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  6. Large-Memory ECSs

Large-Memory ECSs

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

    E1 ECSs: OLAP applications, such as in-memory databases (SAP HANA BWoH, SAP HANA applications, including Business Suite S/4HANA, Business Suite on HANA, and Business Warehouse on HANA), big data processing engines (Apache Spark), and data mining

    E2 ECSs: OLTP applications, such as in-memory databases (SAP HANA SoH, SAP HANA applications, including Business Suite S/4HANA, Business Suite on HANA, and Business Warehouse on HANA), big data processing engines (Apache Spark), high-performance databases, and distributed memory cache

Specifications

Table 1 E1 ECS specifications

Flavor

vCPUs

Memory (GB)

Virtualization Type

Hardware

e1.xlarge

4

128

XEN

  • CPU: Intel® Xeon® Processor Haswell E7-8880
  • Business network: 10GE SR-IOV passthrough IP network
  • Storage network: 56 Gbit/s InfiniBand network
  • Disk type: high I/O (performance-optimized I) and ultra-high I/O (latency-optimized)

e1.2xlarge

8

256

XEN

e1.4xlarge

16

470

XEN

e1.8xlarge

32

940

XEN

Table 2 E2 ECS specifications

Flavor

vCPUs

Memory (GB)

Virtualization Type

Hardware

e2.2xlarge

8

128

XEN

  • CPU: Intel® Xeon® Processor Haswell E7-8880
  • Business network: 10GE SR-IOV passthrough IP network
  • Storage network: 56 Gbit/s InfiniBand network
  • Disk type: high I/O (performance-optimized I) and ultra-high I/O (latency-optimized)

e2.3xlarge

12

256

XEN

e2.4xlarge

18

445

XEN

e2.9xlarge

36

890

XEN

Notes

  • Large-memory ECSs do not support NIC hot swapping.
  • E1 and E2 ECSs support the following OSs:
    • Windows Server 2016 DataCenter 64bit
    • Windows Server 2012 Standard 64bit
    • Windows Server 2012 DataCenter 64bit
    • Windows Server 2012 R2 DataCenter 64bit
    • Windows Server 2012 R2 Standard 64bit
    • Windows Server 2012 R2 Essentials 64bit
    • CentOS 7.3 64bit
    • CentOS 7.2 64bit
    • CentOS 7.1 64bit
    • CentOS 7.0 64bit
    • CentOS 6.8 64bit
    • CentOS 6.7 64bit
    • CentOS 6.6 64bit
    • CentOS 6.5 64bit
    • CentOS 6.4 64bit
    • CentOS 6.3 64bit
    • Debian 8.0 64bit
    • Debian 8.4 64bit
    • Debian 8.5 64bit
    • Debian 8.6 64bit
    • OpenSUSE 42.2 64bit
    • Ubuntu Server 16.10 64bit
    • Ubuntu Server 16.04 64bit
    • SUSE Linux Enterprise Server 11 SP3 64bit
    • SUSE Linux Enterprise Server 11 SP4 64bit
    • SUSE Linux Enterprise Server 12 64bit
    • SUSE Linux Enterprise Server 12 SP1 64bit
    • SUSE Linux Enterprise Server 12 SP2 64bit
    • Red Hat Enterprise Linux 6.8 64bit
    • Red Hat Enterprise Linux 7.0 64bit
    • Red Hat Enterprise Linux 7.2 64bit
    • Red Hat Enterprise Linux 7.3 64bit
    • Fedora 25 64bit
    • Oracle Enterprise Linux 6.8 64bit
    • Oracle Enterprise Linux 7.3 64bit
    • EulerOS 2.2 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 3.
    Table 3 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.

  • Up to 60 disks (including the system disk) can be attached to an ECS. For details about restrictions, see section Can Multiple Disks Be Attached to an ECS?

    An example is provided as follows:

    If you create an e1.xlarge large-memory ECS, it can be attached with up to 60 disks, where

    • The number of system disks is 1.
    • The number of EVS disks is at most 59.
    NOTE:

    The maximum number of disks attached to an existing large-memory ECS remains unchanged. To attach 60 disks, enable advanced disk. For details, see section Enabling Advanced Disk.