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

    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 only be used in the scenarios listed in 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.

last updated: 2024-07-27 00:22