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Reviewed-by: Wagner, Fabian <fabian.wagner@t-systems.com> Co-authored-by: wangdengke2 <wangdengke2@huawei.com> Co-committed-by: wangdengke2 <wangdengke2@huawei.com>
66 lines
5.2 KiB
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66 lines
5.2 KiB
HTML
<a name="rds_01_0020"></a><a name="rds_01_0020"></a>
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<h1 class="topictitle1">DB Instance Storage Types</h1>
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<div id="body1572250937727"><p id="rds_01_0020__p141541598377">The database system is generally an important part of an IT system and has high requirements on storage I/O performance. You can select a storage type based on service demands. You cannot change the storage type after the DB instance is created.</p>
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<div class="section" id="rds_01_0020__section19617114611142"><h4 class="sectiontitle">Description</h4><p id="rds_01_0020__p15502173814215">RDS supports <strong id="rds_01_0020__b19431182655313">Cloud SSD and </strong><strong id="rds_01_0020__b1634810413416">Extreme SSD</strong> to suit different performance requirements of your workloads.</p>
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<ul id="rds_01_0020__ul17642104017155"><li id="rds_01_0020__li54901030151620">Cloud SSD<p id="rds_01_0020__p17134165501618"><a name="rds_01_0020__li54901030151620"></a><a name="li54901030151620"></a>Stores data in cloud disks for decoupled storage and compute. The maximum throughput is 350 MB/s.</p>
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</li><li id="rds_01_0020__li987316913174">Extreme SSD<p id="rds_01_0020__p12193381715"><a name="rds_01_0020__li987316913174"></a><a name="li987316913174"></a>Uses 25GE network and RDMA technologies to provide you with up to 1,000 MB/s throughput per disk and sub-millisecond latency.</p>
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</li></ul>
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</div>
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<div class="section" id="rds_01_0020__section16335234194"><h4 class="sectiontitle">Performance Comparison</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="rds_01_0020__table64124292310" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Performance comparison</caption><thead align="left"><tr id="rds_01_0020__row45124262311"><th align="left" class="cellrowborder" valign="top" width="29.073756432246995%" id="mcps1.3.3.2.2.4.1.1"><p id="rds_01_0020__p16534222313">Item</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="35.883361921097766%" id="mcps1.3.3.2.2.4.1.2"><p id="rds_01_0020__p6554232312">Cloud SSD</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="35.042881646655225%" id="mcps1.3.3.2.2.4.1.3"><p id="rds_01_0020__p155184282318">Extreme SSD</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="rds_01_0020__row7516421236"><td class="cellrowborder" valign="top" width="29.073756432246995%" headers="mcps1.3.3.2.2.4.1.1 "><p id="rds_01_0020__p3594282312">I/O performance</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.883361921097766%" headers="mcps1.3.3.2.2.4.1.2 "><p id="rds_01_0020__p15515425233">Subpar I/O performance due to additional network I/O overheads</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.042881646655225%" headers="mcps1.3.3.2.2.4.1.3 "><p id="rds_01_0020__p145114214236">Higher I/O performance than cloud SSDs</p>
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</td>
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</tr>
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<tr id="rds_01_0020__row65134282312"><td class="cellrowborder" valign="top" width="29.073756432246995%" headers="mcps1.3.3.2.2.4.1.1 "><p id="rds_01_0020__p95124262312">Elastic scalability</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.883361921097766%" headers="mcps1.3.3.2.2.4.1.2 "><p id="rds_01_0020__p7584252318">Scaling in seconds</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.042881646655225%" headers="mcps1.3.3.2.2.4.1.3 "><p id="rds_01_0020__p1651042122311">Scaling in seconds</p>
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</td>
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</tr>
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<tr id="rds_01_0020__row5510426239"><td class="cellrowborder" valign="top" width="29.073756432246995%" headers="mcps1.3.3.2.2.4.1.1 "><p id="rds_01_0020__p5554220231">Maximum IOPS</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.883361921097766%" headers="mcps1.3.3.2.2.4.1.2 "><p id="rds_01_0020__p6564252318">50,000</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.042881646655225%" headers="mcps1.3.3.2.2.4.1.3 "><p id="rds_01_0020__p55164242319">128,000</p>
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</td>
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</tr>
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<tr id="rds_01_0020__row4514217238"><td class="cellrowborder" valign="top" width="29.073756432246995%" headers="mcps1.3.3.2.2.4.1.1 "><p id="rds_01_0020__p1755427233">Maximum throughput</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.883361921097766%" headers="mcps1.3.3.2.2.4.1.2 "><p id="rds_01_0020__p651642132319">350 MiB/s</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.042881646655225%" headers="mcps1.3.3.2.2.4.1.3 "><p id="rds_01_0020__p195342122316">For specifications with more than 32 vCPUs, the maximum throughput is 1,000 MiB/s.</p>
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<p id="rds_01_0020__p1784134354013">For specifications with 32 vCPUs or fewer, the maximum throughput may not reach 1,000 MiB/s due to the underlying architecture.</p>
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</td>
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</tr>
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<tr id="rds_01_0020__row677112541234"><td class="cellrowborder" valign="top" width="29.073756432246995%" headers="mcps1.3.3.2.2.4.1.1 "><p id="rds_01_0020__p18771554122314">Read/write latency</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.883361921097766%" headers="mcps1.3.3.2.2.4.1.2 "><p id="rds_01_0020__p16771185442317">Medium</p>
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</td>
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<td class="cellrowborder" valign="top" width="35.042881646655225%" headers="mcps1.3.3.2.2.4.1.3 "><p id="rds_01_0020__p137711254142313">Medium</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rds_01_0028.html">DB Instance Description</a></div>
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</div>
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</div>
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