Date: Sun, 20 Aug 1995 15:16:12 +0800 (CST) From: Brian Tao <taob@gate.sinica.edu.tw> To: Terry Lambert <terry@cs.weber.edu> Cc: freebsd-hackers@freebsd.org Subject: Re: Making a FreeBSD NFS server Message-ID: <Pine.BSI.3.91.950820150733.17751w-100000@aries> In-Reply-To: <9508191751.AA19996@cs.weber.edu>
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On Sat, 19 Aug 1995, Terry Lambert wrote:
>
> You can turn on async writes in the BSD NFS server.
I tried that out with some dramatic results:
(with untweaked kernel)
MB reclen bytes/sec written bytes/sec read
1 512 116914 298925
1 1024 150806 234236
1 2048 159973 395922
1 4096 134756 591267
1 8192 124853 630130
2 512 137942 643730
2 1024 127462 514244
2 2048 134486 518215
2 4096 130371 544493
2 8192 130816 522247
[...]
(with tweaked kernel)
MB reclen bytes/sec written bytes/sec read
1 512 860370 621378
1 1024 798915 729444
1 2048 877240 762600
1 4096 762600 430185
1 8192 854889 710146
2 512 820903 731431
2 1024 801299 619943
2 2048 762600 600526
2 4096 789516 674460
2 8192 836247 719666
[...]
> Be warned that, though Sun and SVR4 do this too, this is a cache
> coherency violation and can result in Bad Things Happening [...]
I think it was Garrett who remarked that the whole idea of
stateless NFS was a gross violation of filesystem consistency. ;-)
> One alternative is to use NFSv3 on both the client and the server.
> This means going all BSD or including OSF/1,
Does this include BSD/OS 2.0 as well?
--
Brian ("Though this be madness, yet there is method in't") Tao
taob@gate.sinica.edu.tw <-- work ........ play --> taob@io.org
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