CFS supports both NFS v3.0 and NFS v4.0 (later version). NFS v3.0 is compatible with Windows clients while NFS v4.0 provides file locking and other features.
In cases that involve a large number of small files or mixed use of large and small files, problems may occur when you mount a CFS file system onto a Tencent Kubernetes Engine（TKE） or Cloud Virtual Machine（CVM）client using NFS v4.0. After an application runs on the client for a period of time, you may find the client load remains high and keeps accumulating. Besides, the service data may be read slow or no response is returned, but the CPU utilization of the service process is not very high.
The above problems happen mainly due to the NFS v4.0 limitation as described below. If the client uses NFS v4.0 to read and write a lot of files at the same time, the large number of OPEN/CLOSE requests in parallel may result in a bottleneck on the client because the OPEN/CLOSE operations are serialized in NFS v4.0.
In cases where your service application involves a massive number of small files, or files to operate on in parallel, it is recommended that you mount file systems onto your client using NFS v3.0 to avoid high client load. The following describes how to do so.
Open the Cloud File Storage console, and click on the name of the file system to mount. Select the mount Target Info tab, and find the NFS v3.0 mount command as shown below. Then, use this command to mount the file system.
You can mount file systems onto a TKE client through PVs/PVCs using NFS v3.0. The example configuration is as shown below:
apiVersion: v1 kind: PersistentVolume metadata: name: cfs-test-pv spec: accessModes: - ReadWriteMany capacity: storage: 9000Gi mountOptions: - vers=3 - nolock - proto=tcp - noatime - nodiratime - noexec - hard - rsize=524288 - wsize=524288 nfs: path: /[cfs-id]/[mount-path]/ server: [cfs-server-ip] persistentVolumeReclaimPolicy: Retain storageClassName: cfs-test-pv volumeMode: Filesystem apiVersion: v1 kind: PersistentVolumeClaim metadata: name: cfs-test-pvc namespace: default spec: accessModes: - ReadWriteMany resources: requests: storage: 9000Gi storageClassName: cfs-test-pv volumeMode: Filesystem volumeName: cfs-test-pv
Contact our sales team or business advisors to help your business.
Open a ticket if you're looking for further assistance. Our Ticket is 7x24 avaliable.
Was this page helpful?