<p class="shortdesc"></p> <section class="section" id="type__section_uvr_5qc_rlb"><h2 class="doc-tairway">Classification by EBS Disk Performance </h2> <p class="p">According to the performance, EBS disks can be classified into the following categories: </p> <ul class="ul" id="type__ul_kph_tqc_rlb"> <li class="li"><strong class="ph b">Capacity EBS Disk (not advocated):</strong> Commonly used in scenarios with massive storage and low I/O requirements, such as data backup. </li> <li class="li"><strong class="ph b">Common EBS Disk:</strong> Commonly used in scenarios with low I/O requirements, such as data warehouse and log processing. The cost is low. </li> <li class="li"><strong class="ph b">Efficient EBS Disk:</strong> Commonly used in scenarios with medium I/O requirements, such as small database. </li> <li class="li"><strong class="ph b">Ultra-efficient EBS Disk:</strong> Commonly used in scenarios with high I/O requirements, such as medium-large size RDS, Oracle, and SQL Server. </li> <li class="li"><strong class="ph b">SSD EBS Disk:</strong> Commonly used for I/O intensive applications with high demand for performance and latency, such as medium-sized relational database, NoSQL database, distributed applications, and big data analysis. </li> <li class="li"><strong class="ph b">SSD Local EBS Disk: </strong>With ultra-high performance, it is an EBS disk created based on the local SSD disk device on the host of ECS. It can be applied to business scenarios with high demand for I/O performance and provides instances with access to local storage. </li> </ul> </section> <section class="section" id="type__section_hrz_vqc_rlb"><h2 class="doc-tairway">Classification by EBS Disk Purpose </h2> <p class="p">According to the purposes, EBS disks can be classified into system disks and data disks: </p> <ul class="ul" id="type__ul_f12_xqc_rlb"> <li class="li"><strong class="ph b">System Disk</strong><p class="p">System disks can be created only with the creation of ECS instances and not created separately. When you create an ECS instance, a system disk of 20 G to 120 G will be created by default. System disks are released along with the instances. The system disk types used by different types of ECS are shown in the following table. </p><table class="table" id="type__table_g12_xqc_rlb"><caption></caption><colgroup><col><col><col><col></colgroup><thead class="thead"> <tr class="row"> <th class="entry" id="type__table_g12_xqc_rlb__entry__1"><p class="p">Instance Type</p></th> <th class="entry" id="type__table_g12_xqc_rlb__entry__2"><p class="p">Specification Family Name</p></th> <th class="entry" id="type__table_g12_xqc_rlb__entry__3"><p class="p">System Disk Type</p></th> <th class="entry" id="type__table_g12_xqc_rlb__entry__4"><p class="p">CPU Type</p></th> </tr> </thead><tbody class="tbody"> <tr class="row"> <td class="entry" headers="type__table_g12_xqc_rlb__entry__1 "><p class="p">SSD ECS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__2 "><p class="p">SSD s4</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__3 "><p class="p">SSD EBS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__4 "><p class="p">Intel Xeon Broadwell (v4) </p></td> </tr> <tr class="row"> <td class="entry" headers="type__table_g12_xqc_rlb__entry__1 "><p class="p">Capacity ECS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__2 "><p class="p">General g4</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__3 "><p class="p">Capacity EBS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__4 "><p class="p">Intel Xeon Broadwell (v4)</p></td> </tr> <tr class="row"> <td class="entry" headers="type__table_g12_xqc_rlb__entry__1 "><p class="p">GPU ECS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__2 "><p class="p">GPU p1</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__3 "><p class="p">SSD EBS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__4 "><p class="p">Intel Xeon Broadwell (v4)</p></td> </tr> <tr class="row"> <td class="entry" headers="type__table_g12_xqc_rlb__entry__1 "><p class="p">GPU ECS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__2 "><p class="p">GPU v1</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__3 "><p class="p">SSD EBS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__4 "><p class="p">Intel Xeon® Skylake</p></td> </tr> <tr class="row"> <td class="entry" headers="type__table_g12_xqc_rlb__entry__1 "><p class="p">Computing ECS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__2 "><p class="p">Computing c4</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__3 "><p class="p">Common EBS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__4 "><p class="p">Intel Xeon Broadwell (v4)</p></td> </tr> <tr class="row"> <td class="entry" headers="type__table_g12_xqc_rlb__entry__1 "><p class="p">General ECS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__2 "><p class="p">General g5</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__3 "><p class="p">Common EBS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__4 "><p class="p">Intel Xeon® Skylake</p></td> </tr> <tr class="row"> <td class="entry" headers="type__table_g12_xqc_rlb__entry__1 "><p class="p">Computing ECS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__2 "><p class="p">Computing c5</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__3 "><p class="p">Common EBS</p></td> <td class="entry" headers="type__table_g12_xqc_rlb__entry__4 "><p class="p">Intel Xeon® Skylake</p></td> </tr> </tbody></table></li> <li class="li"><strong class="ph b">Data Disk</strong><p class="p">Data disks can be created with the creation of ECS instances or created separately. A maximum of five data disks can be mounted to an ECS instance. When a data disk is created with an instance, its life cycle is the same as that of the instance and is released along with the instance. Data disks created separately can be released separately and also set to be released along with the ECS instances. Data disks can be created freely according to the disk types supported in each region. </p></li> </ul> </section>