slow replication speed 10G

[maygyver]

Yes the HDD is 3GB/s spec.
But a single HDD will never do it.

You have 16 disk with RAID6. I think 300 MB/s is not so bad. Should be a little bit more. May be up to 500MB/s.

Sven

[maygyver]

Is the read Cache enabled?
Is the write mode, Write back or Write through.

[Jerky_san]

Type of 10Gbe nics? RPM rating of hard drive? Make/Model of raid card? Raid 6 with 16 hard drives will cause a bottleneck on the raid card.. Raid cards have major problems getting over the 600mb hurdle with raid 6. If you want more performance consider raid 10 or raid 5. I run raid 10 for my 20 disk VM system but i also replicate to a second 20 disk san both open-e. This ensures i have dual fail over encase of disk loss.