NFS Share problem

[imasduser]

Hello. I have an NFS Share between Proxmox and Windows Server for backups purpose. The share was working fine all the time but a few days ago I started to have issues.

I can create/delete files from Windows and Proxmox via NFS Share and all changes works fine. Files are visible from both computers. For example If I create a .txt file in Windows I can read it from Proxmox via NFS share.

If I make a local backup all works fine but if I try to backup to NFS I have this problems:

INFO: rsync: writefd_unbuffered failed to write 4 bytes to socket [sender]: Broken pipe (32)
INFO: rsync: close failed on "/mnt/pve/nfsWinServer/dump/vzdump-openvz-106-2016_12_20-12_23_08.tmp/": Input/output error (5)
INFO: rsync: connection unexpectedly closed (18620 bytes received so far) [sender]
INFO: rsync error: error in rsync protocol data stream (code 12) at io.c(605) [sender=3.0.9]
ERROR: Backup of VM 106 failed - command 'rsync --stats -x --numeric-ids -aH --delete --no-whole-file --inplace '/mnt/backups/private/106/' '/mnt/pve/nfsWinServer/dump/vzdump-openvz-106-2016_12_20-12_23_08.tmp'' failed: exit code 12
INFO: Backup job finished with errors
TASK ERROR: job errors

I can view how the folder is created an appearing in Windows Server

 

[imasduser]

I checked that the problem occurs only on certain VM's and CT's. In some machines (VM's & CT's) NFS Backup is working fine. In others never works again. I don´t understand...

 

[dmora]

Might want to check you're not dropping packets somewhere or link is flapping. Also run the command manually on the node thats keeps failing and see if you can get a more verbose output.

 

[imasduser]

Thanks a lot for your reply.

The link and connectivity betweeen node and the remote NFS storage server really is good. I can transfer files at 50MB/s. I can make ping from node to the server and all is ok. Very good response time. I let the ping a half an hour and no packet loss.

I will check with the command manually.

 

[imasduser]

Well I noticed that the local storage for backups is very very slow than normally. For example normal speed for local backups in a CT is 102MB/s now i have 17 MB/s. Normally, the backups has done along the night. Today at the morning the backups doesn't finalized yet. What can I do please? Thank you a lot.

 

[imasduser]

Problem solved. Restarting entire node and host machine was solved the slow local backups issue. Changing NFS share by a typical CIFS share solved the slow network backups.

Thanks for all.