Very slow perfeormance NFS file transfer

[fattybobo]

Hi guys,

Just setup my new Unraid server as my backup server.

My main NAS is a synology 920+

Synology 920+ has 4x12tb WD in SHR(similar Raid5)

Unraid has 2x12tb Parity Drive,

2x12tb Data disk and 2x8tb data disk.

Since unraid is backup server, those folders are not Cache enabled.

Mount Synology folders in unraid as NFS v3 share.

Copying files using docker Krusader.

Intel Gb nic MTU 9000. (tried 1500, slow)

Tunable (enable Direct IO) yes. 

 

I am only getting around 50MiB/s.

First it will boost to 100MiB for 1min, then slow down to 50MiB.

 

unraid spec as

ASRockRack D1541D4U-2O8R

64gb ddr4

LSI SAS 8port on board.

All drives are WD shucked drives. (drive is not the issue.)

 

This is very normal correct?

 

Becuase once I installed CA auto turbo write mode, speeds are now from 45-100 up and down now.

but most of the time is still 50-60 up and down to the 40s.

 

Docker and VM are in cache drive, 1 tb pcie 4.0 drive.