Ive got slow smb speed when writing to a cache enabled share.

 

smb has around 30mb/s

using scp maxes out wifi around 90 mb/s

i only transfer one large file at time

I'm on 6.10-rc.2

Added diagnostics

 

tron-diagnostics-20220109-2150.zip

Edited January 11, 20224 yr by ukkeman

Speed to windows vms is at full.

Write speed to cache array is at 500mb/s

Which share?

M----s

I can see it's writing on to the cache but the way it's writing is odd in the dashboard.

The speed is shown as zero then for a brief moment goes to 300mb/s and then drops to zero again.

If you've made changes to the use cache setting use Dec 8, then they won't take effect until a stop / start of the array (known issue on RC2)

No I did not the settings are there since a very long time and since I restarted the machine and the array several times.

So I don't think this is an issue.

I also can see that smb transfer writes to the cache disks when I look at the dashboard and directly on the mounted disks.

 

I also can not see any significant things like maxed out CPU or oom in tools like netdata.

This drives me a bit crazy.

 

There is no encryption of the disks but if that'd be the bottle neck I would also see a higher CPU load

I tried to create a new share with cache only. Restarted the array. Got the same speed around 30MB/s

Tested it with GBIT Lan now:
SMB: 45 MB/s

SCP: 110 MB/s

 

to the same share.

Used in both cases the mnt/User path and not any direct disk share path.