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Elastic Compute Service:SCC instance families

Last Updated:Dec 13, 2024

This topic describes the features of Super Computing Cluster (SCC) instance families of Elastic Compute Service (ECS) and lists the instance types of each instance family.

Introduction

SCC is based on ECS Bare Metal Instance and uses high-speed Remote Direct Memory Access (RDMA) based interconnections to significantly improve the network performance and acceleration ratio of large-scale clusters. SCC has all the benefits of ECS Bare Metal Instance and provides high-bandwidth, low-latency networks.

SCC is used in scenarios such as high-performance computing (HPC), AI, machine learning, scientific and engineering computing, data analytics, and audio and video processing. In a cluster, nodes are connected through high-throughput, low-latency RDMA networks to serve high-concurrency workloads of applications, such as HPC and AI applications. RDMA over Converged Ethernet (RoCE) networks rival InfiniBand networks in terms of connection speed and can support more Ethernet-based applications.

SCC can work with other Alibaba Cloud computing services, such as ECS and Elastic GPU Service, to provide ultra-high-performance parallel computing resources for Elastic High Performance Computing (E-HPC), making cloud-based super computing possible.

HPC optimized instance families contain the following:

Comparison of SCCs, physical machines, and virtual machines

The following table compares the features of SCCs, physical machines, and virtual machines. In the table, Y indicates that the feature is supported, N indicates that the feature is not supported, and N/A indicates that the feature is not applicable.

Feature type

Feature

SCC

Physical machine

Virtual machine

Automated O&M

Minute-level delivery

Y

N

Y

Compute

Zero performance loss

Y

Y

N

Zero feature loss

Y

Y

N

Zero resource contention

Y

Y

N

Storage

Compatibility with ECS disks

Y

N

Y

Boot from system disks

Y

N

Y

Quick reset of system disks

Y

N

Y

Use of ECS images

Y

N

Y

Cold migration between physical and virtual machines

Y

N

Y

No need to install operating systems

Y

N

Y

No need for local RAIDs and better data protection for disks

Y

N

Y

Network

Compatibility with virtual private clouds (VPCs)

Y

N

Y

Compatibility with the classic network

Y

N

Y

No communication bottlenecks between physical and virtual machine clusters in VPCs

Y

N

Y

Management

Compatibility with existing ECS management systems

Y

N

Y

Consistent user experience on features such as Virtual Network Computing (VNC) with that on virtual machines

Y

N

Y

Out-of-band (OOB) network security

Y

N

N/A

scchfc6, compute-optimized SCC instance family with high clock speeds

To use it, submit a ticket.

  • Introduction: This instance family provides all features of ECS Bare Metal Instance. For more information, see Overview of ECS Bare Metal Instance families.

  • Supported scenarios:

    • Large-scale machine learning training

    • Large-scale high-performance scientific computing and simulations

    • Large-scale data analytics, batch processing, and video encoding

  • Compute:

    • Offers a CPU-to-memory ratio of 1:2.4.

    • Uses 3.1 GHz Intel® Xeon® Platinum 8269 (Cascade Lake) processors that deliver an all-core turbo frequency of 3.5 GHz.

  • Storage:

    • Is an instance family in which all instances are I/O optimized.

    • Supports enhanced SSDs (ESSDs), ESSD AutoPL disks, standard SSDs, and ultra disks.

  • Network:

    • Supports IPv4 and IPv6. For information about IPv6 communication, see IPv6 communication.

    • Supports both RoCE networks and VPCs. RoCE networks are dedicated to RDMA communication.

Instance types

Instance type

vCPU

Physical cores

Memory (GiB)

Network baseline bandwidth (Gbit/s)

Packet forwarding rate (pps)

RoCE network bandwidth (Gbit/s)

ENIs

ecs.scchfc6.20xlarge

80

40

192.0

30

6,000,000

50

32

Note

ecs.scchfc6.20xlarge provides 80 logical processors on 40 physical cores.

scchfg6, general-purpose SCC instance family with high clock speeds

To use it, submit a ticket.

  • Introduction: This instance family provides all features of ECS Bare Metal Instance. For more information, see Overview of ECS Bare Metal Instance families.

  • Supported scenarios:

    • Large-scale machine learning training

    • Large-scale high-performance scientific computing and simulations

    • Large-scale data analytics, batch processing, and video encoding

  • Compute:

    • Offers a CPU-to-memory ratio of 1:4.8.

    • Uses 3.1 GHz Intel® Xeon® Platinum 8269 (Cascade Lake) processors that deliver an all-core turbo frequency of 3.5 GHz.

  • Storage:

    • Is an instance family in which all instances are I/O optimized.

    • Supports ESSDs, ESSD AutoPL disks, standard SSDs, and ultra disks.

  • Network:

    • Supports IPv4 and IPv6. For information about IPv6 communication, see IPv6 communication.

    • Supports both RoCE networks and VPCs. RoCE networks are dedicated to RDMA communication.

Instance types

Instance type

vCPU

Physical cores

Memory (GiB)

Network baseline bandwidth (Gbit/s)

Packet forwarding rate (pps)

RoCE network bandwidth (Gbit/s)

ENIs

ecs.scchfg6.20xlarge

80

40

384.0

30

6,000,000

50

32

Note

ecs.scchfg6.20xlarge provides 80 logical processors on 40 physical cores.

scchfr6, memory-optimized SCC instance family with high clock speeds

To use it, submit a ticket.

  • Introduction: This instance family provides all features of ECS Bare Metal Instance. For more information, see Overview of ECS Bare Metal Instance families.

  • Supported scenarios:

    • Large-scale machine learning training

    • Large-scale high-performance scientific computing and simulations

    • Large-scale data analytics, batch processing, and video encoding

  • Compute:

    • Offers a CPU-to-memory ratio of 1:9.6.

    • Uses 3.1 GHz Intel® Xeon® Platinum 8269 (Cascade Lake) processors that deliver an all-core turbo frequency of 3.5 GHz.

  • Storage:

    • Is an instance family in which all instances are I/O optimized.

    • Supports ESSDs, ESSD AutoPL disks, standard SSDs, and ultra disks.

  • Network:

    • Supports IPv4 and IPv6. For information about IPv6 communication, see IPv6 communication.

    • Supports both RoCE networks and VPCs. RoCE networks are dedicated to RDMA communication.

Instance types

Instance type

vCPU

Physical cores

Memory (GiB)

Network baseline bandwidth (Gbit/s)

Packet forwarding rate (pps)

RoCE network bandwidth (Gbit/s)

ENIs

ecs.scchfr6.20xlarge

80

40

768.0

30

6,000,000

50

32

Note

ecs.scchfr6.20xlarge provides 80 logical processors on 40 physical cores.

scch5, SCC instance family with high clock speeds

  • Introduction: This instance family provides all features of ECS Bare Metal Instance. For more information, see Overview of ECS Bare Metal Instance families.

  • Supported scenarios:

    • Large-scale machine learning training

    • Large-scale high-performance scientific computing and simulations

    • Large-scale data analytics, batch processing, and video encoding

  • Compute:

    • Offers a CPU-to-memory ratio of 1:3.

    • Uses 3.1 GHz Intel® Xeon® Gold 6149 (Skylake) processors.

  • Storage:

    • Is an instance family in which all instances are I/O optimized.

    • Supports only standard SSDs and ultra disks.

  • Network:

    • Supports only IPv4.

    • Supports both RoCE networks and VPCs. RoCE networks are dedicated to RDMA communication.

Instance types

Instance type

vCPU

Physical cores

Memory (GiB)

Network baseline bandwidth (Gbit/s)

Packet forwarding rate (pps)

RoCE network bandwidth (Gbit/s)

ENIs

ecs.scch5.16xlarge

64

32

192.0

10

4,500,000

50

32

Note

ecs.scch5.16xlarge provides 64 logical processors on 32 physical cores.

Billing methods

SCCs support the pay-as-you-go and subscription billing methods. For more information, see Overview of billing methods.