Solaris writing to Windows NFS Server - poor performance

ChrisD.

ChrisD.

ChrisD.

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I've got a Solaris 10 machine and I need to copy the Oracle DB backups to a Windows NFS share. The share is running on Windows Server 2008 R2. Read performance is limited by network speed as you'd expect, however I'm seeing a bottleneck of around 500 kb/s when writing.

Unfortunately installing any other apps on either box is out of the question as is using smb as the client built into Solaris 10 is terrible.

nfsstat -rc doesn't show any timouts or a high number of badcalls (<1%), the NFS log in Windows doesn't show much apart from lots and lots of 'write operation successful'.

nfsstat - shows nothing untoward.

Both are VMs and both are on the same network and ESXi 5.5 host.
 
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I've tried various mount options, none seem to have improved things so far. I've written a shell script to copy the files, so RMAN backs up the db and then I use a mv command to put them on the NFS share.
 
Yeah they are E1000, will try switching but I'm not sure that's the issue.

I created a smb share on the Solaris server and mounted it on Windows, saw 120+ MB/s transfer rate so I'm pretty convinced it's something to do with NFS performance.
 
Yes, same host. For testing I created a new 2008 R2 machine on the same host (to eliminate any physical networking issues). The host has local storage, where both VMs are stored.
 
Oh, just to add. I tried it to another server, a 2012R2 physical Hyper V host we have, same issue. So it's something on the Solaris end to do with NFS tuning I think.
 
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