NFS server can write fast ONLY if server have battery-protected cache and
works in write-back mode. IT explains, why all NFS
NAS-es works few times faster vs. server based NFS (SUN have NFS accelerator
card, which did the same, as I remember).

In this case, NFS is 10 - 20% (only) slower vs iSCSI (for example).

----- Original Message -----
From: "Kevin Closson" <kevinc@(protected)>
To: <suse-oracle@(protected)>
Sent: Thursday, September 21, 2006 12:21 PM
Subject: RE: [suse-oracle] Re: [SPAM] Re: [suse-oracle] disk read and
processes


>>>
>>>35 MB/s on NFS is EXCELLENT speed.

That is relative (horrible actually). The HP EFS Clustered Gateway
(embedded
SuSE, embedded PolyServe) can easily do 200MB/s of writes
to the same filesystems or files and scale to 16 NAS heads.

It is Oracle OSCP Certified too.

Even in this low-end proof of concept we got 111MB/s writes
(e.g., tablespace creation) per NAS head limited only be the fact
we artificially limited each NAS head to 1GbE data path. In fact,
with NIC teamin, each NAS head is capable of nearly 240MB/s writes
and scalable.

http://h71028.www7.hp.com/enterprise/downloads/15650%20NAS%20Oracle%20WP
%204A2.pdf


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