Re: rman/NFS over internet, performance

From: Jakub Wartak <>
Date: Sun, 26 Oct 2008 20:41:35 +0100
Message-Id: <>

Dnia wtorek, 21 października 2008 13:51, Bjoern Rost napisał:
> Hi,
> I am trying to backup through an NFS mount to a disk located in a
> different datacenter between some solaris boxes. This works, but I am
> not satisfied with speed/performance. Using ftp, i can transfer data at
> more than 30mbit/s, while NFS peaks at only 16Mbit/s
> I already use compressed backupsets. There doesn't seem to be a whole
> lot to tune in nfs client settings as oracle requires tcp, vers=3 and
> noac anyway.
> I tried to use more (and less) parallel channels but that didn't help
> much either.
> Any more ideas?

Have you tried rsize and wsize=32k on that mount point and TCP OS tunning (mainly window size) ? Whats your latency ?

Jakub Wartak
Received on Sun Oct 26 2008 - 14:41:35 CDT

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