Date: Thu, 11 Jun 1998 17:00:44 -0700 (PDT) From: Robert Du Gaue <rdugaue@calweb.com> To: Doug Russell <drussell@saturn-tech.com> Cc: "Viren R. Shah" <viren@rstcorp.com>, stable@FreeBSD.ORG Subject: Re: NFS server performance (was: NFS performance benchmarks?) Message-ID: <Pine.BSF.3.95q.980611163652.7621A-100000@web2.calweb.com> In-Reply-To: <Pine.BSF.3.95.980611152533.6007A-100000@hobbes.saturn-tech.com>
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> Writing the 20 Megabyte file, 'iozone.tmp'...46.320312 seconds
> Reading the file...25.390625 seconds
>
> IOZONE performance measurements:
> 452749 bytes/second for writing the file
> 825955 bytes/second for reading the file
There's gotta be something screwy somewhere. Here's what I'm getting over
NFS to a PPro-200 System with a SCSI-to-SCSI RAID (16MB cache) from
Artecon:
Writing the 50 Megabyte file, 'iozone.tmp'...23.679688 seconds
Reading the file...18.742188 seconds
IOZONE performance measurements:
2214083 bytes/second for writing the file
2797368 bytes/second for reading the file
The NFS server is 100Base-T Full Duplex, the client I ran iozone on was
10-BaseT half duplex. Both are connected to an Intel 510T 10/100 switch.
Running the same test on a client that is also 100Base-T Full Duplex on
the same switch results in:
Writing the 50 Megabyte file, 'iozone.tmp'...18.515625 seconds
Reading the file...8.375000 seconds
IOZONE performance measurements:
2831597 bytes/second for writing the file
6260155 bytes/second for reading the file
I would look at your NIC cards, the HUB/Switch (if any), and cache in the
RAID controller as possible bottlenecks.
-----
For comparison...
The Artecon is a pretty fast RAID system from what I can see. Doing an
iozone local to the NFS on the RAID gets:
Writing the 256 Megabyte file, 'iozone.tmp'...25.164062 seconds
Reading the file...11.546875 seconds
IOZONE performance measurements:
10667413 bytes/second for writing the file
23247454 bytes/second for reading the file
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Robert Du Gaue - rdugaue@calweb.com http://www.calweb.com
President, CalWeb Internet Services Inc. (916) 641-9320
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