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doc-exports/docs/ecs/umn/en-us_topic_0038024694.html
wanghuijuan738 8f01f116a5 ECS UMN 20260514 version. Added X1m instance specifications. 
Reviewed-by: Pristromskaia, Margarita <margarita.pristromskaia@t-systems.com>
Co-authored-by: wanghuijuan738 <wanghuijuan738@huawei.com>
Co-committed-by: wanghuijuan738 <wanghuijuan738@huawei.com>
2026-05-18 09:03:42 +00:00

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<a name="EN-US_TOPIC_0038024694"></a><a name="EN-US_TOPIC_0038024694"></a>
<h1 class="topictitle1">Large-Memory ECSs</h1>
<div id="body1474336784369"><div class="section" id="EN-US_TOPIC_0038024694__section25374905172644"><h4 class="sectiontitle">Overview</h4><p id="EN-US_TOPIC_0038024694__p29697875172646">Large-memory ECSs provide an even larger amount of memory than memory-optimized ECSs. They are used for applications that require a large amount of memory, rapid data exchange and processing, low latency, and capability of processing large volumes of data. Large-memory ECSs provide large memory and high computing, storage, and network performance.</p>
<ul id="EN-US_TOPIC_0038024694__ul4988641132914"><li id="EN-US_TOPIC_0038024694__li1198964122919">Features<p id="EN-US_TOPIC_0038024694__p4989104110296"><a name="EN-US_TOPIC_0038024694__li1198964122919"></a><a name="li1198964122919"></a>The applications are for large-scale, enterprise-class, in-memory applications, process large volumes of data, and require rapid data switching, processing and low latency storage resource.</p>
</li><li id="EN-US_TOPIC_0038024694__li199896412293">Scenarios<p id="EN-US_TOPIC_0038024694__p789411216236"><a name="EN-US_TOPIC_0038024694__li199896412293"></a><a name="li199896412293"></a>OLTP and OLAP scenarios</p>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0038024694__section60740876172648"><h4 class="sectiontitle">Specifications</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0038024694__table374940131917" frame="border" border="1" rules="all"><caption><b>Table 1 </b>E6 ECS specifications</caption><thead align="left"><tr id="EN-US_TOPIC_0038024694__row1975030101914"><th align="left" class="cellrowborder" valign="top" width="12.000000000000002%" id="mcps1.3.2.2.2.10.1.1"><p id="EN-US_TOPIC_0038024694__p127502016199">Flavor</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="9.860000000000001%" id="mcps1.3.2.2.2.10.1.2"><p id="EN-US_TOPIC_0038024694__p97501203197">vCPUs</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="14.140000000000002%" id="mcps1.3.2.2.2.10.1.3"><p id="EN-US_TOPIC_0038024694__p99310488407">Memory</p>
<p id="EN-US_TOPIC_0038024694__p1775080131912">(GiB)</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="14.000000000000004%" id="mcps1.3.2.2.2.10.1.4"><p id="EN-US_TOPIC_0038024694__p773074924017">Max./Assured Network Bandwidth</p>
<p id="EN-US_TOPIC_0038024694__p37511602197">(Gbit/s)</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="15.000000000000002%" id="mcps1.3.2.2.2.10.1.5"><p id="EN-US_TOPIC_0038024694__p775110171920">Max. Network PPS</p>
<p id="EN-US_TOPIC_0038024694__p580515310237">(10,000)</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="8.000000000000002%" id="mcps1.3.2.2.2.10.1.6"><p id="EN-US_TOPIC_0038024694__p77516021910">Max. NIC Queues</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="8.000000000000002%" id="mcps1.3.2.2.2.10.1.7"><p id="EN-US_TOPIC_0038024694__p1875119012190">Max. NICs</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="9.000000000000002%" id="mcps1.3.2.2.2.10.1.8"><p id="EN-US_TOPIC_0038024694__p675160121915">Virtualization</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="10.000000000000002%" id="mcps1.3.2.2.2.10.1.9"><p id="EN-US_TOPIC_0038024694__p15204224607">Hardware</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0038024694__row575120018193"><td class="cellrowborder" valign="top" width="12.000000000000002%" headers="mcps1.3.2.2.2.10.1.1 "><p id="EN-US_TOPIC_0038024694__p17511901190">e6.26xlarge.28</p>
</td>
<td class="cellrowborder" valign="top" width="9.860000000000001%" headers="mcps1.3.2.2.2.10.1.2 "><p id="EN-US_TOPIC_0038024694__p775118010192">104</p>
</td>
<td class="cellrowborder" valign="top" width="14.140000000000002%" headers="mcps1.3.2.2.2.10.1.3 "><p id="EN-US_TOPIC_0038024694__p157519031911">2,948</p>
</td>
<td class="cellrowborder" valign="top" width="14.000000000000004%" headers="mcps1.3.2.2.2.10.1.4 "><p id="EN-US_TOPIC_0038024694__p175140181919">30/20</p>
</td>
<td class="cellrowborder" valign="top" width="15.000000000000002%" headers="mcps1.3.2.2.2.10.1.5 "><p id="EN-US_TOPIC_0038024694__p075118016194">550</p>
</td>
<td class="cellrowborder" valign="top" width="8.000000000000002%" headers="mcps1.3.2.2.2.10.1.6 "><p id="EN-US_TOPIC_0038024694__p17512002196">16</p>
</td>
<td class="cellrowborder" valign="top" width="8.000000000000002%" headers="mcps1.3.2.2.2.10.1.7 "><p id="EN-US_TOPIC_0038024694__p107518001920">8</p>
</td>
<td class="cellrowborder" valign="top" width="9.000000000000002%" headers="mcps1.3.2.2.2.10.1.8 "><p id="EN-US_TOPIC_0038024694__p375110041912">KVM</p>
</td>
<td class="cellrowborder" rowspan="2" valign="top" width="10.000000000000002%" headers="mcps1.3.2.2.2.10.1.9 "><p id="EN-US_TOPIC_0038024694__p819012334016">CPU: Intel&reg; Xeon&reg; Skylake 8280</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row875118018197"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.1 "><p id="EN-US_TOPIC_0038024694__p14751100101919">e6.52xlarge.28</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.2 "><p id="EN-US_TOPIC_0038024694__p1751708197">208</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.3 "><p id="EN-US_TOPIC_0038024694__p6751190101916">5,896</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.4 "><p id="EN-US_TOPIC_0038024694__p1175114081912">40/40</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.5 "><p id="EN-US_TOPIC_0038024694__p187517018192">1,000</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.6 "><p id="EN-US_TOPIC_0038024694__p1975130171913">32</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.7 "><p id="EN-US_TOPIC_0038024694__p2075217011197">8</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.2.10.1.8 "><p id="EN-US_TOPIC_0038024694__p187521608191">KVM</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0038024694__table2918193115615" frame="border" border="1" rules="all"><caption><b>Table 2 </b>E3 ECS specifications</caption><thead align="left"><tr id="EN-US_TOPIC_0038024694__row59341131185617"><th align="left" class="cellrowborder" valign="top" width="12.000000000000002%" id="mcps1.3.2.3.2.10.1.1"><p id="EN-US_TOPIC_0038024694__p1893453117564">Flavor</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="10.110000000000001%" id="mcps1.3.2.3.2.10.1.2"><p id="EN-US_TOPIC_0038024694__p15934431195619">vCPUs</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="13.890000000000002%" id="mcps1.3.2.3.2.10.1.3"><p id="EN-US_TOPIC_0038024694__p86471357114018">Memory</p>
<p id="EN-US_TOPIC_0038024694__p12934831145619">(GiB)</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="14.000000000000004%" id="mcps1.3.2.3.2.10.1.4"><p id="EN-US_TOPIC_0038024694__p213017594407">Max./Assured Network Bandwidth</p>
<p id="EN-US_TOPIC_0038024694__p1973293135819">(Gbit/s)</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="15.000000000000002%" id="mcps1.3.2.3.2.10.1.5"><p id="EN-US_TOPIC_0038024694__p16797140134118">Max. Network PPS</p>
<p id="EN-US_TOPIC_0038024694__p973253111589">(10,000)</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="8.000000000000002%" id="mcps1.3.2.3.2.10.1.6"><p id="EN-US_TOPIC_0038024694__p573223115812">Max. NIC Queues</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="8.000000000000002%" id="mcps1.3.2.3.2.10.1.7"><p id="EN-US_TOPIC_0038024694__p1397713121056">Max. NICs</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="9.000000000000002%" id="mcps1.3.2.3.2.10.1.8"><p id="EN-US_TOPIC_0038024694__p295010312569">Virtualization</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="10.000000000000002%" id="mcps1.3.2.3.2.10.1.9"><p id="EN-US_TOPIC_0038024694__p16814117176">Hardware</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0038024694__row20950173118568"><td class="cellrowborder" valign="top" width="12.000000000000002%" headers="mcps1.3.2.3.2.10.1.1 "><p id="EN-US_TOPIC_0038024694__p12121114275619">e3.7xlarge.12</p>
</td>
<td class="cellrowborder" valign="top" width="10.110000000000001%" headers="mcps1.3.2.3.2.10.1.2 "><p id="EN-US_TOPIC_0038024694__p61211642115615">28</p>
</td>
<td class="cellrowborder" valign="top" width="13.890000000000002%" headers="mcps1.3.2.3.2.10.1.3 "><p id="EN-US_TOPIC_0038024694__p12121104210561">348</p>
</td>
<td class="cellrowborder" valign="top" width="14.000000000000004%" headers="mcps1.3.2.3.2.10.1.4 "><p id="EN-US_TOPIC_0038024694__p349657155120">25/12</p>
</td>
<td class="cellrowborder" valign="top" width="15.000000000000002%" headers="mcps1.3.2.3.2.10.1.5 "><p id="EN-US_TOPIC_0038024694__p485369165112">280</p>
</td>
<td class="cellrowborder" valign="top" width="8.000000000000002%" headers="mcps1.3.2.3.2.10.1.6 "><p id="EN-US_TOPIC_0038024694__p12828611195118">8</p>
</td>
<td class="cellrowborder" valign="top" width="8.000000000000002%" headers="mcps1.3.2.3.2.10.1.7 "><p id="EN-US_TOPIC_0038024694__p1297716121357">8</p>
</td>
<td class="cellrowborder" valign="top" width="9.000000000000002%" headers="mcps1.3.2.3.2.10.1.8 "><p id="EN-US_TOPIC_0038024694__p4965113125613">KVM</p>
</td>
<td class="cellrowborder" rowspan="2" valign="top" width="10.000000000000002%" headers="mcps1.3.2.3.2.10.1.9 "><p id="EN-US_TOPIC_0038024694__p10435165763513">CPU: Intel&reg; Xeon&reg; Skylake 6151</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row12965183185612"><td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.1 "><p id="EN-US_TOPIC_0038024694__p910624219569">e3.14xlarge.12</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.2 "><p id="EN-US_TOPIC_0038024694__p1512144210561">56</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.3 "><p id="EN-US_TOPIC_0038024694__p5121104218565">696</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.4 "><p id="EN-US_TOPIC_0038024694__p1049610775120">25/25</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.5 "><p id="EN-US_TOPIC_0038024694__p1885329145117">500</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.6 "><p id="EN-US_TOPIC_0038024694__p282816119516">16</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.7 "><p id="EN-US_TOPIC_0038024694__p109779124515">8</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.8 "><p id="EN-US_TOPIC_0038024694__p10391185819564">KVM</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row898213117569"><td class="cellrowborder" valign="top" width="12.000000000000002%" headers="mcps1.3.2.3.2.10.1.1 "><p id="EN-US_TOPIC_0038024694__p191061942115611">e3.26xlarge.14</p>
</td>
<td class="cellrowborder" valign="top" width="10.110000000000001%" headers="mcps1.3.2.3.2.10.1.2 "><p id="EN-US_TOPIC_0038024694__p16106144215561">104</p>
</td>
<td class="cellrowborder" valign="top" width="13.890000000000002%" headers="mcps1.3.2.3.2.10.1.3 "><p id="EN-US_TOPIC_0038024694__p910614427568">1,466</p>
</td>
<td class="cellrowborder" valign="top" width="14.000000000000004%" headers="mcps1.3.2.3.2.10.1.4 "><p id="EN-US_TOPIC_0038024694__p249616719513">30/20</p>
</td>
<td class="cellrowborder" valign="top" width="15.000000000000002%" headers="mcps1.3.2.3.2.10.1.5 "><p id="EN-US_TOPIC_0038024694__p68531596518">550</p>
</td>
<td class="cellrowborder" valign="top" width="8.000000000000002%" headers="mcps1.3.2.3.2.10.1.6 "><p id="EN-US_TOPIC_0038024694__p1382891185114">16</p>
</td>
<td class="cellrowborder" valign="top" width="8.000000000000002%" headers="mcps1.3.2.3.2.10.1.7 "><p id="EN-US_TOPIC_0038024694__p497713121559">8</p>
</td>
<td class="cellrowborder" valign="top" width="9.000000000000002%" headers="mcps1.3.2.3.2.10.1.8 "><p id="EN-US_TOPIC_0038024694__p3391175819564">KVM</p>
</td>
<td class="cellrowborder" rowspan="2" valign="top" width="10.000000000000002%" headers="mcps1.3.2.3.2.10.1.9 "><p id="EN-US_TOPIC_0038024694__p149381261363">CPU: Intel&reg; Xeon&reg; Skylake 8176</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row10997531205616"><td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.1 "><p id="EN-US_TOPIC_0038024694__p8106154265611">e3.52xlarge.14</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.2 "><p id="EN-US_TOPIC_0038024694__p710684217569">208</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.3 "><p id="EN-US_TOPIC_0038024694__p11106442205613">2,932</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.4 "><p id="EN-US_TOPIC_0038024694__p1449611725120">40/40</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.5 "><p id="EN-US_TOPIC_0038024694__p185349155114">1,000</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.6 "><p id="EN-US_TOPIC_0038024694__p108281811105116">32</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.7 "><p id="EN-US_TOPIC_0038024694__p297731219519">8</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.3.2.10.1.8 "><p id="EN-US_TOPIC_0038024694__p19407858175618">KVM</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0038024694__section3320087010555"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0038024694__ul60134958151326"><li id="EN-US_TOPIC_0038024694__li15923502151326">Large-memory ECSs do not support NIC hot swapping.</li><li id="EN-US_TOPIC_0038024694__li19725101343710">Specifications of large-memory ECSs can be modified only within the same flavor family.</li><li id="EN-US_TOPIC_0038024694__li158602374376">Affected by the memory loading speed, large-memory ECSs may take longer to start.</li><li id="EN-US_TOPIC_0038024694__li135761401879"><a href="#EN-US_TOPIC_0038024694__table192771727112217">Table 3</a> lists the OSs supported by large-memory ECSs.
<div class="tablenoborder"><a name="EN-US_TOPIC_0038024694__table192771727112217"></a><a name="table192771727112217"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0038024694__table192771727112217" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Supported OS versions</caption><thead align="left"><tr id="EN-US_TOPIC_0038024694__row11278327192211"><th align="left" class="cellrowborder" valign="top" width="49.95%" id="mcps1.3.3.2.4.2.2.3.1.1"><p id="EN-US_TOPIC_0038024694__p19278162716225">OS</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="50.05%" id="mcps1.3.3.2.4.2.2.3.1.2"><p id="EN-US_TOPIC_0038024694__p8278112752216">Version</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0038024694__row13431145812228"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p19431758122216">CentOS</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul11886112172516"><li id="EN-US_TOPIC_0038024694__li91963716214">CentOS 8.5 64bit</li><li id="EN-US_TOPIC_0038024694__li17981545824">CentOS 8.4 64bit</li><li id="EN-US_TOPIC_0038024694__li598215451122">CentOS 8.3 64bit</li><li id="EN-US_TOPIC_0038024694__li19982445023">CentOS 8.2 64bit</li><li id="EN-US_TOPIC_0038024694__li209821345522">CentOS 8.1 64bit</li><li id="EN-US_TOPIC_0038024694__li588621215252">CentOS 7.9 64bit</li><li id="EN-US_TOPIC_0038024694__li1788610127259">CentOS 7.7 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row1943125882219"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p14432145812222">EulerOS</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul196736181530"><li id="EN-US_TOPIC_0038024694__li667312183313">EulerOS 2.12 64bit</li><li id="EN-US_TOPIC_0038024694__li166731187319">EulerOS 2.11 64bit</li><li id="EN-US_TOPIC_0038024694__li667312181317">EulerOS 2.10 64bit</li><li id="EN-US_TOPIC_0038024694__li567319181038">EulerOS 2.8 64bit</li><li id="EN-US_TOPIC_0038024694__li4673218338">EulerOS 2.7 64bit</li><li id="EN-US_TOPIC_0038024694__li367391818315">EulerOS 2.5 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row1545125312221"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p135451953192219">Fedora</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul1663413714279"><li id="EN-US_TOPIC_0038024694__li116342711278">Fedora 39 64bit</li><li id="EN-US_TOPIC_0038024694__li178105432320">Fedora 38 64bit</li><li id="EN-US_TOPIC_0038024694__li281111431637">Fedora 37 64bit</li><li id="EN-US_TOPIC_0038024694__li281274312319">Fedora 36 64bit</li><li id="EN-US_TOPIC_0038024694__li6812144318319">Fedora 35 64bit</li><li id="EN-US_TOPIC_0038024694__li381318437312">Fedora 34 64bit</li><li id="EN-US_TOPIC_0038024694__li48141343239">Fedora 33 64bit</li><li id="EN-US_TOPIC_0038024694__li1381413431033">Fedora 32 64bit</li><li id="EN-US_TOPIC_0038024694__li68151043736">Fedora 31 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row95451253192217"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p1254585312228">OpenSUSE</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul113521201659"><li id="EN-US_TOPIC_0038024694__li133521501954">OpenSUSE 15.5 64bit</li><li id="EN-US_TOPIC_0038024694__li9352201551">OpenSUSE 15.4 64bit</li><li id="EN-US_TOPIC_0038024694__li63531101153">OpenSUSE 15.3 64bit</li><li id="EN-US_TOPIC_0038024694__li73532016516">OpenSUSE 15.2 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row14278152732214"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p8278427162219">Oracle Linux</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul33191534203710"><li id="EN-US_TOPIC_0038024694__li0319123412374">Oracle Linux Server release 8.4 64bit</li><li id="EN-US_TOPIC_0038024694__li0319134173710">Oracle Linux Server release 7.6 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row1527810278221"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p327810276226">Red Hat</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul88439531159"><li id="EN-US_TOPIC_0038024694__li88441853056">Red Hat Enterprise Linux 9.1 64bit</li><li id="EN-US_TOPIC_0038024694__li484410533516">Red Hat Enterprise Linux 9.0 64bit</li><li id="EN-US_TOPIC_0038024694__li1884405320511">Red Hat Enterprise Linux 8.7 64bit</li><li id="EN-US_TOPIC_0038024694__li88447531451">Red Hat Enterprise Linux 8.6 64bit</li><li id="EN-US_TOPIC_0038024694__li484415311518">Red Hat Enterprise Linux 8.5 64bit</li><li id="EN-US_TOPIC_0038024694__li484418531751">Red Hat Enterprise Linux 8.4 64bit</li><li id="EN-US_TOPIC_0038024694__li68443538518">Red Hat Enterprise Linux 8.3 64bit</li><li id="EN-US_TOPIC_0038024694__li18441453153">Red Hat Enterprise Linux 8.2 64bit</li><li id="EN-US_TOPIC_0038024694__li7844653253">Red Hat Enterprise Linux 8.1 64bit</li><li id="EN-US_TOPIC_0038024694__li158442053858">Red Hat Enterprise Linux 7.9 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row11181357124218"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p201183573428">SUSE</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul1481316019461"><li id="EN-US_TOPIC_0038024694__li481315004611">Novell SUSE Linux Enterprise Server 15 SP5 64bit</li><li id="EN-US_TOPIC_0038024694__li168531311568">Novell SUSE Linux Enterprise Server 15 SP4 64bit</li><li id="EN-US_TOPIC_0038024694__li9290171314618">Novell SUSE Linux Enterprise Server 15 SP3 64bit</li><li id="EN-US_TOPIC_0038024694__li14813150174617">Novell SUSE Linux Enterprise Server 15 SP2 64bit</li><li id="EN-US_TOPIC_0038024694__li781310014468">Novell SUSE Linux Enterprise Server 15 SP1 64bit</li><li id="EN-US_TOPIC_0038024694__li12813608462">Novell SUSE Linux Enterprise Server 15 64bit</li><li id="EN-US_TOPIC_0038024694__li0813100154611">Novell SUSE Linux Enterprise Server 12 SP5 64bit</li><li id="EN-US_TOPIC_0038024694__li108137094617">Novell SUSE Linux Enterprise Server 12 SP4 64bit</li><li id="EN-US_TOPIC_0038024694__li1381311014620">Novell SUSE Linux Enterprise Server 12 SP3 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row19191332431"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p919339435">Ubuntu</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul84311137135311"><li id="EN-US_TOPIC_0038024694__li1413615350616">Ubuntu 22.04 server 64bit</li><li id="EN-US_TOPIC_0038024694__li8431037145317">Ubuntu 20.04 server 64bit</li><li id="EN-US_TOPIC_0038024694__li17431163712537">Ubuntu 18.04 server 64bit</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row165275718436"><td class="cellrowborder" valign="top" width="49.95%" headers="mcps1.3.3.2.4.2.2.3.1.1 "><p id="EN-US_TOPIC_0038024694__p20527147124315">Windows</p>
</td>
<td class="cellrowborder" valign="top" width="50.05%" headers="mcps1.3.3.2.4.2.2.3.1.2 "><ul id="EN-US_TOPIC_0038024694__ul4285643165519"><li id="EN-US_TOPIC_0038024694__li115595191673">Windows Server 2022 Standard 64bit</li><li id="EN-US_TOPIC_0038024694__li11561519179">Windows Server 2022 Datacenter 64bit</li><li id="EN-US_TOPIC_0038024694__li13285124365519">Windows Server 2019 Standard 64bit</li><li id="EN-US_TOPIC_0038024694__li192811029276">Windows Server 2019 Datacenter 64bit</li><li id="EN-US_TOPIC_0038024694__li18285543195516">Windows Server 2016 Standard 64bit</li><li id="EN-US_TOPIC_0038024694__li15285443125511">Windows Server 2012 R2 Standard 64bit</li></ul>
</td>
</tr>
</tbody>
</table>
</div>
</li><li id="EN-US_TOPIC_0038024694__li38571445194212">Large-memory ECSs can use ultra-high I/O EVS disks as the system disk and data disks.</li><li id="EN-US_TOPIC_0038024694__li14785230151326">The primary and extension NICs of a large-memory ECS can only be used in the scenarios listed in <a href="#EN-US_TOPIC_0038024694__table1642803151326">Table 4</a>.
<div class="tablenoborder"><a name="EN-US_TOPIC_0038024694__table1642803151326"></a><a name="table1642803151326"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0038024694__table1642803151326" frame="border" border="1" rules="all"><caption><b>Table 4 </b>Application scenarios of the NICs of a large-memory ECS</caption><thead align="left"><tr id="EN-US_TOPIC_0038024694__row7839896151326"><th align="left" class="cellrowborder" valign="top" width="19.61%" id="mcps1.3.3.2.6.2.2.4.1.1"><p id="EN-US_TOPIC_0038024694__p14196851151326">NIC Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="34.089999999999996%" id="mcps1.3.3.2.6.2.2.4.1.2"><p id="EN-US_TOPIC_0038024694__p9094287151326">Application Scenario</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="46.300000000000004%" id="mcps1.3.3.2.6.2.2.4.1.3"><p id="EN-US_TOPIC_0038024694__p65548643151326">Remarks</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0038024694__row28810193151326"><td class="cellrowborder" valign="top" width="19.61%" headers="mcps1.3.3.2.6.2.2.4.1.1 "><p id="EN-US_TOPIC_0038024694__p31051862151326">Primary NIC</p>
</td>
<td class="cellrowborder" valign="top" width="34.089999999999996%" headers="mcps1.3.3.2.6.2.2.4.1.2 "><p id="EN-US_TOPIC_0038024694__p32172868151326">Vertical layer 3 communication</p>
</td>
<td class="cellrowborder" valign="top" width="46.300000000000004%" headers="mcps1.3.3.2.6.2.2.4.1.3 "><p id="EN-US_TOPIC_0038024694__p55865482151326">N/A</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0038024694__row7550850151326"><td class="cellrowborder" valign="top" width="19.61%" headers="mcps1.3.3.2.6.2.2.4.1.1 "><p id="EN-US_TOPIC_0038024694__p57965148151326">Extension NIC</p>
</td>
<td class="cellrowborder" valign="top" width="34.089999999999996%" headers="mcps1.3.3.2.6.2.2.4.1.2 "><p id="EN-US_TOPIC_0038024694__p64665415151326">Horizontal layer 2 communication</p>
</td>
<td class="cellrowborder" valign="top" width="46.300000000000004%" headers="mcps1.3.3.2.6.2.2.4.1.3 "><p id="EN-US_TOPIC_0038024694__p3407238151326">To improve network performance, you can set the MTU of an extension NIC to <strong id="EN-US_TOPIC_0038024694__b84235270612277">8888</strong>.</p>
</td>
</tr>
</tbody>
</table>
</div>
</li><li id="EN-US_TOPIC_0038024694__li36507823151326">An ECS can have a maximum of 60 attached disks, including the system disk. For details about constraints, see <a href="en-us_topic_0018073215.html">Can I Attach Multiple Disks to an ECS?</a><p id="EN-US_TOPIC_0038024694__p65958213151326">For example, an E3 ECS can have one system disk and 59 data disks.</p>
</li></ul>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0132345719.html">ECS Specifications</a></div>
</div>
</div>
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