Main Concepts
File System
The file storage instance that users obtain through the console, API, etc., the file system is the entity for users to do data management, mount management and other operations.
File System Name
A string defined by the user, used to describe the usage scenario, business type, and other information that is easy to identify a specific file system instance.
Storage Type
The product type of the file system. At present, the storage types of file storage are divided into capacity type (SATA medium) and performance type (SSD medium) according to the storage medium used for their data.
Capacity
The space size specified when purchasing the file system, the capacity remains unchanged before the expansion operation is performed.
Remaining Capacity
The usable space size of the file system. As the number of files written into the file system and directories created increases, the remaining capacity decreases. When the remaining capacity is not sufficient for business needs, it should be expanded in a timely manner.
Mount Point
The entrance to access the file system, the mount operation can be completed by executing the mount operation on the IP provided by the mount point on the host that needs to access the file system. The mount point is located within the VPC, allowing the hosts within the VPC to access the specified file system by selecting the specified VPC when creating the mount point.
Mount Address
The IP address provided by the mount point for the mounting operation, the mount operation is performed in the host through this address.
Scaling
When the remaining capacity of the file system cannot meet the service availability requirements, the file system can be scaled. This operation has no effect on the applications using the file system, and no downtime or unmounting operations are required.
Mounting, Unmounting
The mount operation is an operation that mounts a UFS file system instance as a disk partition in the host by executing the mount command inside the host. Users can mount the file system to the specified directory mount point within the host.
The unmount operation is to separate a file system instance from the host. After unmounting, operations that occur in the previous directory mount point will not be reflected on the UFS file system.
Soft Quota
When the usage of the file system exceeds the purchased capacity, we allow the file system to have a certain proportion of additional capacity to cope with ongoing IO, so as not to cause business to fail to write due to untimely expansion operations. The proportion of this additional space is 4% of the purchased capacity, with a maximum limit of 1TB. We strongly recommend that file storage users enable usage alerts for each file system instance and expand in a timely manner.