forked from docs/doc-exports
ELB_UMN_0927
Reviewed-by: Hajba, László Antal <laszlo-antal.hajba@t-systems.com> Co-authored-by: zhoumeng <zhoumeng35@huawei.com> Co-committed-by: zhoumeng <zhoumeng35@huawei.com>
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"node_id":"en-us_topic_0287737145.xml",
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"node_id":"en-us_topic_0287737145.xml",
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"product_code":"elb",
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"product_code":"elb",
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"code":"9",
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"code":"9",
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"des":"Load balancers are available in different specifications. Choose the specifications that best meet your needs. If the traffic exceeds the selected specifications, new req",
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"des":"When you create a dedicated load balancer, you can select elastic or fixed specifications based on your service requirements. Table 1 compares the two types of specificat",
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"kw":"Specifications of Dedicated Load Balancers,Service Overview,User Guide",
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"title":"Specifications of Dedicated Load Balancers",
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"title":"Specifications of Dedicated Load Balancers",
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"code":"8"
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{
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"desc":"Load balancers are available in different specifications. Choose the specifications that best meet your needs. If the traffic exceeds the selected specifications, new req",
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"desc":"When you create a dedicated load balancer, you can select elastic or fixed specifications based on your service requirements. Table 1 compares the two types of specificat",
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"product_code":"elb",
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"title":"Specifications of Dedicated Load Balancers",
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"title":"Specifications of Dedicated Load Balancers",
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"uri":"en-us_topic_0287737145.html",
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<td class="cellrowborder" valign="top" width="26.85%" headers="mcps1.3.4.2.4.4.2.4.1.3 "><p id="elb_lb_000006__p13621114119465">-</p>
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<td class="cellrowborder" valign="top" width="26.85%" headers="mcps1.3.4.2.4.4.2.4.1.3 "><p id="elb_lb_000006__p13621114119465">-</p>
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</td>
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</td>
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</tr>
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</tr>
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<tr id="elb_lb_000006__row9570132619317"><td class="cellrowborder" valign="top" width="18.57%" headers="mcps1.3.4.2.4.4.2.4.1.1 "><p id="elb_lb_000006__p1887818291310">Specifications</p>
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<tr id="elb_lb_000006__row456013527282"><td class="cellrowborder" valign="top" width="18.57%" headers="mcps1.3.4.2.4.4.2.4.1.1 "><p id="elb_lb_000006__p260383104414">Specifications</p>
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</td>
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</td>
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<td class="cellrowborder" valign="top" width="54.58%" headers="mcps1.3.4.2.4.4.2.4.1.2 "><ul id="elb_lb_000006__ul1487820297311"><li id="elb_lb_000006__li158781829123115">Select either <strong id="elb_lb_000006__b1289435313549">Application load balancing (HTTP/HTTPS)</strong> or <strong id="elb_lb_000006__b2894135317546">Network load balancing (TCP/UDP)</strong> or both, and then select the desired specification. You can select only one specification for <strong id="elb_lb_000006__b118941153125418">Application load balancing (HTTP/HTTPS)</strong> and <strong id="elb_lb_000006__b1689535320540">Network load balancing (TCP/UDP)</strong>, respectively. Select the desired specifications based on your service plan by referring to <a href="en-us_topic_0287737145.html">Specifications of Dedicated Load Balancers</a>.</li><li id="elb_lb_000006__li0878102915312">For application load balancing, the number of IP addresses varies depending on the specification. You can view the number of IP addresses required by the load balancer in the advanced settings.</li><li id="elb_lb_000006__li158781297313">The performance of load balancers varies depending on the selected specifications. You can evaluate the actual traffic and select appropriate specifications based on the key metrics.</li></ul>
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<td class="cellrowborder" valign="top" width="54.58%" headers="mcps1.3.4.2.4.4.2.4.1.2 "><p id="elb_lb_000006__p136032039448">Select <strong id="elb_lb_000006__b196473149361">Elastic</strong> or <strong id="elb_lb_000006__b12648414193612">Fixed</strong>.</p>
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<ul id="elb_lb_000006__ul1960383154417"><li id="elb_lb_000006__li360303104418">Elastic specifications work well for fluctuating traffic, and you will be charged for how many LCUs you use.</li><li id="elb_lb_000006__li156032304419">Fixed specifications are suitable for stable traffic, and you will be charged for the specifications you select.</li></ul>
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<p id="elb_lb_000006__p186032364410">Select either <strong id="elb_lb_000006__b542612413913">Application load balancing (HTTP/HTTPS)</strong> or <strong id="elb_lb_000006__b542732415392">Network load balancing (TCP/UDP)</strong> or both, and then select the desired specification. You can select only one specification for <strong id="elb_lb_000006__b1642772413910">Application load balancing (HTTP/HTTPS)</strong> and <strong id="elb_lb_000006__b1542972418391">Network load balancing (TCP/UDP)</strong>, respectively. Select the desired specifications based on your service size by referring to <a href="en-us_topic_0287737145.html">Specifications of Dedicated Load Balancers</a>.</p>
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</td>
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</td>
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<td class="cellrowborder" valign="top" width="26.85%" headers="mcps1.3.4.2.4.4.2.4.1.3 "><p id="elb_lb_000006__p17879192913117">Medium II</p>
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<td class="cellrowborder" valign="top" width="26.85%" headers="mcps1.3.4.2.4.4.2.4.1.3 "><p id="elb_lb_000006__p19561185217285">Elastic</p>
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</td>
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</tr>
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</tr>
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<tr id="elb_lb_000006__row1614119381326"><td class="cellrowborder" valign="top" width="18.57%" headers="mcps1.3.4.2.4.4.2.4.1.1 "><p id="elb_lb_000006__p12137438143214">Name</p>
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<tr id="elb_lb_000006__row1614119381326"><td class="cellrowborder" valign="top" width="18.57%" headers="mcps1.3.4.2.4.4.2.4.1.1 "><p id="elb_lb_000006__p12137438143214">Name</p>
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</th>
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</tr>
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</thead>
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</thead>
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<tbody><tr id="elb_ug_jl_0000__row2043045945217"><td class="cellrowborder" valign="top" width="28.599999999999998%" headers="mcps1.3.1.1.3.1.1 "><p id="elb_ug_jl_0000__p184301259185213">2024-08-30</p>
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<tbody><tr id="elb_ug_jl_0000__row84124411115"><td class="cellrowborder" valign="top" width="28.599999999999998%" headers="mcps1.3.1.1.3.1.1 "><p id="elb_ug_jl_0000__p14412442118">2024-09-26</p>
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</td>
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</td>
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<td class="cellrowborder" valign="top" width="71.39999999999999%" headers="mcps1.3.1.1.3.1.2 "><p id="elb_ug_jl_0000__p318914125417">Modified the following sections:</p>
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<td class="cellrowborder" valign="top" width="71.39999999999999%" headers="mcps1.3.1.1.3.1.2 "><p id="elb_ug_jl_0000__p16118102712115">Introduced elastic specifications for dedicated load balancers.</p>
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</td>
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</tr>
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<tr id="elb_ug_jl_0000__row2043045945217"><td class="cellrowborder" valign="top" width="28.599999999999998%" headers="mcps1.3.1.1.3.1.1 "><p id="elb_ug_jl_0000__p184301259185213">2024-08-30</p>
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</td>
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<td class="cellrowborder" valign="top" width="71.39999999999999%" headers="mcps1.3.1.1.3.1.2 "><p id="elb_ug_jl_0000__p318914125417">Modified the following content:</p>
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<ul id="elb_ug_jl_0000__ul197241048491"><li id="elb_ug_jl_0000__li1848634754612">An SNI certificate can have up to 100 domain names.</li><li id="elb_ug_jl_0000__li14181646205712">SNI certificates of a dedicated load balancer's listener can have up to 200 domain names.</li><li id="elb_ug_jl_0000__li18617193911113">SNI certificates of a shared load balancer's listener can have up to 30 domain names.</li></ul>
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<ul id="elb_ug_jl_0000__ul197241048491"><li id="elb_ug_jl_0000__li1848634754612">An SNI certificate can have up to 100 domain names.</li><li id="elb_ug_jl_0000__li14181646205712">SNI certificates of a dedicated load balancer's listener can have up to 200 domain names.</li><li id="elb_ug_jl_0000__li18617193911113">SNI certificates of a shared load balancer's listener can have up to 30 domain names.</li></ul>
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</td>
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</td>
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<div class="note" id="en-us_topic_0150301848__en-us_topic_0000001819164194_note18898177181519"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="en-us_topic_0150301848__ul8764172213270"><li id="en-us_topic_0150301848__li07641228274">ELB displays operations data, such as access logs, on the LTS console. Do not transmit private or sensitive data through fields in access logs. Encrypt your sensitive data if necessary.</li><li id="en-us_topic_0150301848__en-us_topic_0242751126_li0284142520492">Currently, access logging is not supported in the <strong id="en-us_topic_0150301848__b194981840183213">eu-nl</strong> region.</li></ul>
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<div class="note" id="en-us_topic_0150301848__en-us_topic_0000001819164194_note18898177181519"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="en-us_topic_0150301848__ul8764172213270"><li id="en-us_topic_0150301848__li07641228274">ELB displays operations data, such as access logs, on the LTS console. Do not transmit private or sensitive data through fields in access logs. Encrypt your sensitive data if necessary.</li><li id="en-us_topic_0150301848__en-us_topic_0242751126_li0284142520492">Currently, access logging is not supported in the <strong id="en-us_topic_0150301848__b194981840183213">eu-nl</strong> region.</li></ul>
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</div></div>
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</div></div>
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</div>
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</div>
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<div class="section" id="en-us_topic_0150301848__en-us_topic_0000001819164194_section97361345495"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="en-us_topic_0150301848__en-us_topic_0000001819164194_ul1713832394517"><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li6245142420456">Access logging can be configured only for application (Layer 7) load balancers.</li><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li101384231457">The access logs do not contain requests whose return code is <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b1684783318512">400 Bad Request</strong>. This is because such requests do not comply with HTTP specification and cannot be processed properly.</li></ul>
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<div class="section" id="en-us_topic_0150301848__en-us_topic_0000001819164194_section97361345495"><h4 class="sectiontitle">Constraints</h4><ul id="en-us_topic_0150301848__en-us_topic_0000001819164194_ul1713832394517"><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li6245142420456">Access logging can be configured only for load balancers that have HTTP or HTTPS listeners.</li><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li101384231457">The access logs do not contain requests whose return code is <strong id="en-us_topic_0150301848__b1019594117114">400 Bad Request</strong>. This is because such requests do not comply with HTTP specification and cannot be processed properly.</li></ul>
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</div>
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</div>
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<div class="section" id="en-us_topic_0150301848__en-us_topic_0000001819164194_section149451307410"><h4 class="sectiontitle">Prerequisites</h4><ul id="en-us_topic_0150301848__en-us_topic_0000001819164194_ul293120581331"><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li7931145863310">You have created a load balancer that can work at Layer 7. For details, see <a href="elb_lb_000006.html">Creating a Dedicated Load Balancer</a>.</li><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li8931195816335">You have enabled LTS.</li><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li19245184820406">You have created a backend server group, added backend servers to the group, and deployed services on the backend servers. For details, see <a href="elb_ug_hdg_0003.html">Creating a Backend Server Group (Dedicated Load Balancers)</a>.</li></ul>
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<div class="section" id="en-us_topic_0150301848__en-us_topic_0000001819164194_section149451307410"><h4 class="sectiontitle">Prerequisites</h4><ul id="en-us_topic_0150301848__en-us_topic_0000001819164194_ul293120581331"><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li7931145863310">You have created a load balancer that can work at Layer 7. For details, see <a href="elb_lb_000006.html">Creating a Dedicated Load Balancer</a>.</li><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li8931195816335">You have enabled LTS.</li><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li19245184820406">You have created a backend server group, added backend servers to the group, and deployed services on the backend servers. For details, see <a href="elb_ug_hdg_0003.html">Creating a Backend Server Group (Dedicated Load Balancers)</a>.</li></ul>
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<ul id="en-us_topic_0150301848__en-us_topic_0000001819164194_ul7224205317319"><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li1022414531314">You have add an HTTP or HTTPS listener to the load balancer. For details, see <a href="elb_ug_jt_0008.html">Adding an HTTP Listener</a> or <a href="elb_ug_jt_0009.html">Adding an HTTPS Listener</a>.</li></ul>
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<ul id="en-us_topic_0150301848__en-us_topic_0000001819164194_ul7224205317319"><li id="en-us_topic_0150301848__en-us_topic_0000001819164194_li1022414531314">You have added an HTTP or HTTPS listener to the load balancer. For details, see <a href="elb_ug_jt_0008.html">Adding an HTTP Listener</a> or <a href="elb_ug_jt_0009.html">Adding an HTTPS Listener</a>.</li></ul>
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<div class="section" id="en-us_topic_0150301848__en-us_topic_0000001819164194_section1622913517361"><h4 class="sectiontitle">Flowchart</h4><div class="fignone" id="en-us_topic_0150301848__en-us_topic_0000001819164194_fig29281846298"><span class="figcap"><b>Figure 1 </b>Process for locating an unhealthy backend server</span><br><span><img id="en-us_topic_0150301848__en-us_topic_0000001819164194_image1292819460914" src="en-us_image_0000001908343850.png"></span></div>
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<div class="section" id="en-us_topic_0150301848__en-us_topic_0000001819164194_section1622913517361"><h4 class="sectiontitle">Flowchart</h4><div class="fignone" id="en-us_topic_0150301848__en-us_topic_0000001819164194_fig29281846298"><span class="figcap"><b>Figure 1 </b>Process for locating an unhealthy backend server</span><br><span><img id="en-us_topic_0150301848__en-us_topic_0000001819164194_image1292819460914" src="en-us_image_0000001908343850.png"></span></div>
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<tr id="en-us_topic_0150301848__en-us_topic_0000001819164194_row92078621515"><td class="cellrowborder" valign="top" width="25.045637093829864%" headers="mcps1.3.8.9.2.5.1.1 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p8575932162113">pool_name</p>
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<tr id="en-us_topic_0150301848__en-us_topic_0000001819164194_row92078621515"><td class="cellrowborder" valign="top" width="25.045637093829864%" headers="mcps1.3.8.9.2.5.1.1 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p8575932162113">pool_name</p>
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<td class="cellrowborder" valign="top" width="26.895460630400393%" headers="mcps1.3.8.9.2.5.1.2 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p757514327216">Backend server group name in the format of <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b383074199339">pool_</strong><em id="en-us_topic_0150301848__en-us_topic_0000001819164194_i2075329024339">backend server group ID</em></p>
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<td class="cellrowborder" valign="top" width="26.895460630400393%" headers="mcps1.3.8.9.2.5.1.2 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p757514327216">Backend server group name in the format of <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b12145945104019">pool_</strong><em id="en-us_topic_0150301848__en-us_topic_0000001819164194_i165991616174115">backend server group ID</em> or <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b132861329164117">pool_</strong><em id="en-us_topic_0150301848__en-us_topic_0000001819164194_i158564517419">backend server group ID</em><strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b141612415422">*</strong><em id="en-us_topic_0150301848__en-us_topic_0000001819164194_i158291058114116">load balancer ID</em>.</p>
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<td class="cellrowborder" valign="top" width="24.960447852014116%" headers="mcps1.3.8.9.2.5.1.3 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p137521589911">String</p>
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<td class="cellrowborder" valign="top" width="24.960447852014116%" headers="mcps1.3.8.9.2.5.1.3 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p137521589911">String</p>
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<tr id="en-us_topic_0150301848__en-us_topic_0000001819164194_row889411386150"><td class="cellrowborder" valign="top" width="25.045637093829864%" headers="mcps1.3.8.9.2.5.1.1 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p19575173292113">member_name</p>
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<tr id="en-us_topic_0150301848__en-us_topic_0000001819164194_row889411386150"><td class="cellrowborder" valign="top" width="25.045637093829864%" headers="mcps1.3.8.9.2.5.1.1 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p19575173292113">member_name</p>
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<td class="cellrowborder" valign="top" width="26.895460630400393%" headers="mcps1.3.8.9.2.5.1.2 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p95751332192114">Backend server name in the format of <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b2118246899339">member_</strong><em id="en-us_topic_0150301848__en-us_topic_0000001819164194_i107682375339">server ID</em>. This field is not supported yet. There may be multiple values separated by commas and spaces, and the value can be <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b32110778339">member_id</strong>) or <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b1937982816339">-</strong>.</p>
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<td class="cellrowborder" valign="top" width="26.895460630400393%" headers="mcps1.3.8.9.2.5.1.2 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p95751332192114">Backend server name in the format of <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b2118246899339">member_</strong><em id="en-us_topic_0150301848__en-us_topic_0000001819164194_i107682375339">server ID</em>. This field is not supported yet. There may be multiple values separated by commas and spaces, and each value is a member ID (<strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b018942451418">member_id</strong>) or <strong id="en-us_topic_0150301848__en-us_topic_0000001819164194_b5191122415142">-</strong>.</p>
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<td class="cellrowborder" valign="top" width="24.960447852014116%" headers="mcps1.3.8.9.2.5.1.3 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p17753981293">String</p>
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<td class="cellrowborder" valign="top" width="24.960447852014116%" headers="mcps1.3.8.9.2.5.1.3 "><p id="en-us_topic_0150301848__en-us_topic_0000001819164194_p17753981293">String</p>
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