Messages in this thread | | | From | Neil Brown <> | Date | Tue, 11 Jan 2005 20:54:20 +1100 | Subject | Re: Linux NFS vs NetApp |
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On Monday January 10, phyprabab@yahoo.com wrote: > Hello! > > I am trying to understand how NetApp can be so much > better at NFS servicing than my quad Opteron 250 SAN > attached machine. So I need some help and some > pointers to understand how I can make my opteron > machine come on par (or within 70% NFS performance > range) as that of my NetApp R200. I have run through > the NFS-how-to's and have heard "that is why they cost > so much more", but I really have to consider that > probably most of the ideas that are in the NetApp are > common knowldge (just not in my head). > > Can anyone shed some light on this?
If you want to come anything close to comparable with a Netapp, get a few hundred Megabytes of NVRAM (e.g. www.umem.com), and configure it as an external journal for your filesystem (I know this can be done for ext3, I don't know about other filesystems). Then make sure your filesystem journals all data, not just metadata (data=journal option to ext3).
If you use a dedicated drive (or mirrored pair) in place of the NVRAM, you will come reasonably close.
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