Symptoms
When clients open too many files without closing them on a Unity NAS server, it may cause access issue.Dell EMC Unity: Linux clients can't open files/folders in Unity NFS shares (Dell EMC Correctable) | Dell USIdentifying the active open file count for NFS and active connected NFS clients can help identify the problematic client so a customer can take proper action to close the opened files from client and investigate the incorrect behavior of the client.
Cause
Identifying the active open file count for NFS and active connected NFS clients can help identify the problematic client so a customer can take proper action.
Resolution
To get the active connected NFS client for NFSv3 and NFSv4, the svc_nfssupport -listClient command can be used on Unity arrays running OE 5.1 and greater.
01:27:16 root@VIRT2213Y2VF7N spa:/cores/service/user# svc_nfssupport NFS_test -listClient
NFS v3 Clients:
|--- 5.6.7.248
NFS v4 Clients:
|--- 5.6.7.242
|--- 5.6.7.249
For Unity arrays running an OE below 5.1, an alternative way to get the list of connected NFS clients is to run the "showmount -a " command on any of the NFS clients. The command can also be executed on the Unity SP but root privilege is required.
00:54:57 root@VIRT2213RTVFNA spa:/cores/service/user# showmount -a 5.6.7.22
All mount points on 5.6.7.22:
rhel8.peeps.lab:/NFS_export
solaris11.peeps.labL/NFS_export
rhel7.peeps.lab:/NFS_export
Please note the showmount output doesn't tell whether the clients are mounting the NFS share via NFSv3 or NFSv4. If you need to determine the number of NFSv4 versus NFSv3 clients shown in the showmount output please contact Dell Technologies or you authorized service provider for additional assistance and reference this article.There is no method to determine the NFSv3 open file count. The method used to determine the NFSv4 open file count requires root access. If you need determining the NFSv4 open file count please contact Dell Technologies or you authorized service provider for additional assistance and reference this article.
