Slow upload to nfs server

[mafkees1233]

Hello again,

I have some nfs shares on a debian server. I can mount them just fine and downloading goes great but uploading seems to be a problem. It goes really slow.

I got this in my fstab
192.168.0.15:/mnt/server-backup /mnt/server-backup nfs rw,nodev,nosuid 0 0

Is there a way to speed it up?

I'm running current (snapshot)

rpcinfo debian server
program vers proto port
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100005 1 udp 33756 mountd
100005 1 tcp 49393 mountd
100005 2 udp 58653 mountd
100005 2 tcp 50081 mountd
100005 3 udp 59368 mountd
100005 3 tcp 35293 mountd
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100227 3 tcp 2049
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100227 3 udp 2049
100021 1 udp 37613 nlockmgr
100021 3 udp 37613 nlockmgr
100021 4 udp 37613 nlockmgr
100021 1 tcp 44301 nlockmgr
100021 3 tcp 44301 nlockmgr
100021 4 tcp 44301 nlockmgr

mount:
/dev/sd0a on / type ffs (local)
/dev/sd0k on /home type ffs (local, nodev, nosuid)
/dev/sd0d on /tmp type ffs (local, nodev, nosuid)
/dev/sd0f on /usr type ffs (local, nodev)
/dev/sd0g on /usr/X11R6 type ffs (local, nodev)
/dev/sd0h on /usr/local type ffs (local, nodev, wxallowed)
/dev/sd0j on /usr/obj type ffs (local, nodev, nosuid)
/dev/sd0i on /usr/src type ffs (local, nodev, nosuid)
/dev/sd0e on /var type ffs (local, nodev, nosuid)
/dev/sd1a on /mnt/backup type ffs (local, nodev, nosuid)
192.168.0.15:/mnt/videos on /mnt/videos type nfs (nodev, nosuid, v3, udp, timeo=100, retrans=101)
192.168.0.15:/mnt/server-backup on /mnt/server-backup type nfs (nodev, nosuid, v3, udp, timeo=100, retrans=101)
192.168.0.15:/mnt/downloads on /mnt/downloads type nfs (nodev, nosuid, v3, udp, timeo=100, retrans=101)

debian export
/mnt/server-backup 192.168.0.0/24(insecure,rw,sync,no_subtree_check,no_root_squas h)
/mnt/downloads 192.168.0.0/24(insecure,rw,sync,no_subtree_check,no_root_squas h)
/mnt/videos 192.168.0.0/24(rw,sync,no_subtree_check,no_root_squash)
/home/robert 192.168.0.0/24(insecure,rw,sync,no_subtree_check,no_root_squas h)

[jggimi]

There are some operands and options defined in mount_nfs(8) which can affect performance. You can also actively monitor performance with nfsstat(1).

All other tuning must occur on your server.

[jggimi]

I'm wrong, there is one more client knob, the sysctl vfs.nfs.iothreads, mentioned in mount_nfs().

[mafkees1233]

Problem solved. Server needed async instead of sync in exports.

Thanks a lot for your help Jggimi. I see your name a lot while googling for openbsd things.
You're doing a great job *thumbs up*