Hi guys,

 

I have 2 ZFS pool.

ZFS Pool (A) : 4x NVMe samsung 990 pro 2TB drives (ZFS RAID0)

ZFS Pool (B) : 15x SATA SSD samsung 870 evo 4TB drives (1x vdev / RAIDZ1) connected via HBA 9500 16i card.

The rest of the configuration is pretty powerful so no limitation with the CPU and co.

 

I tried everything. But regarding the configuration it's very slow.

When i open a shell in unraid and try to cp / pv files between Pool (A) to Pool (B) (So no network, no SMB and co) I get something like... 600 MB/s. When i try to use dd with bs 4M i get 725 MB/s.

 

When i try to copy via SMB on a 10gbe connection on Pool (A) or (B) i get 1GB/s speed... Sounds crazy. (Thanks JorgeB to help me in another thread to play with Disk Shares and co, fixed the smb thing).

 

Thanks for helping

Are you sing disks paths for the copy?

Interesting, what could be the difference ?

 

I go to the pool folder in /mnt/…. I directly pv file > /mnt/destinationpool/file

 

thanks

That should be the faster option,  would try creating two pools with just one device each and re-test.

Thanks for your answer. When I create a pool with only one NVMe i get the full speed... 

Possibly some of the devices are not performing ideally, you can try with just a couple, if slow try a different couple.