Cloud Parallel File Storage:Manage POSIX client mount targets

Notes on POSIX mount targets

• When you add a POSIX mount target, the CPFS file system automatically creates three pay-as-you-go Elastic Compute Service (ECS) instances in your Alibaba Cloud account. These instances are used to manage the CPFS client cluster. The ECS instance type is ecs.g*.large (g6 or a later generation). Make sure that you can purchase this instance type in the specified zone.

  You can call the DescribeAvailableResource operation to query the available resources in the zone. For more information, see DescribeAvailableResource.

• CPFS file systems support only mount targets in a virtual private cloud (VPC).

Add a POSIX client mount target

1. Log on to the NAS console.

2. In the left-side navigation pane, choose File System > File System List.

3. In the top navigation bar, select a region.

4. In the Mount Target column of the target file system, click Add.

5. In the Add Mount Target dialog box, you can configure the following parameters.

   Parameter	Description
   Mount Target Type	CPFS file systems only support VPC mount targets.
   VPC Network	The system automatically selects the VPC that you chose when you created the CPFS file system.
   vSwitch	Select a vSwitch that is created in the VPC. Note The CPFS file system consumes internal IP addresses from the vSwitch. It consumes one IP address for every 1.2 TiB of storage capacity, up to a maximum of 164 IP addresses. Select a vSwitch with many available IP addresses. For optimal performance, create the vSwitch in the same zone as the CPFS file system. Also, make sure the CPFS file system and the ECS instances are in the same zone.

6. After completing the configuration, click OK.

   Note

   Creating a POSIX mount target takes approximately 15 to 20 minutes. The status of the mount target then changes from Inactive to Active.

   • After a POSIX client mount target is created, the CPFS file system automatically creates three pay-as-you-go ECS instances in your Alibaba Cloud account to manage the POSIX client cluster. The ECS instance type is typically ecs.g*.large (g6 or later instance types). You can view these ECS instances in the Client Management node list on the file system details page.

     The naming convention for a client control plane node ECS instance is: <FSID>-<GENID>-qr-<QRID>. <FSID> is the ID of the CPFS file system. <GENID> is the serial number of the mount target, which increments each time a CPFS mount target is created. <QRID> is the number of the client control plane node. The default numbers for the three nodes are 001, 002, and 003.

     Warning

     While the CPFS file system is running, do not delete, stop, or modify the POSIX client control plane node ECS instances. Also, do not modify or delete the software or configurations on the client control plane nodes. Otherwise, I/O operations on the CPFS file system will be affected.

   • After a POSIX client mount target is created, the CPFS file system automatically creates a security group for the client control plane nodes in your Alibaba Cloud account. For more information, see View control plane node security groups.

     Warning

     While the CPFS file system is running, do not modify or delete this security group. Otherwise, I/O operations on the CPFS file system will be affected.

View a POSIX client mount target

On the File System List page, find the target file system and click Manage to open the File System Details page. Click the Mount and Use tab to view information about the POSIX client mount target and client control plane nodes.

Delete a POSIX client mount target