Shulou(Shulou.com)06/02 Report--

EBS (Elastic Block Store) is a subsidiary service of EC2 (Elastic Compute Cloud). EBS must attach to EC2 in order to play a role. Because the EC2 service is too large, I will compare some of the sub-services with OTC separately.

The corresponding service on OTC is called EVS (ElasticVolume Service).

Function

The functions of the two services are the same.

Provides block-level storage volumes for use with EC2 instances. EBS volumes are highly available and reliable storage volumes that can be mounted to any running instance in the same availability zone. EBS volumes mounted to an EC2 instance are exposed as storage volumes independent of the life cycle of the instance. With Amazon EBS, you can pay according to the actual usage.

Types

Provided by AWS

Solid state hard drive (SSD)

Hard disk (HDD)

Volume Typ

Universal SSD (gp2) *

Pre-configured IOPS SSD (io1)

Optimized HDD (st1)

Cold HDD (sc1)

Description

General-purpose SSD volumes that balance price and performance with multiple transactional workloads

The highest performance SSD volume designed for mission-critical applications

Low-cost HDD volumes designed for frequently accessed throughput-intensive workloads

Lowest cost HDD volume designed for infrequently accessed workloads

Use case

Recommended for most workloads

System boot volume

Virtual desktop

Low latency interactive application

Development and test environment

Business-critical applications that require sustained IOPS performance or higher than 10000 IOPS or 160 MiB/s throughput per volume

Large database workloads, such as:

MongoDB

Cassandra

Microsoft SQL Server

MySQL

PostgreSQL

Oracle

Low-cost streaming of workloads that require consistent, fast throughput

Big data

Data warehouse

Log processing

Cannot be a boot volume

Suitable for large amounts of infrequently accessed data and throughput-oriented storage

Situations where the lowest storage cost is critical

Cannot be a boot volume

API name

Gp2

Io1

St1

Sc1

Volume size

1 GiB-16 TiB

4 GiB-16 TiB

500 GiB-16 TiB

500 GiB-16 TiB

Maximum IOPS**/ Volum

10000

20000

five hundred

two hundred and fifty

Maximum Throughput / Volum

160 MiB/s

320 MiB/s

500 MiB/s

250 MiB/s

Maximum IOPS/ instance

65000

65000

65000

65000

Maximum Throughput / instance

1250 MiB/s

1250 MiB/s

1250 MiB/s

1250 MiB/s

Manage performance properties

IOPS

IOPS

MiB/s

MiB/s

Provided by OTC

I. Common upto O: SATA disk; IOPS: upto 1000; data throughput rate: upto 40 MB/s

Response time: 10-15 ms

ii. High I upto O: SAS disk; IOPS: upto 3000; data throughput rate: upto 120 MB/s

Response time: 6-10 ms

iii. Ultra-high I up to O: SSD disk; IOPS: up to 20000; data throughputrate: up to 320 MB/s

Response time: 1-3 ms

iv. Ultra-high large memory O (optimized latency): SSD disk; IOPS: up to 20000; optimized data throughputthrough InfiniBand: up to 400 MB/s; response time: 1 ms-for use with the "large memory" flavor.

There may be some differences in the specific performance, but the average user may not care about the detailed metrics.

You can probably make a counterpart.

AWS

OTC

Universal SSD (gp2) *

Ultra-high I/O

Pre-configured IOPS SSD (io1)

Ultra-high I Dot O (optimized latency)

Optimized HDD (st1)

High I/O

Cold HDD (sc1)

Common I/O

AWS also has a magnetic media volume that provides the lowest cost per GB. Magnetic media volumes are ideal for workloads where data is not often accessed and for applications that value low storage costs.

But the magnetic medium is the previous generation volume, which is rarely used.

Backup

Both parties can provide snapshot-based backups.

But OTC can provide BackupPolicy and can realize automatic backup.

Other

Another very special kind of block storage device provided by AWS is instance storage.

Instance storage provides temporary block-level storage for your instance. This storage is located on a disk that is physically connected to the host. Instance storage is an ideal temporary storage solution, ideal for storing information that needs to be updated frequently, such as caching, buffering, temporary data, and other temporary content, or data replicated from a set of instances, such as the load balancing pool of Web servers.

The instance storage consists of one or more instance storage volumes displayed as block storage devices. The size of the instance storage and the number of devices available vary depending on the instance type. Although instance storage is dedicated to specific instances, the disk subsystem is shared between instances on the host.

The virtual device of the instance storage volume is ephemeral [0-23]. The instance type that supports one instance storage volume has ephemeral0. The instance types that support two instance storage volumes are ephemeral0, ephemeral1, and so on.

The virtual device for the NVMe instance storage volume is / dev/nvme [0-7] N1. The instance type that supports one NVMe instance storage volume has / dev/nvme0n1. The instance types that support two NVMe instance storage volumes are / dev/nvme0n1 and / dev/nvme1n1, and so on.

The instance type determines the size of the available instance storage and the type of hardware used for the instance storage volume. The instance storage volume is included in the instance hourly cost. You must specify the instance storage volumes to use when starting the instance (except NVMe instance storage volumes, because they are available by default), and then format and mount the volumes before using them. You cannot make the instance storage volume available after starting the instance.

The following table lists the number, size, type, and performance optimization of instance storage volumes that can be used by each supported instance type. For a complete list of instance types, including EBS-only types, see Amazon EC2 instance types.

Instance Typ

Instance Storage Volum

Types

Need to initialize *

TRIM Support**

C1.medium

1 x 350 GB

HDD

C1.xlarge

4 x 420 GB (1680 GB)

HDD

C3.large

2 x 16 GB (32 GB)

SSD

C3.xlarge

2 x 40 GB (80 GB)

SSD

C3.2xlarge

2 x 80 GB (160 GB)

SSD

C3.4xlarge

2 x 160 GB (320 GB)

SSD

C3.8xlarge

2 x 320 GB (640 GB)

SSD

Cc2.8xlarge

4 x 840 GB (3360 GB)

HDD

Cg1.4xlarge

2 x 840 GB (1680 GB)

HDD

Cr1.8xlarge

2 x 120 GB (240 GB)

SSD

D2.xlarge

3 x 2000 GB (6 TB)

HDD

D2.2xlarge

6 x 2000 GB (12 TB)

HDD

D2.4xlarge

12 x 2000 GB (24 TB)

HDD

D2.8xlarge

24 x 2000 GB (48 TB)

HDD

G2.2xlarge

1 x 60 GB

SSD

G2.8xlarge

2 x 120 GB (240 GB)

SSD

Hi1.4xlarge

2 x 1024 GB (2048 GB)

SSD

Hs1.8xlarge

24 x 2000 GB (48 TB)

HDD

I2.xlarge

1 x 800 GB

SSD

I2.2xlarge

2 x 800 GB (1600 GB)

SSD

I2.4xlarge

4 x 800 GB (3200 GB)

SSD

I2.8xlarge

8 x 800 GB (6400 GB)

SSD

I3.large

1 x 475 GB

NVMe SSD

I3.xlarge

1 x 950 GB

NVMe SSD

I3.2xlarge

1 x 1900 GB

NVMe SSD

I3.4xlarge

2 x 1900 GB (3.8 TB)

NVMe SSD

I3.8xlarge

4 x 1900 GB (7.6 TB)

NVMe SSD

I3.16xlarge

8 x 1900 GB (15.2 TB)

NVMe SSD

M1.small

1 x 160 GB

HDD

M1.medium

1 x 410 GB

HDD

M1.large

2 x 420 GB (840 GB)

HDD

M1.xlarge

4 x 420 GB (1680 GB)

HDD

M2.xlarge

1 x 420 GB

HDD

M2.2xlarge

1 x 850 GB

HDD

M2.4xlarge

2 x 840 GB (1680 GB)

HDD

M3.medium

1 x 4 GB

SSD

M3.large

1 x 32 GB

SSD

M3.xlarge

2 x 40 GB (80 GB)

SSD

M3.2xlarge

2 x 80 GB (160 GB)

SSD

R3.large

1 x 32 GB

SSD

R3.xlarge

1 x 80 GB

SSD

R3.2xlarge

1 x 160 GB

SSD

R3.4xlarge

1 x 320 GB

SSD

R3.8xlarge

2 x 320 GB (640 GB)

SSD

X1.16xlarge

1 x 1920 GB

SSD

X1.32xlarge

2 x 1920 GB (3840 GB)

SSD

* if the volume mounted to a specific instance is not initialized, it will suffer the initial write penalty. "for more information, see optimizing disk performance for instance Storage volumes."

* * SSD-based instance storage volumes that support TRIM directives are not pre-formatted by any file system. However, you can format the volume using the file system of your choice after starting the instance. For more information, see instance Storage Volume TRIM support.

The c1.medium and m1.small instance types also include a 900MB instance storage swap volume that is not automatically enabled at startup. "for more information, see instance Storage Exchange volumes."

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