Storage Type

A block storage can be used for two purposes: as a system storage that stores the OS and as an additional storage that stores data. When you create a new block storage, select a type for the block storage from the following.

Table 1. List of Storage Types
Class Storage Type
Standard Type M1
High Performance Type H2
Note: A storage type can be selected when it is created. You cannot change the storage type after it is created.

Standard Type

The standard type is efficient in cost performance. You can specify this for both the system storage and additional storage.

Table 2. List of Storage Types (Standard Type)
Storage Type Purpose Disk Size

Use this in the following cases:

  • When you deploy application data that requires frequent file access (reading and writing)
  • When you handle a lot of large data files
1 GB or more (specified in GB)

High Performance Type

For high performance type, the performance of the storage improves, as the disk size increases. You can use this as additional storage to store application data.

Table 3. List of Storage Types (High Performance Type)
Storage Type Purpose Maximum IOPS/GB Disk Size
H2 For small-scale or medium-scale DBs, when storing application data that requires data throughput. 5 IOPS/GB *1 1000 GB to 3000 GB (specified in GB)

*1: IOPS is calculated with a block size of 16 KB. Performance varies depending on the operating environment and other factors. There is no guarantee for a certain level of performance.

  • Do not use a high performance type storage as a system storage. If you use it as a system storage, the creation of virtual servers may become delayed or may fail.
  • The storage performance is indicated at its maximum. In addition, the storage performance varies in proportion to the disk size. Therefore, a disk with a small storage size may not produce enough storage performance.

  • The amount of usable storage space within a project is limited. For details, refer to Limiting Values.