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 capability of processing 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

    OLAP and OLTP applications with hyper-threading enabled

Specifications

Table 1 E6 ECS specifications

Flavor

vCPUs

Memory

(GiB)

Max./Assured Bandwidth

(Gbit/s)

Max. PPS

(10,000)

Max. NIC Queues

Max. NICs

Virtualization

Hardware

e6.26xlarge.28

104

2948

30/20

550

16

8

KVM

CPU: Intel® Xeon® Skylake 8280

e6.52xlarge.28

208

5896

40/40

1,000

32

8

KVM

Table 2 E3 ECS specifications

Flavor

vCPUs

Memory

(GiB)

Max./Assured Bandwidth

(Gbit/s)

Max. PPS

(10,000)

Max. NIC Queues

Max. NICs

Virtualization

Hardware

e3.7xlarge.12

28

348

25/12

280

8

8

KVM

CPU: Intel® Xeon® Skylake 6151

e3.14xlarge.12

56

696

25/25

500

16

8

KVM

e3.26xlarge.14

104

1466

30/20

550

16

8

KVM

CPU: Intel® Xeon® Skylake 8176

e3.52xlarge.14

208

2932

40/40

1,000

32

8

KVM

Notes

  • Large-memory ECSs do not support NIC hot swapping.

  • Specifications of large-memory ECSs can be modified only within the same flavor family.

  • Affected by the memory loading speed, large-memory ECSs may take longer to start.

  • Table 3 lists the OSs supported by large-memory ECSs.

    Table 3 Supported OS versions

    OS

    Version

    CentOS

    • CentOS 7.9 64bit

    • CentOS 7.7 64bit

    EulerOS

    EulerOS 2.5 64bit

    Fedora

    • Fedora 35 64bit

    • Fedora 34 64bit

    • Fedora 33 64bit

    OpenSUSE

    OpenSUSE 15.3 64bit

    Oracle Linux

    • Oracle Linux Server release 8.4 64bit

    • Oracle Linux Server release 7.6 64bit

    Red Hat

    Red Hat Enterprise Linux 7.9 64bit

    SUSE

    • Novell SUSE Linux Enterprise Server 15 SP3 64bit

    • Novell SUSE Linux Enterprise Server 15 SP2 64bit

    • Novell SUSE Linux Enterprise Server 15 SP1 64bit

    • Novell SUSE Linux Enterprise Server 15 64bit

    • Novell SUSE Linux Enterprise Server 12 SP5 64bit

    • Novell SUSE Linux Enterprise Server 12 SP4 64bit

    • Novell SUSE Linux Enterprise Server 12 SP3 64bit

    SUSE-SAP

    • Novell SUSE Linux Enterprise Server 15 SP3 64bit

    • Novell SUSE Linux Enterprise Server 15 SP2 64bit

    • Novell SUSE Linux Enterprise Server 15 SP1 64bit

    • Novell SUSE Linux Enterprise Server 15 64bit

    • Novell SUSE Linux Enterprise Server 12 SP5 64bit

    • Novell SUSE Linux Enterprise Server 12 SP4 64bit

    • Novell SUSE Linux Enterprise Server 12 SP3 64bit

    Ubuntu

    • Ubuntu 20.04 server 64bit

    • Ubuntu 18.04 server 64bit

    Windows

    • Windows Server 2019 Standard 64bit

    • Windows Server 2016 Standard 64bit

    • Windows Server 2012 R2 Standard 64bit

  • Large-memory ECSs can use ultra-high I/O EVS disks as the system disk and data disks.

  • The primary and extension NICs of a large-memory ECS can be used only in certain scenarios. For details, see Table 4.

    Table 4 Application scenarios of the NICs of a large-memory ECS

    NIC Type

    Application Scenario

    Remarks

    Primary NIC

    Vertical layer 3 communication

    N/A

    Extension NIC

    Horizontal layer 2 communication

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

  • An ECS can have a maximum of 60 attached disks, including the system disk. For details about constraints, see Can I Attach Multiple Disks to an ECS?

    For example, an E3 ECS can have one system disk and 59 EVS disks.

    Note

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