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Large-Memory ECSs

Updated at: Aug 19, 2019 GMT+08:00

Overview

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 switching, low latency, and process large volumes of data. Large-memory ECSs provide large memory and high computing, storage, and network performance.

  • Applications

    Large-memory ECSs are suitable for applications that require a large amount of memory, rapid data switching, and low latency, and process large volumes of data.

  • Application scenarios

    E3 ECSs: OLAP and OLTP applications with hyper-threading enabled

Specifications

Table 1 E3 ECS specifications

Flavor

vCPUs

Memory (GB)

Virtualization Type

e3.7xlarge.12

28

348

KVM

Notes

  • Large-memory ECSs do not support NIC hot swapping.
  • E3 ECSs support the following OS that has been verified:

    SUSE Enterprise Linux Server 12 SP2 64bit

  • E1 and E2 ECSs can use the following types of EVS disks as system disk and data disk:
    • High I/O (performance-optimized I)
    • Ultra-high I/O (latency-optimized)
  • The primary and extension NICs of a large-memory ECS have specified application scenarios. For details, see Table 2.
    Table 2 Application scenarios of the NICs of a large-memory ECS

    NIC Type

    Application Scenario

    Remarks

    Primary NIC

    Applies to vertical layer 3 communication.

    N/A

    Extension NIC

    Applies to horizontal layer 2 communication.

    To improve network performance, you can set the MTU of the extension NIC to 8888.

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