the ECS list.<p id="deh_01_0024__p1077069410193">The options are as follows:</p>
<ul id="deh_01_0024__ul57580574101918"><li id="deh_01_0024__li1737271719503"><strong id="deh_01_0024__b84235270694052">Modify Specifications</strong> (allowed only when ECSs are stopped)</li><li id="deh_01_0024__li32555009101918"><strong id="deh_01_0024__b84235270618622">Start</strong> (allowed only when ECSs are stopped)</li><li id="deh_01_0024__li10627609101921"><strong id="deh_01_0024__b892021590">Stop</strong> (allowed only when ECSs are running)</li><li id="deh_01_0024__li7047769101923"><strong id="deh_01_0024__b1055396579">Restart</strong> (allowed only when ECSs are running)</li><li id="deh_01_0024__li19675933184017"><strong id="deh_01_0024__b84235270618941">Delete</strong></li></ul>
<ul id="deh_01_0024__ul57580574101918"><li id="deh_01_0024__li1737271719503"><strong id="deh_01_0024__b84235270694052">Modify Specifications</strong> (allowed only when ECSs are stopped)</li><li id="deh_01_0024__li32555009101918"><strong id="deh_01_0024__b84235270618622">Start</strong> (allowed only when ECSs are stopped)</li><li id="deh_01_0024__li10627609101921"><strong id="deh_01_0024__b253109686">Stop</strong> (allowed only when ECSs are running)</li><li id="deh_01_0024__li7047769101923"><strong id="deh_01_0024__b484416454">Restart</strong> (allowed only when ECSs are running)</li><li id="deh_01_0024__li19675933184017"><strong id="deh_01_0024__b84235270618941">Delete</strong></li></ul>
</li></ol>
</div>
<div class="section" id="deh_01_0024__section6175746102828"><h4 class="sectiontitle">Related Operations</h4><p id="deh_01_0024__p34140468102839">On the <strong id="deh_01_0024__b60908312875218">ECSs on the DeH</strong> tab page, you can also click Create to create ECSs.</p>

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</th>
</tr>
</thead>
<tbody>
<tbody><tr id="deh_01_0027__row14650535115514"><td class="cellrowborder" valign="top" width="21.04210421042104%" headers="mcps1.3.2.2.4.1.1 "><p id="deh_01_0027__p20650103511557">Billing items</p>
</td>
<td class="cellrowborder" valign="top" width="35.3035303530353%" headers="mcps1.3.2.2.4.1.2 "><p id="deh_01_0027__p134571251703">The total price is determined by the ECS type, specifications (including vCPUs and memory), usage duration, and the number of purchased ECSs.</p>
</td>
<td class="cellrowborder" valign="top" width="43.65436543654365%" headers="mcps1.3.2.2.4.1.3 "><p id="deh_01_0027__p45651535120">No additional fees are needed for ECSs on your DeHs.</p>
<p id="deh_01_0027__p17347813889">The compute resources used by ECSs on DeHs are free.</p>
</td>
</tr>
<tr id="deh_01_0027__row0650635115513"><td class="cellrowborder" valign="top" width="21.04210421042104%" headers="mcps1.3.2.2.4.1.1 "><p id="deh_01_0027__p865012355559">ECS flavors</p>
</td>
<td class="cellrowborder" valign="top" width="35.3035303530353%" headers="mcps1.3.2.2.4.1.2 "><p id="deh_01_0027__p117197585445">Multiple ECS types are supported. For details, see the <em id="deh_01_0027__i84235269717538">Elastic Cloud Server User Guide</em>.</p>

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</th>
<th align="left" class="cellrowborder" valign="top" width="12.121212121212121%" id="mcps1.3.2.2.2.6.1.2"><p id="deh_01_0031__p191221415163"><strong id="deh_01_0031__b8847636163021">Number of CPUs (Sockets)</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="14.141414141414144%" id="mcps1.3.2.2.2.6.1.3"><p id="deh_01_0031__p19912514161611"><strong id="deh_01_0031__b1673964582">Number of Physical Cores</strong></p>
<th align="left" class="cellrowborder" valign="top" width="14.141414141414144%" id="mcps1.3.2.2.2.6.1.3"><p id="deh_01_0031__p19912514161611"><strong id="deh_01_0031__b1530509134">Number of Physical Cores</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="48.484848484848484%" id="mcps1.3.2.2.2.6.1.4"><p id="deh_01_0031__p119121614111614"><strong id="deh_01_0031__b1988301369">Hardware Specifications</strong></p>
<th align="left" class="cellrowborder" valign="top" width="48.484848484848484%" id="mcps1.3.2.2.2.6.1.4"><p id="deh_01_0031__p119121614111614"><strong id="deh_01_0031__b1140239588">Hardware Specifications</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="11.111111111111112%" id="mcps1.3.2.2.2.6.1.5"><p id="deh_01_0031__p1091216148168">vCPUs</p>
</th>
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</div>
<div class="note" id="deh_01_0031__note7797104192917"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="deh_01_0031__p379813422911">Number of vCPUs = (Number of sockets x Number of cores x Number of single-core threads - CPU overheads) x CPU overcommitment ratio</p>
<ul id="deh_01_0031__ul452119381167"><li id="deh_01_0031__li1142219514282">c4 DeHs<p id="deh_01_0031__p19296259112812"><a name="deh_01_0031__li1142219514282"></a><a name="li1142219514282"></a>vCPUs = (2 x 22 x 2 - 14) x 1 = 74</p>
<p id="deh_01_0031__p11427191120363">If you want to deploy ECSs that have only 4, 8, 16, 24, or 32 vCPUs on a c3, c3_pro, or c3ne DeH, you can assume that the DeH has 64 vCPUs to improve the DeH utilization.</p>
<p id="deh_01_0031__p19344191253620"></p>
</li></ul>
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<div id="body1549854860836"><div class="section" id="deh_01_0034__section102291042164212"><h4 class="sectiontitle">What Is Quota?</h4><p id="deh_01_0034__en-us_topic_0040259342_p1415804616467">Quotas can limit the number or amount of resources available to users, such as the maximum number of ECSs or EVS disks that can be created.</p>
<p id="deh_01_0034__en-us_topic_0040259342_p547171214515">If the existing resource quota cannot meet your service requirements, you can apply for a higher quota.</p>
</div>
<div class="section" id="deh_01_0034__section07760615438"><h4 class="sectiontitle">How Do I View My Quotas?</h4><ol id="deh_01_0034__en-us_topic_0040259342_ol1222775692215"><li id="deh_01_0034__en-us_topic_0040259342_li5648642910048">Log in to the management console.</li><li id="deh_01_0034__en-us_topic_0040259342_li464234814566">Click <span><img id="deh_01_0034__en-us_topic_0040259342_en-us_topic_0014250631_en-us_topic_0014250631_image1733511156361" src="en-us_image_0275513364.png"></span> in the upper left corner and select the desired region and project.</li><li id="deh_01_0034__en-us_topic_0040259342_li3861581410048">In the upper right corner of the page, click <span><img id="deh_01_0034__en-us_topic_0040259342_image99377514309" src="en-us_image_0152727234.png"></span>.<p id="deh_01_0034__en-us_topic_0040259342_p1748884433119">The <strong id="deh_01_0034__en-us_topic_0040259342_b695801964614">Service Quota</strong> page is displayed.</p>
<div class="section" id="deh_01_0034__section07760615438"><a name="deh_01_0034__section07760615438"></a><a name="section07760615438"></a><h4 class="sectiontitle">How Do I View My Quotas?</h4><ol id="deh_01_0034__en-us_topic_0040259342_ol1222775692215"><li id="deh_01_0034__en-us_topic_0040259342_li5648642910048">Log in to the management console.</li><li id="deh_01_0034__en-us_topic_0040259342_li464234814566">Click <span><img id="deh_01_0034__en-us_topic_0040259342_en-us_topic_0014250631_en-us_topic_0014250631_image1733511156361" src="en-us_image_0275513364.png"></span> in the upper left corner and select the desired region and project.</li><li id="deh_01_0034__en-us_topic_0040259342_li3861581410048">In the upper right corner of the page, click <span><img id="deh_01_0034__en-us_topic_0040259342_image99377514309" src="en-us_image_0152727234.png"></span>.<p id="deh_01_0034__en-us_topic_0040259342_p1748884433119">The <strong id="deh_01_0034__en-us_topic_0040259342_b695801964614">Service Quota</strong> page is displayed.</p>
</li><li id="deh_01_0034__en-us_topic_0040259342_li1579070183211">View the used and total quota of each type of resources on the displayed page.<p id="deh_01_0034__en-us_topic_0040259342_p97891720193417"><a name="deh_01_0034__en-us_topic_0040259342_li1579070183211"></a><a name="en-us_topic_0040259342_li1579070183211"></a>If a quota cannot meet service requirements, apply for a higher quota.</p>
</li></ol>
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</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0105897861.html">Memory-Optimized DeHs</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_01_0053.html">High-Performance DeHs</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_01_0054.html">Disk-Intensive DeHs</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_01_0055.html">Ultra-High I/O DeHs</a></strong><br>
</li>
</ul>

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<a name="deh_faq_0004"></a><a name="deh_faq_0004"></a>
<h1 class="topictitle1">What Should I Do If I Fail to Create an ECS on a DeH?</h1>
<div id="body1484839453949"><p id="deh_faq_0004__p52614780232618">The following may cause the failure in creating an ECS on a DeH: </p>
<ul id="deh_faq_0004__ul3970413023272"><li id="deh_faq_0004__li2016143823272">The ECS flavor you selected is not supported by your DeH.<p id="deh_faq_0004__p18551931232838"><a name="deh_faq_0004__li2016143823272"></a><a name="li2016143823272"></a>For the ECS flavors supported by each DeH type, see <a href="deh_01_0005.html">Overview</a>.</p>
</li><li id="deh_faq_0004__li14627670232752">Your DeH resources are insufficient, resulting in failure in creating an ECS with the specifications you selected.<p id="deh_faq_0004__p53179155233027"><a name="deh_faq_0004__li14627670232752"></a><a name="li14627670232752"></a>You can check whether the remaining vCPU resources and memory size of your DeH are sufficient for creating an ECS with the specifications you selected. If the resources are insufficient, you need to apply for more DeH resources or delete some ECSs from your DeH.</p>
</li></ul>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0200.html">ECS FAQs</a></div>
</div>
</div>

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<a name="deh_faq_0005"></a><a name="deh_faq_0005"></a>
<h1 class="topictitle1">Does Each DeH Have a Unique ID?</h1>
<div id="body1538107301898"><p id="deh_faq_0005__p8060118">Yes. Each DeH has a unique ID.</p>
<div class="fignone" id="deh_faq_0005__fig5228153285116"><span class="figcap"><b>Figure 1 </b>DeH ID</span><br><span><img id="deh_faq_0005__image557173312332" src="en-us_image_0000001540710213.png"></span></div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
</div>

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<a name="deh_faq_0006"></a><a name="deh_faq_0006"></a>
<h1 class="topictitle1">What Are the Differences Between DeHs and BMSs?</h1>
<div id="body1538107301898"><p id="deh_faq_0006__p345517914589">Bare metal servers and dedicated hosts are physically-isolated servers dedicated to individual tenants. Their differences are as follows:</p>
<ul id="deh_faq_0006__ul1165311325810"><li id="deh_faq_0006__li136531613115814">DeH: A dedicated host is fully exclusive for your ECSs, but cannot be directly used for running workloads. You can deploy ECSs for running workloads on a dedicated host.</li><li id="deh_faq_0006__li18653141365819">BMS: A BMS is used as a server and can be directly used for running your services.</li></ul>
<div class="fignone" id="deh_faq_0006__fig1099284312819"><span class="figcap"><b>Figure 1 </b>Differences between DeHs and BMSs</span><br><span><img id="deh_faq_0006__image2099384382810" src="en-us_image_0000001441682817.png"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="deh_faq_0006__table8831105184616" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Differences between DeHs and BMSs</caption><thead align="left"><tr id="deh_faq_0006__row1183214515465"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.4.2.4.1.1"><p id="deh_faq_0006__p68321551154618"><strong id="deh_faq_0006__b27961622181814">Item</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.4.2.4.1.2"><p id="deh_faq_0006__p2083211518465"><strong id="deh_faq_0006__b653151410183">DeH</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.4.2.4.1.3"><p id="deh_faq_0006__p683213511468">BMS</p>
</th>
</tr>
</thead>
<tbody><tr id="deh_faq_0006__row9832195164611"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.1 "><p id="deh_faq_0006__p683345118465">Virtualization provided</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.2 "><p id="deh_faq_0006__p2083325113461">Yes</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.3 "><p id="deh_faq_0006__p983318514465">No</p>
</td>
</tr>
<tr id="deh_faq_0006__row14833145124611"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.1 "><p id="deh_faq_0006__p883315104615">Usage</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.2 "><p id="deh_faq_0006__p108334515468">Provisioning of multiple ECSs on a DeH</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.3 "><p id="deh_faq_0006__p118336518465">Used as a whole server</p>
</td>
</tr>
<tr id="deh_faq_0006__row19833051174618"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.1 "><p id="deh_faq_0006__p11833115154619">Supported specifications</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.2 "><p id="deh_faq_0006__p16833165104612">Specifications of physical servers running DeHs and supported ECS specifications</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.3 "><p id="deh_faq_0006__p1883375104612">Only BMS specifications</p>
</td>
</tr>
<tr id="deh_faq_0006__row326018095012"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.1 "><p id="deh_faq_0006__p1326118015018">Supported images</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.2 "><p id="deh_faq_0006__p13261160185019">ECS images</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.4.2.4.1.3 "><p id="deh_faq_0006__p2261180125018">Only BMS images</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
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<a name="deh_faq_0007"></a><a name="deh_faq_0007"></a>
<h1 class="topictitle1">What Are the Differences Between DeH and DeC?</h1>
<div id="body1538107301898"><ul id="deh_faq_0007__ul175903941111"><li id="deh_faq_0007__li25908910111">Scenario<p id="deh_faq_0007__p191258551517"><a name="deh_faq_0007__li25908910111"></a><a name="li25908910111"></a>DeC can provide a complete resource isolation solution by using dedicated services, such as Dedicated Distributed Storage Service (DSS) Dedicated Enterprise Storage Service (DESS), and Bare Metal Server (BMS).</p>
<p id="deh_faq_0007__p1981201271118">DeH can provide only isolated compute hosts, which are more flexible and suitable for customers who have requirements for computing resource isolation and flexibility.</p>
</li><li id="deh_faq_0007__li10590119101117">Function<p id="deh_faq_0007__p96252611158"><a name="deh_faq_0007__li10590119101117"></a><a name="li10590119101117"></a>You need to apply for an independent DeC account before requesting DeC resources. DeC resources and public ECSs belong to different VPCs. Common ECSs cannot be migrated to a DeC, and ECSs in a DeC cannot be migrated to common resource pools.</p>
<p id="deh_faq_0007__p1517911168115">ECSs created on a DeH and ECSs in the public resource pool share the same VPC. So, stopped ECSs can be migrated between a DeH and a resource pool.</p>
</li></ul>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
</div>

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<h1 class="topictitle1">How Can I Query the Number of Available Resources on a DeH?</h1>
<div id="body1538107301898"><p id="deh_faq_0009__p2908554145014">You can view the total resources and available resources (vCPUs and memory) of each DeH on the DeH console.</p>
<p id="deh_faq_0009__p49394576507"></p>
<div class="fignone" id="deh_faq_0009__fig48651568461"><span class="figcap"><b>Figure 1 </b>Querying available resources of a DeH</span><br><span><img id="deh_faq_0009__image364719191475" src="en-us_image_0000001540675997.png"></span></div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
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<h1 class="topictitle1">Does DeH Support Capacity Expansion?</h1>
<div id="body1538107301898"><p id="deh_faq_0010__p8060118">No. The hardware configuration of DeHs is planned based on the specifications and quantity of ECSs to be provisioned. You can buy more DeHs based on your service requirements.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
</div>

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<h1 class="topictitle1">How Can I Use the BYOL Mode on a DeH?</h1>
<div id="body1538107301898"><p id="deh_faq_0011__p8060118">Perform the following steps:</p>
<ol id="deh_faq_0011__ol49819128264"><li id="deh_faq_0011__li129821215261">Check whether the license terms and conditions allow you to use the software license on DeHs. Contact the software license provider to confirm whether your existing license can be used on the DeHs. If yes, go to the next step.</li><li id="deh_faq_0011__li136921116162717">Submit a review form to your software license provider. You can obtain the values of DeH parameters, such as vCPUs, memory size, sockets, and physical cores, form on the DeH console.</li></ol>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
</div>

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<a name="deh_faq_0013"></a><a name="deh_faq_0013"></a>
<h1 class="topictitle1">What Are the Restrictions on Creating ECSs on a DeH?</h1>
<div id="body1538123919288"><p id="deh_faq_0013__p8060118">The ECS flavors are determined by the DeH type. For more information, see <a href="deh_01_0056.html">Categories and Types</a>.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0200.html">ECS FAQs</a></div>
</div>
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<h1 class="topictitle1">Can I Create ECSs of Different Flavors on a DeH?</h1>
<div id="body1538123919288"><p id="deh_faq_0014__p298871212533">Yes. You can create ECSs of different type and flavors on a DeH.</p>
<p id="deh_faq_0014__p43843472148">For example, you can create c4 ECSs on c4 DeHs. c4 includes a series of flavors, such as c4.large.2 and c4.xlarge.2.</p>
<p id="deh_faq_0014__p1655110239165"></p>
<div class="fignone" id="deh_faq_0014__fig12858910151812"><span class="figcap"><b>Figure 1 </b>ECS flavors allowed on DeH</span><br><span><img id="deh_faq_0014__image23971246101816" src="en-us_image_0000001540505321.png"></span></div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0200.html">ECS FAQs</a></div>
</div>
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<h1 class="topictitle1">Can I Modify Specifications of ECSs on DeHs?</h1>
<div id="body1538123919288"><p id="deh_faq_0015__p178402489589">Yes. You can modify specifications of ECSs on DeHs by performing the operations described in <a href="deh_01_0028.html">Modifying Specifications of ECSs on DeHs</a>.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0200.html">ECS FAQs</a></div>
</div>
</div>

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<h1 class="topictitle1">When a DeH Is Needed?</h1>
<div id="body1561101115883"><p id="deh_faq_0019__p8060118">When your services are required to meet high compliance, security, or performance requirements, you can purchase DeHs. For more information, see <a href="deh_01_0008.html">Application Scenarios</a>.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
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<h1 class="topictitle1">Can I DeHs by Myself?</h1>
<div id="body1561101115884"><p id="deh_faq_0020__p8060118">Yes. You can DeHs on the management console. For more information, see <a href="deh_01_0012.html">Allocating DeHs</a>.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
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<h1 class="topictitle1">Can DeHs Be Used to Build Websites?</h1>
<div id="body1573809052280"><p id="deh_faq_0021__p8060118">ECSs or ECSs created on DeHs can be used to build websites.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
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<h1 class="topictitle1">What Hypervisor Is Used by DeH?</h1>
<div id="body1579418821295"><p id="deh_faq_0022__p8060118">DeHs use KVM. Only KVM ECSs can be deployed on the DeHs.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="deh_faq_0001.html">What Is DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0019.html">When a DeH Is Needed?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0021.html">Can DeHs Be Used to Build Websites?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0020.html">Can I DeHs by Myself?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0022.html">What Hypervisor Is Used by DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0005.html">Does Each DeH Have a Unique ID?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0006.html">What Are the Differences Between DeHs and BMSs?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0007.html">What Are the Differences Between DeH and DeC?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0008.html">What Are the Differences Between DeHs and ECSs?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0009.html">How Can I Query the Number of Available Resources on a DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0010.html">Does DeH Support Capacity Expansion?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0002.html">What Is BYOL?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0011.html">How Can I Use the BYOL Mode on a DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_090114.html">Can I Attach an EVS Disk to a DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_090115.html">Is There a Limit on the Minimum or Maximum Number of DeHs That Can Be Purchased?</a></strong><br>
</li>
</ul>
<div class="familylinks">

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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="deh_faq_0012.html">What Are the Differences Between ECSs on DeHs and ECSs on Shared Hosts?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0013.html">What Are the Restrictions on Creating ECSs on a DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0014.html">Can I Create ECSs of Different Flavors on a DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0015.html">Can I Modify Specifications of ECSs on DeHs?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0004.html">What Should I Do If I Fail to Create an ECS on a DeH?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="deh_faq_0016.html">Can I Migrate ECSs in Resource Pools to DeHs?</a></strong><br>
</li>
</ul>

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<a name="deh_faq_090115"></a><a name="deh_faq_090115"></a>
<h1 class="topictitle1">Is There a Limit on the Minimum or Maximum Number of DeHs That Can Be Purchased?</h1>
<div id="body0000001283104981"><p id="deh_faq_090115__p55611051513">The minimum number of DeHs that can be purchased is not limited. You can purchase one or more DeHs.</p>
<p id="deh_faq_090115__p20587191012591">The maximum number of DeHs that can be purchased is limited. You can <a href="deh_01_0034.html#deh_01_0034__section07760615438">view the quota</a> to learn about the maximum number of DeHs that you can purchase. To increase the quota, you can <a href="deh_01_0034.html#deh_01_0034__section07760615438">apply for a higher quota</a>.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="deh_faq_0100.html">DeH FAQs</a></div>
</div>
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</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0047250587__row37111433359"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0047250587__p37121333057">2023-03-23</p>
<tbody><tr id="EN-US_TOPIC_0047250587__row1924628134319"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0047250587__p59258288437">2023-05-12</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0047250587__p141601587617">This issue is the twenty-first official release.</p>
<p id="EN-US_TOPIC_0047250587__p18160168766">Added:</p>
<ul id="EN-US_TOPIC_0047250587__ul21601781567"><li id="EN-US_TOPIC_0047250587__li37181823867"><a href="deh_01_0009.html">Permissions</a></li><li id="EN-US_TOPIC_0047250587__li189243541964"><a href="deh_01_0050.html">Permission Management</a></li><li id="EN-US_TOPIC_0047250587__li169251541615"><a href="deh_01_0051.html">Creating a User and Granting Permissions</a></li><li id="EN-US_TOPIC_0047250587__li792513548617"><a href="deh_01_0052.html">Creating a Custom Policy</a></li></ul>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0047250587__p6290134214431">This issue is the twenty-third official release.</p>
<p id="EN-US_TOPIC_0047250587__p42904420433">Modified the following content:</p>
<p id="EN-US_TOPIC_0047250587__p3856104704315">Deleted high-performance and disk-intensive DeHs in <a href="deh_01_0005.html">Overview</a>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0047250587__row17322173092119"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0047250587__p83234302219">2023-05-09</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0047250587__p53231630112117">This issue is the twenty-second official release.</p>
<p id="EN-US_TOPIC_0047250587__p10693743202115">Modified the following sections:</p>
<ul id="EN-US_TOPIC_0047250587__ul1096415159221"><li id="EN-US_TOPIC_0047250587__li101135511718">Deleted the general, s1, c1, c2, and m1 Xen specifications in <a href="deh_01_0006.html">General-Purpose DeHs</a>.</li><li id="EN-US_TOPIC_0047250587__li5496947185112">Deleted the inappropriate description about c4 DeHs in <a href="deh_01_0031.html">General Computing-Plus DeHs</a>. </li><li id="EN-US_TOPIC_0047250587__li15702145725110">Deleted <strong id="EN-US_TOPIC_0047250587__b1251663116461">For more information</strong> in <a href="deh_faq_0019.html">When a DeH Is Needed?</a>.</li><li id="EN-US_TOPIC_0047250587__li820212312321">Deleted the sections <strong id="EN-US_TOPIC_0047250587__b17597153242310">High-Performance DeHs</strong> and <strong id="EN-US_TOPIC_0047250587__b226363582312">Disk-Intensive DeHs</strong> because the h1 and d1 specifications of the Xen architecture are out of production.</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0047250587__row73861785812"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0047250587__p138712817813">2023-04-23</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0047250587__p738711818818">This issue is the twenty-first official release.</p>
<p id="EN-US_TOPIC_0047250587__p8821187101712">Added:</p>
<ul id="EN-US_TOPIC_0047250587__ul21601781567"><li id="EN-US_TOPIC_0047250587__li37181823867"><a href="deh_01_0009.html">Permissions</a></li></ul>
<ul id="EN-US_TOPIC_0047250587__ul7902175131215"><li id="EN-US_TOPIC_0047250587__deh_12_0005_li1343817371489"><a href="deh_01_0034.html">Adjusting DeH Resource Quotas</a></li><li id="EN-US_TOPIC_0047250587__li189243541964"><a href="deh_01_0050.html">Permission Management</a></li><li id="EN-US_TOPIC_0047250587__li169251541615"><a href="deh_01_0051.html">Creating a User and Granting Permissions</a></li><li id="EN-US_TOPIC_0047250587__li792513548617"><a href="deh_01_0052.html">Creating a Custom Policy</a></li></ul>
<ul id="EN-US_TOPIC_0047250587__ul1720464719146"><li id="EN-US_TOPIC_0047250587__deh_12_0003_li159465201345"><a href="deh_faq_0022.html">What Hypervisor Is Used by DeH?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0003_li199461520448"><a href="deh_faq_0006.html">What Are the Differences Between DeHs and BMSs?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0003_li1194614201448"><a href="deh_faq_0007.html">What Are the Differences Between DeH and DeC?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0003_li1294617207417"><a href="deh_faq_0010.html">Does DeH Support Capacity Expansion?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0003_li894617201548"><a href="deh_faq_0011.html">How Can I Use the BYOL Mode on a DeH?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0003_li16946020248"><a href="deh_faq_090115.html">Is There a Limit on the Minimum or Maximum Number of DeHs That Can Be Purchased?</a></li></ul>
<ul id="EN-US_TOPIC_0047250587__ul87000525144"><li id="EN-US_TOPIC_0047250587__deh_12_0005_li959261416119"><a href="deh_faq_0019.html">When a DeH Is Needed?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li16995141512115"><a href="deh_faq_0021.html">Can DeHs Be Used to Build Websites?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li17487417121119"><a href="deh_faq_0020.html">Can I DeHs by Myself?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li2961319101114"><a href="deh_faq_0005.html">Does Each DeH Have a Unique ID?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li198141639123619"><a href="deh_faq_0009.html">How Can I Query the Number of Available Resources on a DeH?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li18940132113117"><a href="deh_faq_0013.html">What Are the Restrictions on Creating ECSs on a DeH?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li41271524161116"><a href="deh_faq_0014.html">Can I Create ECSs of Different Flavors on a DeH?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li1611226101117"><a href="deh_faq_0015.html">Can I Modify Specifications of ECSs on DeHs?</a></li><li id="EN-US_TOPIC_0047250587__deh_12_0005_li1938332911814"><a href="deh_faq_0004.html">What Should I Do If I Fail to Create an ECS on a DeH?</a></li></ul>
<p id="EN-US_TOPIC_0047250587__p1312161013175">Modified:</p>
<ul id="EN-US_TOPIC_0047250587__ul144966473512"><li id="EN-US_TOPIC_0047250587__li0496154715518">Added the billing item comparison in <a href="deh_01_0027.html">Comparisons Between ECSs in Resource Pools and ECSs on DeHs</a>.</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0047250587__row118947324015"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0047250587__p289511354013">2022-10-26</p>
@ -136,7 +155,7 @@
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0047250587__p1344281315115">This issue is the fifth official release.</p>
<p id="EN-US_TOPIC_0047250587__p296005565313">Modified the following content:</p>
<ul id="EN-US_TOPIC_0047250587__ul8960185517535"><li id="EN-US_TOPIC_0047250587__li79603551537">Added six ECS flavors supported by high-performance DeHs in <a href="deh_01_0053.html">High-Performance DeHs</a>.</li><li id="EN-US_TOPIC_0047250587__li6960125585314">Added a restriction, that is, <strong id="EN-US_TOPIC_0047250587__b842352706144511">Automatic recovery of ECSs created on DeHs is not supported</strong> in <a href="deh_01_0010.html">Constraints</a>.</li></ul>
<ul id="EN-US_TOPIC_0047250587__ul8960185517535"><li id="EN-US_TOPIC_0047250587__li79603551537">Added six ECS specifications supported by high-performance DeHs in section <strong id="EN-US_TOPIC_0047250587__b1928105219251">High-Performance DeHs</strong> (out of production).</li><li id="EN-US_TOPIC_0047250587__li6960125585314">Added a restriction, that is, <strong id="EN-US_TOPIC_0047250587__b842352706144511">Automatic recovery of ECSs created on DeHs is not supported</strong> in <a href="deh_01_0010.html">Constraints</a>.</li></ul>
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</tr>
<tr id="EN-US_TOPIC_0047250587__row189606552531"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0047250587__p6960175517534">2017-07-30</p>