Critical speed problem with NFS

[mosczq]

Hello guys,

I have no more strength. Can you help me? What is wrong with my backup system?
Im using NFS protocol.

Now im using NFS 3, because NFS 4 is not work for me...






When i changed protocol to NFS 4

I have output from dmesg:

[4986502.658417] RPC: fragment too large: 1195725856
[5079775.443536] RPC: fragment too large: 1212498244
[5079776.838822] RPC: fragment too large: 1195725856
[5079777.904353] RPC: fragment too large: 1195725856
[5079779.019151] RPC: fragment too large: 1195725856
[5079780.094697] RPC: fragment too large: 1195725856
[5079781.191190] RPC: fragment too large: 1195725856
[5079782.342539] RPC: fragment too large: 1195725856
[5506150.192256] RPC: fragment too large: 1195725856

My df-h

Maybe is is problem about tmp files?



My fstab;

 

[mosczq]

 

[Dunuin]

Your NFS Share is mounted as "sync" so everything is forced to use sync writes and caching can't be used. Its not unusual that sync writes are that slow. You should try "async" instead and check how much faster that is.