On Wed, Jun 03, 2015 at 11:37:58AM +0530, Raghavendra Talur wrote: > On Wednesday 03 June 2015 09:13 AM, Pranith Kumar Karampuri wrote: > > > > > >On 06/01/2015 11:07 AM, Bipin Kunal wrote: > >> Hi All, > >> > >> Is there a way to find total number of gluster mounts? > >> > >> If not, what would be the complexity for this RFE? > >> > >> As far as I understand finding the number of fuse mount should be > >> possible but seems unfeasible for nfs and samba mounts. > >True. Bricks have connections from each of the clients. Each of > >fuse/nfs/glustershd/quotad/glfsapi-based-clients(samba/glfsheal) would > >have separate client-context set on the bricks. So We can get this > >information. But like you said I am not sure how it can be done in nfs > >server/samba. Adding more people. > > Depends on why you would want to know about the clients: > > 1. For most of the use cases, admin might just need to know how many > Samba/NFS servers are currently using the given volume(Say just to perform umount everywhere). > In this case, each Samba/NFS server is just like a FUSE mount and we can use the same > technique that we would use for the above case that Pranith has mentioned. > > 2. If the requirement is to identify all the machines which are accessing a volume, > (probable use case:- you may want a end-user to close a file etc) > above method won't be sufficient. To get details of SMB clients, you would have to > run 'smbstatus' command on all SMB server nodes and it would output details of > connected SMB clients in this format. > PID Username Group Machine Protocol Version Service pid machine Connected at Gluster/NFS supports the 'showmount' command (over the MOUNT RPC protocol). It can be used to list all the NFS-clients that have a volume/subdir mounted. This list should not be 100% trusted though. NFSv3 uses the MOUNT RPC protocol to get the file-handle for the mountpoint. After that, the NFSv3 protocol can use the export until it wants to. When the NFS-client unmounts the export, it sends the UMNT procedure to the NFS-server what causes the NFS-client/export combination to be removed from the client-list (showmount output). A client that does not send a UMNT, will not be removed from the list of active clients. This can happen when a client does a umount during network issues, or a client spontaneously reboots (or kernel panic or ..). Very similar are clients that mount the exact same export/subdir in multiple mountpoints. The NFS-server can not differentiate between a client that did not set a UMNT, or a client that mounts the same export/subdir more than once. These clients will only be listed once. HTH, Niels _______________________________________________ Gluster-devel mailing list Gluster-devel@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-devel
