# Instance Family

#### Overview

An instance is a purchased BMS. Different instance types provide varied computing capabilities, storage space, and network performance. You can select a type that meets your service requirements.

#### BMS Types

The cloud platform provides a variety of BMS flavors that you can choose from.

- Compute-optimized

  This BMS type uses SDI iNICs and supports OLTP databases with higher performance, higher memory ratio, and transactional workloads cache.

  Table 1 Compute-optimized BMS specifications
  Flavor Name/ID | CPU | Memory | Local Disk | Extended Configuration
  --- | --- | --- | --- | ---
  physical.o2.medium | 2 x 8 Core Intel Xeon E5-2667 V4 (3.2 GHz) | DDR4 RAM (256 GB) | 2 x 800GB SAS SSD RAID1 + NVMe SSD Card 1.6 TB | 2 x 2-port 10GE

- High-performance computing

  This BMS type provides a large number of CPU cores, large memory size, and high throughput. These BMSs use Intel Skylake V5 CPUs and InfiniBand NICs and can be quickly provisioned.

  Table 2 High-performance computing BMS specifications
  Flavor Name/ID | CPU | Memory | Local Disk | Extended Configuration
  --- | --- | --- | --- | ---
  physical.h2.large | 2 x 18 Core Intel Skylake 6151 V5 (3.0 GHz) | DDR4 RAM (192 GB) | 1 x 1.6TB NVMe SSD | 1 x 100G IB + 2-port 10GE

- GPU-accelerated

  This BMS type provides outstanding floating-point computing performance and is ideal for real-time, highly concurrent massive computing scenarios, such as deep learning, scientific computing, CAE, 3D animation rendering, and CAD. G560 servers with InfiniBand NICs and industry-leading NVIDIA Tesla P100 GPU and Tesla V100 GPU are used to provide you with excellent performance and cost-effective services.

  Table 3 GPU-accelerated BMS specifications
  Flavor Name/ID | CPU | Memory | Local Disk | Extended Configuration
  --- | --- | --- | --- | ---
  physical.p1.large | 2 x 14 Core Intel Xeon E5-2690 V4 (2.6 GHz) | DDR4 RAM (512 GB) | 2 x 600GB SAS HDD + 6 x 800GB NVMe SSD | NIC: 1 x 100G IB + 2-port 10GE GPU: 8 x Tesla P100 GPU memory: 16 GB
  physical.p2.large | 2 x 14 Core Intel Xeon E5-2690 V4 (2.6 GHz) | DDR4 RAM (512 GB) | 2 x 600GB SAS HDD + 6 x 800GB NVMe SSD | NIC: 1 x 100G IB + 2-port 10GE GPU: 8 x Tesla V100 GPU memory: 16 GB

  physical.p1.large and physical.p2.large BMSs support only Ubuntu 16.04 and CentOS 7.4 private images.

- Memory-optimized

  This BMS type has DIMM memory with quick read/write speed and high density and is ideal for SAP HANA and memory databases.

  Table 4 Memory-optimized BMS specifications
  Flavor Name/ID | CPU | Memory | Local Disk | Extended Configuration
  --- | --- | --- | --- | ---
  physical.m2.medium | 4 x 24 Core Broadwell EX Xeon E7-8890 V4 (2.2 GHz) | DDR4 RAM (2048 GB) | 2 x 600GB SAS HDD RAID1 + 7 x 1.8TB SAS HDD RAID5 + 2 x 1.6TB NVMe SSD | 2 x 2-port 10GE
  physical.m2.xlarge | 4 x 24 Core Broadwell EX Xeon E7-8890 V4 (2.2 GHz) | DDR4 RAM (4096 GB) | 2 x 600GB SAS HDD RAID 1 + 14 x 1.8TB SAS HDD RAID 50 + 2 x 1.6TB NVMe SSD | 2 x 2-port 10GE

Parent topic: Instance