stable/8-amd64 on ZFS as a vSphere backend

Dmitry Morozovsky marck at
Sat Jun 11 15:30:11 UTC 2011

Dear colleagues,

any particular hints to tune FreeBSD NFS server for efficient work as a VMware 
vSphere backend?

For now, I set up 16G amd64 with ZFSv28, 4k recordsize and no other particular 
tuning, roundrobin lagg on 2 ems, mtu 9000. There are 4 WD RE3 1T disks as 
AHCI, on raid10 ZFS config. Local 

However, performance seems to be far from optimal (more deep testing is due, 
but at least average latency is too far, more than 100 ms). 

Local tests from zvol's (yes, that's not directly comparable but still) provide 
more than 500 MB/s on single/dual thread.

Thanks in advance!

D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck at ]
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at ***

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