[SOLVED] Cache read/write over 10bE help.

[3vang]

I recently upgrade my network and equipment to a 10GbE network. I know I can fully saturate the link because I can read from my cache at over 1100 MB/s, but I can only write at about 600 MB/s. I have two Samsung PM981 1TB NVme SSD (OEM 970 EVO equivalent) in RAID1 with btrfs. I don't see why the write speed can't be fully saturated over the network like the read speeds. I an no expert on btrfs, so can it be a limitation of that file system, or certain settings I am missing, or it is truly my hardware limitation? Unraid is running on a Supermicro X10SDV-TLN4F, Xeon D-1541, 64 GB DDR4 RAM at 2133.

[JorgeB]

Try writing to the disk share, user shares adds some overhead.

[JorgeB]

30 minutes ago, 3vang said:

Xeon D-1541

Also, this isn't great for SMB, as it's single threaded, it's like high clock CPUs.

[3vang]

36 minutes ago, JorgeB said:

Try writing to the disk share, user shares adds some overhead.

Is this the correct way to connect to disk share directly, \\host-ip\mnt\cache\share-name (in Windows) and host-ip:/mnt/cache/share-name (in Linux)? using cache/disk as opposed to mnt/user. 

[3vang]

45 minutes ago, JorgeB said:

Also, this isn't great for SMB, as it's single threaded, it's like high clock CPUs.

Yes, the low 2.1 Ghz maybe cause, but this cpu is most definitely multithreaded if OS and application can utilizes.

[JorgeB]

42 minutes ago, 3vang said:

but this cpu is most definitely multithreaded

Yes, but Samba only uses 1 thread.

 

52 minutes ago, 3vang said:

Is this the correct way to connect to disk share directly, \\host-ip\mnt\cache\share-name (in Windows)

Correct.

[3vang]

On 1/7/2021 at 12:06 PM, 3vang said:

Yes, the low 2.1 Ghz maybe cause, but this cpu is most definitely multithreaded if OS and application can utilizes.

You are correct and I just wanted to provide an update. Change board and CPU to a 3.7 Ghz, SMB read and write are 1100 MB/s now.