Local storage of the physical machine where the instance is located: local SSD disk

The content of this article is about the local storage of the physical machine where the instance is located: the local SSD disk, which has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Previous generation disk - local SSD disk

Local SSD disk

Currently, the local SSD disk has stopped being sold. The following content is only for reference for users who are still using local SSD disks.

The local SSD disk comes from the local storage of the physical machine where the instance is located. This type of storage provides block-level data access capabilities for instances, with low latency, high random IOPS, and high throughput I/O capabilities.

When using a local SSD disk, pay attention to the following issues:

Since the storage space comes from the local SSD disk of the server, there is a risk of single point failure. It is recommended to implement data redundancy at the application layer to ensure data availability.

After ordering, the lifting configuration of CPU, memory, and local SSD disk is not supported.

Features

The local SSD disk uses the local SSD disk on the physical server where the instance is located as storage space. It has the following characteristics:

Low latency: Under normal circumstances, it provides microsecond-level access latency.

High random I/O: Provides up to 12,000 random IOPS performance.

High throughput: Provides I/O throughput performance of up to 300 MB/s.

Limited data reliability: Since the local SSD disk comes from a single physical server, data reliability depends on the reliability of the physical server, and there is a risk of single point failure. It is recommended to implement data redundancy at the application layer to ensure data availability.

Maximum 800 GB capacity: A single local SSD disk provides a maximum of 800 GB storage space.

Does not support mounting and unmounting: Since it comes from the local disk of the physical server, separate mounting and unmounting is not supported.

After ordering, the lifting configuration of CPU, memory, and local SSD disk is not supported.

Application Scenario

Local SSD disk has the characteristics of low latency, high random I/O, and high throughput, and is suitable for redundancy Capable of distributed I/O-intensive applications, but scenarios that do not require high data reliability, such as:

Distributed applications: NoSQL, MPP data warehouse, distributed file system and other I/O-intensive applications application. This type of application itself has distributed data redundancy capabilities, and local SSD disks can provide low latency, high random I/O, and high throughput I/O performance.

Large-scale online application logs: Large-scale online applications will generate a large amount of log data and require high-performance storage. At the same time, log data does not require high storage reliability.

Swap partition as an instance: Swap space can be used in Linux when the memory required by the application exceeds the actual allocated memory. When swap space is enabled, a Linux system can frequently swap in-use memory pages from physical memory to swap space (either a dedicated partition of an existing file system or a swap file), and can free up memory pages that require fast access speeds. space.

Local disk

This type of disk has been stopped for sale. There are still some old users using local disks.

Users who use local disks need to note: Since the storage space comes from the local disk of the server, there is a risk of single point of failure. It is recommended to implement data redundancy at the application layer to ensure data availability.

The above is the detailed content of Local storage of the physical machine where the instance is located: local SSD disk. For more information, please follow other related articles on the PHP Chinese website!